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Recupera datos con la recuperación de un momento determinado (PITR)

En esta página, se describe cómo usar la recuperación de un momento determinado (PITR) para retener y recuperar datos en Spanner para bases de datos con dialecto de GoogleSQL y bases de datos con dialecto de PostgreSQL.

Para obtener más información, consulta Recuperación de un momento determinado.

Requisitos previos

En esta guía, se usan la base de datos y el esquema definidos en la guía de inicio rápido de Spanner. Puedes ejecutar el inicio rápido para crear la base de datos y el esquema, o bien modificar los comandos para usarlos con tu propia base de datos.

Configura el período de retención

Para establecer el período de retención de tu base de datos, haz lo siguiente:

Console

Ve a la página Instancias de Spanner en la consola deGoogle Cloud .

Ir a la página Instancias de Spanner
Haz clic en la instancia que contiene la base de datos para abrir su página de Descripción general.
Haz clic en la base de datos para abrir su página Descripción general.
Selecciona la pestaña Copia de seguridad/Restablecimiento.
Haz clic en el ícono de lápiz en el campo Período de retención de la versión.
Ingresa una cantidad y una unidad de tiempo para el período de retención y, luego, haz clic en Actualizar.

gcloud

Actualiza el esquema de la base de datos con la instrucción ALTER DATABASE. Por ejemplo:

gcloud spanner databases ddl update example-db \
    --instance=test-instance \
    --ddl='ALTER DATABASE `example-db` \
    SET OPTIONS (version_retention_period="7d");'

Para ver el período de retención, obtén el DDL de tu base de datos:

gcloud spanner databases ddl describe example-db \
    --instance=test-instance

Esta es la salida:

ALTER DATABASE example-db SET OPTIONS (
  version_retention_period = '7d'
);
...

Bibliotecas cliente

C#


using Google.Cloud.Spanner.Data;
using System.Threading.Tasks;

public class CreateDatabaseWithRetentionPeriodAsyncSample
{
    public async Task CreateDatabaseWithRetentionPeriodAsync(string projectId, string instanceId, string databaseId)
    {
        string connectionString = $"Data Source=projects/{projectId}/instances/{instanceId}";

        using var connection = new SpannerConnection(connectionString);
        var versionRetentionPeriod = "7d";
        var createStatement = $"CREATE DATABASE `{databaseId}`";
        var alterStatement = @$"ALTER DATABASE `{databaseId}` SET OPTIONS
                   (version_retention_period = '{versionRetentionPeriod}')";
        // The retention period cannot be set as part of the CREATE DATABASE statement,
        // but can be set using an ALTER DATABASE statement directly after database creation.
        using var createDbCommand = connection.CreateDdlCommand(
            createStatement,
            alterStatement
        );
        await createDbCommand.ExecuteNonQueryAsync();
    }
}

C++

void CreateDatabaseWithVersionRetentionPeriod(
    google::cloud::spanner_admin::DatabaseAdminClient client,
    std::string const& project_id, std::string const& instance_id,
    std::string const& database_id) {
  google::cloud::spanner::Database database(project_id, instance_id,
                                            database_id);
  google::spanner::admin::database::v1::CreateDatabaseRequest request;
  request.set_parent(database.instance().FullName());
  request.set_create_statement("CREATE DATABASE `" + database.database_id() +
                               "`");
  request.add_extra_statements("ALTER DATABASE `" + database.database_id() +
                               "` " +
                               "SET OPTIONS (version_retention_period='2h')");
  request.add_extra_statements(R"""(
      CREATE TABLE Singers (
          SingerId   INT64 NOT NULL,
          FirstName  STRING(1024),
          LastName   STRING(1024),
          SingerInfo BYTES(MAX),
          FullName   STRING(2049)
              AS (ARRAY_TO_STRING([FirstName, LastName], " ")) STORED
      ) PRIMARY KEY (SingerId))""");
  request.add_extra_statements(R"""(
      CREATE TABLE Albums (
          SingerId     INT64 NOT NULL,
          AlbumId      INT64 NOT NULL,
          AlbumTitle   STRING(MAX)
      ) PRIMARY KEY (SingerId, AlbumId),
          INTERLEAVE IN PARENT Singers ON DELETE CASCADE)""");
  auto db = client.CreateDatabase(request).get();
  if (!db) throw std::move(db).status();
  std::cout << "Database " << db->name() << " created.\n";

  auto ddl = client.GetDatabaseDdl(db->name());
  if (!ddl) throw std::move(ddl).status();
  std::cout << "Database DDL is:\n" << ddl->DebugString();
}

Go

import (
	"context"
	"fmt"
	"io"
	"regexp"

	database "cloud.google.com/go/spanner/admin/database/apiv1"
	adminpb "cloud.google.com/go/spanner/admin/database/apiv1/databasepb"
)

func createDatabaseWithRetentionPeriod(ctx context.Context, w io.Writer, db string) error {
	matches := regexp.MustCompile("^(.+)/databases/(.+)$").FindStringSubmatch(db)
	if matches == nil || len(matches) != 3 {
		return fmt.Errorf("createDatabaseWithRetentionPeriod: invalid database id %q", db)
	}

	adminClient, err := database.NewDatabaseAdminClient(ctx)
	if err != nil {
		return fmt.Errorf("createDatabaseWithRetentionPeriod.NewDatabaseAdminClient: %w", err)
	}
	defer adminClient.Close()

	// Create a database with a version retention period of 7 days.
	retentionPeriod := "7d"
	alterDatabase := fmt.Sprintf(
		"ALTER DATABASE `%s` SET OPTIONS (version_retention_period = '%s')",
		matches[2], retentionPeriod,
	)
	req := adminpb.CreateDatabaseRequest{
		Parent:          matches[1],
		CreateStatement: "CREATE DATABASE `" + matches[2] + "`",
		ExtraStatements: []string{
			`CREATE TABLE Singers (
				SingerId   INT64 NOT NULL,
				FirstName  STRING(1024),
				LastName   STRING(1024),
				SingerInfo BYTES(MAX)
			) PRIMARY KEY (SingerId)`,
			`CREATE TABLE Albums (
				SingerId     INT64 NOT NULL,
				AlbumId      INT64 NOT NULL,
				AlbumTitle   STRING(MAX)
			) PRIMARY KEY (SingerId, AlbumId),
			INTERLEAVE IN PARENT Singers ON DELETE CASCADE`,
			alterDatabase,
		},
	}
	op, err := adminClient.CreateDatabase(ctx, &req)
	if err != nil {
		return fmt.Errorf("createDatabaseWithRetentionPeriod.CreateDatabase: %w", err)
	}
	if _, err := op.Wait(ctx); err != nil {
		return fmt.Errorf("createDatabaseWithRetentionPeriod.Wait: %w", err)
	}
	fmt.Fprintf(w, "Created database [%s] with version retention period %q\n", db, retentionPeriod)
	return nil
}

Java


import com.google.cloud.spanner.Spanner;
import com.google.cloud.spanner.SpannerException;
import com.google.cloud.spanner.SpannerExceptionFactory;
import com.google.cloud.spanner.SpannerOptions;
import com.google.cloud.spanner.admin.database.v1.DatabaseAdminClient;
import com.google.common.collect.Lists;
import com.google.spanner.admin.database.v1.CreateDatabaseRequest;
import com.google.spanner.admin.database.v1.Database;
import com.google.spanner.admin.database.v1.InstanceName;
import java.util.concurrent.ExecutionException;

public class CreateDatabaseWithVersionRetentionPeriodSample {

  static void createDatabaseWithVersionRetentionPeriod() {
    // TODO(developer): Replace these variables before running the sample.
    String projectId = "my-project";
    String instanceId = "my-instance";
    String databaseId = "my-database";
    String versionRetentionPeriod = "7d";

    createDatabaseWithVersionRetentionPeriod(projectId, instanceId, databaseId,
        versionRetentionPeriod);
  }

  static void createDatabaseWithVersionRetentionPeriod(String projectId,
      String instanceId, String databaseId, String versionRetentionPeriod) {
    try (Spanner spanner =
        SpannerOptions.newBuilder().setProjectId(projectId).build().getService();
        DatabaseAdminClient databaseAdminClient = spanner.createDatabaseAdminClient()) {
      CreateDatabaseRequest request =
          CreateDatabaseRequest.newBuilder()
              .setParent(InstanceName.of(projectId, instanceId).toString())
              .setCreateStatement("CREATE DATABASE `" + databaseId + "`")
              .addAllExtraStatements(Lists.newArrayList("ALTER DATABASE " + "`" + databaseId + "`"
                  + " SET OPTIONS ( version_retention_period = '" + versionRetentionPeriod + "' )"))
              .build();
      Database database =
          databaseAdminClient.createDatabaseAsync(request).get();
      System.out.println("Created database [" + database.getName() + "]");
      System.out.println("\tVersion retention period: " + database.getVersionRetentionPeriod());
      System.out.println("\tEarliest version time: " + database.getEarliestVersionTime());
    } catch (ExecutionException e) {
      // If the operation failed during execution, expose the cause.
      throw (SpannerException) e.getCause();
    } catch (InterruptedException e) {
      // Throw when a thread is waiting, sleeping, or otherwise occupied,
      // and the thread is interrupted, either before or during the activity.
      throw SpannerExceptionFactory.propagateInterrupt(e);
    }
  }
}

Node.js


// Imports the Google Cloud client library
const {Spanner} = require('@google-cloud/spanner');

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// const projectId = 'my-project-id';
// const instanceId = 'my-instance';

// creates a client
const spanner = new Spanner({
  projectId: projectId,
});

// Gets a reference to a Cloud Spanner Database Admin Client object
const databaseAdminClient = spanner.getDatabaseAdminClient();

try {
  // Create a new database with an extra statement which will alter the
  // database after creation to set the version retention period.
  console.log(
    `Creating database ${databaseAdminClient.instancePath(
      projectId,
      instanceId,
    )}.`,
  );
  const versionRetentionStatement = `
    ALTER DATABASE \`${databaseId}\`
    SET OPTIONS (version_retention_period = '1d')`;

  const [operation] = await databaseAdminClient.createDatabase({
    createStatement: 'CREATE DATABASE `' + databaseId + '`',
    extraStatements: [versionRetentionStatement],
    parent: databaseAdminClient.instancePath(projectId, instanceId),
  });

  console.log(`Waiting for operation on ${databaseId} to complete...`);
  await operation.promise();
  console.log(`
      Created database ${databaseId} with version retention period.`);

  const [metadata] = await databaseAdminClient.getDatabase({
    name: databaseAdminClient.databasePath(projectId, instanceId, databaseId),
  });

  console.log(`Version retention period: ${metadata.versionRetentionPeriod}`);
  const milliseconds =
    parseInt(metadata.earliestVersionTime.seconds, 10) * 1000 +
    parseInt(metadata.earliestVersionTime.nanos, 10) / 1e6;
  const date = new Date(milliseconds);
  console.log(`Earliest version time: ${date.toString()}`);
} catch (err) {
  console.error('ERROR:', err);
}

PHP

use Google\Cloud\Spanner\Admin\Database\V1\Client\DatabaseAdminClient;
use Google\Cloud\Spanner\Admin\Database\V1\CreateDatabaseRequest;
use Google\Cloud\Spanner\Admin\Database\V1\GetDatabaseRequest;

/**
 * Creates a database with data retention for Point In Time Restore.
 * Example:
 * ```
 * create_database_with_version_retention_period($projectId, $instanceId, $databaseId, $retentionPeriod);
 * ```
 *
 * @param string $projectId The Google Cloud project ID.
 * @param string $instanceId The Spanner instance ID.
 * @param string $databaseId The Spanner database ID.
 * @param string $retentionPeriod The data retention period for the database.
 */
function create_database_with_version_retention_period(
    string $projectId,
    string $instanceId,
    string $databaseId,
    string $retentionPeriod
): void {
    $databaseAdminClient = new DatabaseAdminClient();
    $instance = $databaseAdminClient->instanceName($projectId, $instanceId);
    $databaseFullName = $databaseAdminClient->databaseName($projectId, $instanceId, $databaseId);

    $operation = $databaseAdminClient->createDatabase(
        new CreateDatabaseRequest([
            'parent' => $instance,
            'create_statement' => sprintf('CREATE DATABASE `%s`', $databaseId),
            'extra_statements' => [
                'CREATE TABLE Singers (' .
                'SingerId     INT64 NOT NULL,' .
                'FirstName    STRING(1024),' .
                'LastName     STRING(1024),' .
                'SingerInfo   BYTES(MAX)' .
                ') PRIMARY KEY (SingerId)',
                'CREATE TABLE Albums (' .
                    'SingerId     INT64 NOT NULL,' .
                    'AlbumId      INT64 NOT NULL,' .
                    'AlbumTitle   STRING(MAX)' .
                ') PRIMARY KEY (SingerId, AlbumId),' .
                'INTERLEAVE IN PARENT Singers ON DELETE CASCADE',
                "ALTER DATABASE `$databaseId` SET OPTIONS(version_retention_period='$retentionPeriod')"
            ]
        ])
    );

    print('Waiting for operation to complete...' . PHP_EOL);
    $operation->pollUntilComplete();

    $request = new GetDatabaseRequest(['name' => $databaseFullName]);
    $databaseInfo = $databaseAdminClient->getDatabase($request);

    print(sprintf(
        'Database %s created with version retention period %s',
        $databaseInfo->getName(), $databaseInfo->getVersionRetentionPeriod()
    ) . PHP_EOL);
}

Python

def create_database_with_version_retention_period(
    instance_id, database_id, retention_period
):
    """Creates a database with a version retention period."""

    from google.cloud.spanner_admin_database_v1.types import spanner_database_admin

    spanner_client = spanner.Client()
    database_admin_api = spanner_client.database_admin_api
    ddl_statements = [
        "CREATE TABLE Singers ("
        + "  SingerId   INT64 NOT NULL,"
        + "  FirstName  STRING(1024),"
        + "  LastName   STRING(1024),"
        + "  SingerInfo BYTES(MAX)"
        + ") PRIMARY KEY (SingerId)",
        "CREATE TABLE Albums ("
        + "  SingerId     INT64 NOT NULL,"
        + "  AlbumId      INT64 NOT NULL,"
        + "  AlbumTitle   STRING(MAX)"
        + ") PRIMARY KEY (SingerId, AlbumId),"
        + "  INTERLEAVE IN PARENT Singers ON DELETE CASCADE",
        "ALTER DATABASE `{}`"
        " SET OPTIONS (version_retention_period = '{}')".format(
            database_id, retention_period
        ),
    ]
    operation = database_admin_api.create_database(
        request=spanner_database_admin.CreateDatabaseRequest(
            parent=database_admin_api.instance_path(
                spanner_client.project, instance_id
            ),
            create_statement="CREATE DATABASE `{}`".format(database_id),
            extra_statements=ddl_statements,
        )
    )

    db = operation.result(30)
    print(
        "Database {} created with version retention period {} and earliest version time {}".format(
            db.name, db.version_retention_period, db.earliest_version_time
        )
    )

    database_admin_api.drop_database(
        spanner_database_admin.DropDatabaseRequest(database=db.name)
    )

Ruby

# project_id  = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"

require "google/cloud/spanner"
require "google/cloud/spanner/admin/database"

database_admin_client = Google::Cloud::Spanner::Admin::Database.database_admin

instance_path = database_admin_client.instance_path project: project_id, instance: instance_id

version_retention_period = "7d"

db_path = database_admin_client.database_path project: project_id,
                                              instance: instance_id,
                                              database: database_id

job = database_admin_client.create_database parent: instance_path,
                                            create_statement: "CREATE DATABASE `#{database_id}`",
                                            extra_statements: [
                                              "CREATE TABLE Singers (
    SingerId     INT64 NOT NULL,
    FirstName    STRING(1024),
    LastName     STRING(1024),
    SingerInfo   BYTES(MAX)
  ) PRIMARY KEY (SingerId)",

                                              "CREATE TABLE Albums (
    SingerId     INT64 NOT NULL,
    AlbumId      INT64 NOT NULL,
    AlbumTitle   STRING(MAX)
  ) PRIMARY KEY (SingerId, AlbumId),
  INTERLEAVE IN PARENT Singers ON DELETE CASCADE",

                                              "ALTER DATABASE `#{database_id}`
    SET OPTIONS ( version_retention_period = '#{version_retention_period}' )"
                                            ]

puts "Waiting for create database operation to complete"

job.wait_until_done!
database = database_admin_client.get_database name: db_path

puts "Created database #{database_id} on instance #{instance_id}"
puts "\tVersion retention period: #{database.version_retention_period}"
puts "\tEarliest version time: #{database.earliest_version_time}"

Notas de uso:

El período de retención debe ser de entre 1 hora y 7 días, y se puede especificar en días, horas, minutos o segundos. Por ejemplo, los valores 1d, 24h, 1440m y 86400s son equivalentes.
Si habilitaste el registro para la API de Spanner en tu proyecto, el evento se registrará como UpdateDatabaseDdl y se podrá ver en el Explorador de registros.
Para volver al período de retención predeterminado de 1 hora, puedes establecer la opción de base de datos version_retention_period en NULL para las bases de datos de GoogleSQL o en DEFAULT para las bases de datos de PostgreSQL.
Cuando extiendes el período de retención, el sistema no completa las versiones anteriores de los datos. Por ejemplo, si extiendes el período de retención de una hora a 24 horas, debes esperar 23 horas para que el sistema acumule datos antiguos antes de poder recuperar datos de las últimas 24 horas.

Obtén el período de retención y la fecha de la versión más antigua

El recurso Database incluye dos campos:

version_retention_period: Es el período en el que Spanner retiene todas las versiones de los datos de la base de datos.
earliest_version_time: Es la marca de tiempo más antigua en la que se pueden leer versiones anteriores de los datos de la base de datos. Spanner actualiza este valor de forma continua y se vuelve obsoleto en el momento en que se consulta. Si usas este valor para recuperar datos, asegúrate de tener en cuenta el tiempo desde el momento en que se consulta el valor hasta el momento en que inicias la recuperación.

Console

Ve a la página Instancias de Spanner en la consola de Google Cloud .

Ir a la página Instancias de Spanner
Haz clic en la instancia que contiene la base de datos para abrir su página de Descripción general.
Haz clic en la base de datos para abrir su página Descripción general.
Selecciona la pestaña Copia de seguridad/Restablecimientos para abrir la página Copia de seguridad/Restablecimientos y mostrar el período de retención.
Haz clic en Crear para abrir la página Crear una copia de seguridad y mostrar la hora de la versión más antigua.

gcloud

Puedes obtener estos campos llamando a describe databases o list databases. Por ejemplo:

gcloud spanner databases describe example-db \
    --instance=test-instance

Esta es la salida:

createTime: '2020-09-07T16:56:08.285140Z'
earliestVersionTime: '2020-10-07T16:56:08.285140Z'
name: projects/my-project/instances/test-instance/databases/example-db
state: READY
versionRetentionPeriod: 3d

Recupera una parte de tu base de datos

Realiza una lectura inactiva y especifica la marca de tiempo de recuperación necesaria. Asegúrate de que la marca de tiempo que especifiques sea más reciente que earliest_version_time. de la base de datos.
gcloud
Usa execute-sql. Por ejemplo:
```
gcloud spanner databases execute-sql example-db \
    --instance=test-instance
    --read-timestamp=2020-09-11T10:19:36.010459-07:00\
    --sql='SELECT * FROM SINGERS'
```
Bibliotecas cliente
Consulta Realizar una lectura inactiva.
Almacena los resultados de la consulta. Esto es obligatorio porque no puedes volver a escribir los resultados de la consulta en la base de datos en la misma transacción. Para cantidades pequeñas de datos, puedes imprimirlos en la consola o almacenarlos en la memoria. Para cantidades más grandes de datos, es posible que debas escribir en un archivo local.
Escribe los datos recuperados en la tabla que se debe recuperar. Por ejemplo:
gcloud
```
gcloud spanner rows update --instance=test-instance
    --database=example-db --table=Singers \
    --data=SingerId=1,FirstName='Marc'
```
Para obtener más información, consulta cómo actualizar datos con gcloud.
Bibliotecas cliente
Para obtener más información, consulta cómo actualizar datos con DML o cómo actualizar datos con mutaciones.
De forma opcional, si deseas analizar los datos recuperados antes de volver a escribirlos, puedes crear manualmente una tabla temporal en la misma base de datos, escribir primero los datos recuperados en esta tabla temporal, realizar el análisis y, luego, leer los datos que deseas recuperar de esta tabla temporal y escribirlos en la tabla que se debe recuperar.

Recupera una base de datos completa

Puedes recuperar toda la base de datos con Backup and Restore o Import and Export y especificar una marca de tiempo de recuperación.

Copia de seguridad y restablecimiento

Crea una copia de seguridad y configura version_time en la marca de tiempo de recuperación necesaria.

Console

Ve a la página Detalles de la base de datos en la consola de Cloud.

Ir a la consola de Cloud
En la pestaña Copias de seguridad/restablecimientos, haz clic en Crear.
Marca la casilla Crear copia de seguridad desde un momento anterior.

gcloud

gcloud spanner backups create example-db-backup-1 \
    --instance=test-instance \
    --database=example-db \
    --retention-period=1y \
    --version-time=2021-01-22T01:10:35Z --async

Para obtener más información, consulta Crea una copia de seguridad con gcloud.

Bibliotecas cliente

C#

// Copyright 2020 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.


using Google.Cloud.Spanner.Admin.Database.V1;
using Google.Cloud.Spanner.Common.V1;
using Google.LongRunning;
using Google.Protobuf.WellKnownTypes;
using System;

public class CreateBackupSample
{
    public Backup CreateBackup(string projectId, string instanceId, string databaseId, string backupId, DateTime versionTime)
    {
        // Create the DatabaseAdminClient instance.
        DatabaseAdminClient databaseAdminClient = DatabaseAdminClient.Create();

        // Initialize request parameters.
        Backup backup = new Backup
        {
            DatabaseAsDatabaseName = DatabaseName.FromProjectInstanceDatabase(projectId, instanceId, databaseId),
            ExpireTime = DateTime.UtcNow.AddDays(14).ToTimestamp(),
            VersionTime = versionTime.ToTimestamp(),
        };
        InstanceName instanceName = InstanceName.FromProjectInstance(projectId, instanceId);

        // Make the CreateBackup request.
        Operation<Backup, CreateBackupMetadata> response = databaseAdminClient.CreateBackup(instanceName, backup, backupId);

        Console.WriteLine("Waiting for the operation to finish.");

        // Poll until the returned long-running operation is complete.
        Operation<Backup, CreateBackupMetadata> completedResponse = response.PollUntilCompleted();

        if (completedResponse.IsFaulted)
        {
            Console.WriteLine($"Error while creating backup: {completedResponse.Exception}");
            throw completedResponse.Exception;
        }

        Console.WriteLine($"Backup created successfully.");

        // GetBackup to get more information about the created backup.
        BackupName backupName = BackupName.FromProjectInstanceBackup(projectId, instanceId, backupId);
        backup = databaseAdminClient.GetBackup(backupName);
        Console.WriteLine($"Backup {backup.Name} of size {backup.SizeBytes} bytes " +
                      $"was created at {backup.CreateTime} from {backup.Database} " +
                      $"and is in state {backup.State} " +
                      $"and has version time {backup.VersionTime}");
        return backup;
    }
}

C++

void CreateBackup(google::cloud::spanner_admin::DatabaseAdminClient client,
                  std::string const& project_id, std::string const& instance_id,
                  std::string const& database_id, std::string const& backup_id,
                  google::cloud::spanner::Timestamp expire_time,
                  google::cloud::spanner::Timestamp version_time) {
  google::cloud::spanner::Database database(project_id, instance_id,
                                            database_id);
  google::spanner::admin::database::v1::CreateBackupRequest request;
  request.set_parent(database.instance().FullName());
  request.set_backup_id(backup_id);
  request.mutable_backup()->set_database(database.FullName());
  *request.mutable_backup()->mutable_expire_time() =
      expire_time.get<google::protobuf::Timestamp>().value();
  *request.mutable_backup()->mutable_version_time() =
      version_time.get<google::protobuf::Timestamp>().value();
  auto backup = client.CreateBackup(request).get();
  if (!backup) throw std::move(backup).status();
  std::cout
      << "Backup " << backup->name() << " of " << backup->database()
      << " of size " << backup->size_bytes() << " bytes as of "
      << google::cloud::spanner::MakeTimestamp(backup->version_time()).value()
      << " was created at "
      << google::cloud::spanner::MakeTimestamp(backup->create_time()).value()
      << ".\n";
}

Go


import (
	"context"
	"fmt"
	"io"
	"regexp"
	"time"

	database "cloud.google.com/go/spanner/admin/database/apiv1"
	adminpb "cloud.google.com/go/spanner/admin/database/apiv1/databasepb"
	pbt "github.com/golang/protobuf/ptypes/timestamp"
)

func createBackup(ctx context.Context, w io.Writer, db, backupID string, versionTime time.Time) error {
	// versionTime := time.Now().AddDate(0, 0, -1) // one day ago
	matches := regexp.MustCompile("^(.+)/databases/(.+)$").FindStringSubmatch(db)
	if matches == nil || len(matches) != 3 {
		return fmt.Errorf("createBackup: invalid database id %q", db)
	}

	adminClient, err := database.NewDatabaseAdminClient(ctx)
	if err != nil {
		return fmt.Errorf("createBackup.NewDatabaseAdminClient: %w", err)
	}
	defer adminClient.Close()

	expireTime := time.Now().AddDate(0, 0, 14)
	// Create a backup.
	req := adminpb.CreateBackupRequest{
		Parent:   matches[1],
		BackupId: backupID,
		Backup: &adminpb.Backup{
			Database:    db,
			ExpireTime:  &pbt.Timestamp{Seconds: expireTime.Unix(), Nanos: int32(expireTime.Nanosecond())},
			VersionTime: &pbt.Timestamp{Seconds: versionTime.Unix(), Nanos: int32(versionTime.Nanosecond())},
		},
	}
	op, err := adminClient.CreateBackup(ctx, &req)
	if err != nil {
		return fmt.Errorf("createBackup.CreateBackup: %w", err)
	}
	// Wait for backup operation to complete.
	backup, err := op.Wait(ctx)
	if err != nil {
		return fmt.Errorf("createBackup.Wait: %w", err)
	}

	// Get the name, create time, version time and backup size.
	backupCreateTime := time.Unix(backup.CreateTime.Seconds, int64(backup.CreateTime.Nanos))
	backupVersionTime := time.Unix(backup.VersionTime.Seconds, int64(backup.VersionTime.Nanos))
	fmt.Fprintf(w,
		"Backup %s of size %d bytes was created at %s with version time %s\n",
		backup.Name,
		backup.SizeBytes,
		backupCreateTime.Format(time.RFC3339),
		backupVersionTime.Format(time.RFC3339))
	return nil
}

Java

static void createBackup(DatabaseAdminClient dbAdminClient, String projectId, String instanceId,
    String databaseId, String backupId, Timestamp versionTime) {
  // Set expire time to 14 days from now.
  Timestamp expireTime =
      Timestamp.newBuilder().setSeconds(TimeUnit.MILLISECONDS.toSeconds((
          System.currentTimeMillis() + TimeUnit.DAYS.toMillis(14)))).build();
  BackupName backupName = BackupName.of(projectId, instanceId, backupId);
  Backup backup = Backup.newBuilder()
      .setName(backupName.toString())
      .setDatabase(DatabaseName.of(projectId, instanceId, databaseId).toString())
      .setExpireTime(expireTime).setVersionTime(versionTime).build();

  // Initiate the request which returns an OperationFuture.
  System.out.println("Creating backup [" + backupId + "]...");
  try {
    // Wait for the backup operation to complete.
    backup = dbAdminClient.createBackupAsync(
        InstanceName.of(projectId, instanceId), backup, backupId).get();
    System.out.println("Created backup [" + backup.getName() + "]");
  } catch (ExecutionException e) {
    throw SpannerExceptionFactory.asSpannerException(e);
  } catch (InterruptedException e) {
    throw SpannerExceptionFactory.propagateInterrupt(e);
  }

  // Reload the metadata of the backup from the server.
  backup = dbAdminClient.getBackup(backup.getName());
  System.out.println(
      String.format(
          "Backup %s of size %d bytes was created at %s for version of database at %s",
          backup.getName(),
          backup.getSizeBytes(),
          java.time.OffsetDateTime.ofInstant(
              Instant.ofEpochSecond(backup.getCreateTime().getSeconds(),
                  backup.getCreateTime().getNanos()), ZoneId.systemDefault()),
          java.time.OffsetDateTime.ofInstant(
              Instant.ofEpochSecond(backup.getVersionTime().getSeconds(),
                  backup.getVersionTime().getNanos()), ZoneId.systemDefault()))
  );
}

Node.js


// Imports the Google Cloud client library and precise date library
const {Spanner, protos} = require('@google-cloud/spanner');
const {PreciseDate} = require('@google-cloud/precise-date');

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// const projectId = 'my-project-id';
// const instanceId = 'my-instance';
// const databaseId = 'my-database';
// const backupId = 'my-backup';
// const versionTime = Date.now() - 1000 * 60 * 60 * 24; // One day ago

// Creates a client
const spanner = new Spanner({
  projectId: projectId,
});

// Gets a reference to a Cloud Spanner Database Admin Client object
const databaseAdminClient = spanner.getDatabaseAdminClient();

// Creates a new backup of the database
try {
  console.log(
    `Creating backup of database ${databaseAdminClient.databasePath(
      projectId,
      instanceId,
      databaseId,
    )}.`,
  );

  // Expire backup 14 days in the future
  const expireTime = Date.now() + 1000 * 60 * 60 * 24 * 14;

  // Create a backup of the state of the database at the current time.
  const [operation] = await databaseAdminClient.createBackup({
    parent: databaseAdminClient.instancePath(projectId, instanceId),
    backupId: backupId,
    backup: (protos.google.spanner.admin.database.v1.Backup = {
      database: databaseAdminClient.databasePath(
        projectId,
        instanceId,
        databaseId,
      ),
      expireTime: Spanner.timestamp(expireTime).toStruct(),
      versionTime: Spanner.timestamp(versionTime).toStruct(),
      name: databaseAdminClient.backupPath(projectId, instanceId, backupId),
    }),
  });

  console.log(
    `Waiting for backup ${databaseAdminClient.backupPath(
      projectId,
      instanceId,
      backupId,
    )} to complete...`,
  );
  await operation.promise();

  // Verify backup is ready
  const [backupInfo] = await databaseAdminClient.getBackup({
    name: databaseAdminClient.backupPath(projectId, instanceId, backupId),
  });
  if (backupInfo.state === 'READY') {
    console.log(
      `Backup ${backupInfo.name} of size ` +
        `${backupInfo.sizeBytes} bytes was created at ` +
        `${new PreciseDate(backupInfo.createTime).toISOString()} ` +
        'for version of database at ' +
        `${new PreciseDate(backupInfo.versionTime).toISOString()}`,
    );
  } else {
    console.error('ERROR: Backup is not ready.');
  }
} catch (err) {
  console.error('ERROR:', err);
} finally {
  // Close the spanner client when finished.
  // The databaseAdminClient does not require explicit closure. The closure of the Spanner client will automatically close the databaseAdminClient.
  spanner.close();
}

PHP

use Google\Cloud\Spanner\Admin\Database\V1\Backup;
use Google\Cloud\Spanner\Admin\Database\V1\GetBackupRequest;
use Google\Cloud\Spanner\Admin\Database\V1\Client\DatabaseAdminClient;
use Google\Cloud\Spanner\Admin\Database\V1\CreateBackupRequest;
use Google\Protobuf\Timestamp;

/**
 * Create a backup.
 * Example:
 * ```
 * create_backup($projectId, $instanceId, $databaseId, $backupId, $versionTime);
 * ```
 *
 * @param string $projectId The Google Cloud project ID.
 * @param string $instanceId The Spanner instance ID.
 * @param string $databaseId The Spanner database ID.
 * @param string $backupId The Spanner backup ID.
 * @param string $versionTime The version of the database to backup. Read more
 * at https://cloud.google.com/spanner/docs/reference/rest/v1/projects.instances.backups#Backup.FIELDS.version_time
 */
function create_backup(
    string $projectId,
    string $instanceId,
    string $databaseId,
    string $backupId,
    string $versionTime = '-1hour'
): void {
    $databaseAdminClient = new DatabaseAdminClient();
    $databaseFullName = DatabaseAdminClient::databaseName($projectId, $instanceId, $databaseId);
    $instanceFullName = DatabaseAdminClient::instanceName($projectId, $instanceId);
    $timestamp = new Timestamp();
    $timestamp->setSeconds((new \DateTime($versionTime))->getTimestamp());
    $expireTime = new Timestamp();
    $expireTime->setSeconds((new \DateTime('+14 days'))->getTimestamp());
    $request = new CreateBackupRequest([
        'parent' => $instanceFullName,
        'backup_id' => $backupId,
        'backup' => new Backup([
            'database' => $databaseFullName,
            'expire_time' => $expireTime,
            'version_time' => $timestamp
        ])
    ]);

    $operation = $databaseAdminClient->createBackup($request);

    print('Waiting for operation to complete...' . PHP_EOL);
    $operation->pollUntilComplete();

    $request = new GetBackupRequest();
    $request->setName($databaseAdminClient->backupName($projectId, $instanceId, $backupId));
    $info = $databaseAdminClient->getBackup($request);
    printf(
        'Backup %s of size %d bytes was created at %d for version of database at %d' . PHP_EOL,
        basename($info->getName()),
        $info->getSizeBytes(),
        $info->getCreateTime()->getSeconds(),
        $info->getVersionTime()->getSeconds());
}

Python

def create_backup(instance_id, database_id, backup_id, version_time):
    """Creates a backup for a database."""

    from google.cloud.spanner_admin_database_v1.types import backup as backup_pb

    spanner_client = spanner.Client()
    database_admin_api = spanner_client.database_admin_api

    # Create a backup
    expire_time = datetime.utcnow() + timedelta(days=14)

    request = backup_pb.CreateBackupRequest(
        parent=database_admin_api.instance_path(spanner_client.project, instance_id),
        backup_id=backup_id,
        backup=backup_pb.Backup(
            database=database_admin_api.database_path(
                spanner_client.project, instance_id, database_id
            ),
            expire_time=expire_time,
            version_time=version_time,
        ),
    )

    operation = database_admin_api.create_backup(request)

    # Wait for backup operation to complete.
    backup = operation.result(2100)

    # Verify that the backup is ready.
    assert backup.state == backup_pb.Backup.State.READY

    print(
        "Backup {} of size {} bytes was created at {} for version of database at {}".format(
            backup.name, backup.size_bytes, backup.create_time, backup.version_time
        )
    )

Ruby

# project_id  = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID"
# backup_id = "Your Spanner backup ID"
# version_time = Time.now - 60 * 60 * 24 # 1 day ago

require "google/cloud/spanner"
require "google/cloud/spanner/admin/database"

database_admin_client = Google::Cloud::Spanner::Admin::Database.database_admin

instance_path = database_admin_client.instance_path project: project_id, instance: instance_id
db_path = database_admin_client.database_path project: project_id,
                                              instance: instance_id,
                                              database: database_id
backup_path = database_admin_client.backup_path project: project_id,
                                                instance: instance_id,
                                                backup: backup_id
expire_time = Time.now + (14 * 24 * 3600) # 14 days from now

job = database_admin_client.create_backup parent: instance_path,
                                          backup_id: backup_id,
                                          backup: {
                                            database: db_path,
                                              expire_time: expire_time,
                                              version_time: version_time
                                          }

puts "Backup operation in progress"

job.wait_until_done!

backup = database_admin_client.get_backup name: backup_path
puts "Backup #{backup_id} of size #{backup.size_bytes} bytes was created at #{backup.create_time} for version of database at #{backup.version_time}"

Restablece la copia de seguridad en una base de datos nueva. Ten en cuenta que Spanner conserva la configuración del período de retención de la copia de seguridad en la base de datos restablecida.

Console

Ve a la página Detalles de instancias en la consola de Cloud.

Ir a la consola de Cloud
En la pestaña Copia de seguridad/Restablecimientos, selecciona una copia de seguridad y haz clic en Restablecer.

gcloud

gcloud spanner databases restore --async \
  --destination-instance=destination-instance --destination-database=example-db-restored \
  --source-instance=test-instance --source-backup=example-db-backup-1

Para obtener más información, consulta Cómo restablecer una base de datos a partir de una copia de seguridad.

Bibliotecas cliente

C#


using Google.Cloud.Spanner.Admin.Database.V1;
using Google.Cloud.Spanner.Common.V1;
using Google.LongRunning;
using System;

public class RestoreDatabaseSample
{
    public RestoreInfo RestoreDatabase(string projectId, string instanceId, string databaseId, string backupId)
    {
        // Create the DatabaseAdminClient instance.
        DatabaseAdminClient databaseAdminClient = DatabaseAdminClient.Create();

        InstanceName parentAsInstanceName = InstanceName.FromProjectInstance(projectId, instanceId);
        BackupName backupAsBackupName = BackupName.FromProjectInstanceBackup(projectId, instanceId, backupId);

        // Make the RestoreDatabase request.
        Operation<Database, RestoreDatabaseMetadata> response = databaseAdminClient.RestoreDatabase(parentAsInstanceName, databaseId, backupAsBackupName);

        Console.WriteLine("Waiting for the operation to finish");

        // Poll until the returned long-running operation is complete.
        var completedResponse = response.PollUntilCompleted();

        if (completedResponse.IsFaulted)
        {
            Console.WriteLine($"Database Restore Failed: {completedResponse.Exception}");
            throw completedResponse.Exception;
        }

        RestoreInfo restoreInfo = completedResponse.Result.RestoreInfo;
        Console.WriteLine(
            $"Database {restoreInfo.BackupInfo.SourceDatabase} was restored " +
            $"to {databaseId} from backup {restoreInfo.BackupInfo.Backup} " +
            $"with version time {restoreInfo.BackupInfo.VersionTime}");

        return restoreInfo;
    }
}

C++

void RestoreDatabase(google::cloud::spanner_admin::DatabaseAdminClient client,
                     std::string const& project_id,
                     std::string const& instance_id,
                     std::string const& database_id,
                     std::string const& backup_id) {
  google::cloud::spanner::Database database(project_id, instance_id,
                                            database_id);
  google::cloud::spanner::Backup backup(database.instance(), backup_id);
  auto restored_db =
      client
          .RestoreDatabase(database.instance().FullName(),
                           database.database_id(), backup.FullName())
          .get();
  if (!restored_db) throw std::move(restored_db).status();
  std::cout << "Database";
  if (restored_db->restore_info().source_type() ==
      google::spanner::admin::database::v1::BACKUP) {
    auto const& backup_info = restored_db->restore_info().backup_info();
    std::cout << " " << backup_info.source_database() << " as of "
              << google::cloud::spanner::MakeTimestamp(
                     backup_info.version_time())
                     .value();
  }
  std::cout << " restored to " << restored_db->name();
  std::cout << " from backup " << backup.FullName();
  std::cout << ".\n";
}

Go


import (
	"context"
	"fmt"
	"io"
	"regexp"

	database "cloud.google.com/go/spanner/admin/database/apiv1"
	adminpb "cloud.google.com/go/spanner/admin/database/apiv1/databasepb"
)

func restoreBackup(ctx context.Context, w io.Writer, db, backupID string) error {
	adminClient, err := database.NewDatabaseAdminClient(ctx)
	if err != nil {
		return err
	}
	defer adminClient.Close()

	matches := regexp.MustCompile("^(.*)/databases/(.*)$").FindStringSubmatch(db)
	if matches == nil || len(matches) != 3 {
		return fmt.Errorf("Invalid database id %s", db)
	}
	instanceName := matches[1]
	databaseID := matches[2]
	backupName := instanceName + "/backups/" + backupID

	// Start restoring backup to a new database.
	restoreOp, err := adminClient.RestoreDatabase(ctx, &adminpb.RestoreDatabaseRequest{
		Parent:     instanceName,
		DatabaseId: databaseID,
		Source: &adminpb.RestoreDatabaseRequest_Backup{
			Backup: backupName,
		},
	})
	if err != nil {
		return err
	}
	// Wait for restore operation to complete.
	dbObj, err := restoreOp.Wait(ctx)
	if err != nil {
		return err
	}
	// Newly created database has restore information.
	backupInfo := dbObj.RestoreInfo.GetBackupInfo()
	if backupInfo != nil {
		fmt.Fprintf(w, "Source database %s restored from backup %s\n", backupInfo.SourceDatabase, backupInfo.Backup)
	}

	return nil
}

Java

static void restoreBackup(
    DatabaseAdminClient dbAdminClient,
    String projectId,
    String instanceId,
    String backupId,
    String restoreToDatabaseId) {
  BackupName backupName = BackupName.of(projectId, instanceId, backupId);
  Backup backup = dbAdminClient.getBackup(backupName);
  // Initiate the request which returns an OperationFuture.
  System.out.println(String.format(
      "Restoring backup [%s] to database [%s]...", backup.getName(), restoreToDatabaseId));
  try {
    RestoreDatabaseRequest request =
        RestoreDatabaseRequest.newBuilder()
            .setParent(InstanceName.of(projectId, instanceId).toString())
            .setDatabaseId(restoreToDatabaseId)
            .setBackup(backupName.toString()).build();
    OperationFuture<com.google.spanner.admin.database.v1.Database, RestoreDatabaseMetadata> op =
        dbAdminClient.restoreDatabaseAsync(request);
    // Wait until the database has been restored.
    com.google.spanner.admin.database.v1.Database db = op.get();
    // Get the restore info.
    RestoreInfo restoreInfo = db.getRestoreInfo();
    BackupInfo backupInfo = restoreInfo.getBackupInfo();

    System.out.println(
        "Restored database ["
            + db.getName()
            + "] from ["
            + restoreInfo.getBackupInfo().getBackup()
            + "] with version time [" + backupInfo.getVersionTime() + "]");
  } catch (ExecutionException e) {
    throw SpannerExceptionFactory.newSpannerException(e.getCause());
  } catch (InterruptedException e) {
    throw SpannerExceptionFactory.propagateInterrupt(e);
  }
}

Node.js

// Imports the Google Cloud client library and precise date library
const {Spanner} = require('@google-cloud/spanner');
const {PreciseDate} = require('@google-cloud/precise-date');

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// const projectId = 'my-project-id';
// const instanceId = 'my-instance';
// const databaseId = 'my-database';
// const backupId = 'my-backup';

// Creates a client
const spanner = new Spanner({
  projectId: projectId,
});

// Gets a reference to a Cloud Spanner Database Admin Client object
const databaseAdminClient = spanner.getDatabaseAdminClient();

// Restore the database
console.log(
  `Restoring database ${databaseAdminClient.databasePath(
    projectId,
    instanceId,
    databaseId,
  )} from backup ${backupId}.`,
);
const [restoreOperation] = await databaseAdminClient.restoreDatabase({
  parent: databaseAdminClient.instancePath(projectId, instanceId),
  databaseId: databaseId,
  backup: databaseAdminClient.backupPath(projectId, instanceId, backupId),
});

// Wait for restore to complete
console.log('Waiting for database restore to complete...');
await restoreOperation.promise();

console.log('Database restored from backup.');
const [metadata] = await databaseAdminClient.getDatabase({
  name: databaseAdminClient.databasePath(projectId, instanceId, databaseId),
});
console.log(
  `Database ${metadata.restoreInfo.backupInfo.sourceDatabase} was restored ` +
    `to ${databaseId} from backup ${metadata.restoreInfo.backupInfo.backup} ` +
    'with version time ' +
    `${new PreciseDate(
      metadata.restoreInfo.backupInfo.versionTime,
    ).toISOString()}.`,
);

PHP

use Google\Cloud\Spanner\Admin\Database\V1\Client\DatabaseAdminClient;
use Google\Cloud\Spanner\Admin\Database\V1\RestoreDatabaseRequest;

/**
 * Restore a database from a backup.
 * Example:
 * ```
 * restore_backup($projectId, $instanceId, $databaseId, $backupId);
 * ```
 * @param string $projectId The Google Cloud project ID.
 * @param string $instanceId The Spanner instance ID.
 * @param string $databaseId The Spanner database ID.
 * @param string $backupId The Spanner backup ID.
 */
function restore_backup(
    string $projectId,
    string $instanceId,
    string $databaseId,
    string $backupId
): void {
    $databaseAdminClient = new DatabaseAdminClient();

    $backupName = DatabaseAdminClient::backupName($projectId, $instanceId, $backupId);
    $instanceName = DatabaseAdminClient::instanceName($projectId, $instanceId);

    $request = new RestoreDatabaseRequest([
        'parent' => $instanceName,
        'database_id' => $databaseId,
        'backup' => $backupName
    ]);

    $operationResponse = $databaseAdminClient->restoreDatabase($request);
    $operationResponse->pollUntilComplete();

    $database = $operationResponse->operationSucceeded() ? $operationResponse->getResult() : null;
    $restoreInfo = $database->getRestoreInfo();
    $backupInfo = $restoreInfo->getBackupInfo();
    $sourceDatabase = $backupInfo->getSourceDatabase();
    $sourceBackup = $backupInfo->getBackup();
    $versionTime = $backupInfo->getVersionTime()->getSeconds();
    printf(
        'Database %s restored from backup %s with version time %s' . PHP_EOL,
        $sourceDatabase, $sourceBackup, $versionTime
    );
}

Python

def restore_database(instance_id, new_database_id, backup_id):
    """Restores a database from a backup."""
    from google.cloud.spanner_admin_database_v1 import RestoreDatabaseRequest

    spanner_client = spanner.Client()
    database_admin_api = spanner_client.database_admin_api

    # Start restoring an existing backup to a new database.
    request = RestoreDatabaseRequest(
        parent=database_admin_api.instance_path(spanner_client.project, instance_id),
        database_id=new_database_id,
        backup=database_admin_api.backup_path(
            spanner_client.project, instance_id, backup_id
        ),
    )
    operation = database_admin_api.restore_database(request)

    # Wait for restore operation to complete.
    db = operation.result(1600)

    # Newly created database has restore information.
    restore_info = db.restore_info
    print(
        "Database {} restored to {} from backup {} with version time {}.".format(
            restore_info.backup_info.source_database,
            new_database_id,
            restore_info.backup_info.backup,
            restore_info.backup_info.version_time,
        )
    )

Ruby

# project_id  = "Your Google Cloud project ID"
# instance_id = "Your Spanner instance ID"
# database_id = "Your Spanner database ID of where to restore"
# backup_id = "Your Spanner backup ID"

require "google/cloud/spanner"
require "google/cloud/spanner/admin/database"

database_admin_client = Google::Cloud::Spanner::Admin::Database.database_admin

instance_path = database_admin_client.instance_path project: project_id, instance: instance_id

db_path = database_admin_client.database_path project: project_id,
                                              instance: instance_id,
                                              database: database_id

backup_path = database_admin_client.backup_path project: project_id,
                                                instance: instance_id,
                                                backup: backup_id

job = database_admin_client.restore_database parent: instance_path,
                                             database_id: database_id,
                                             backup: backup_path

puts "Waiting for restore backup operation to complete"

job.wait_until_done!

database = database_admin_client.get_database name: db_path
restore_info = database.restore_info
puts "Database #{restore_info.backup_info.source_database} was restored to #{database_id} from backup #{restore_info.backup_info.backup} with version time #{restore_info.backup_info.version_time}"

Importación y exportación

Exporta la base de datos y especifica el parámetro snapshotTime en la marca de tiempo de recuperación necesaria.
Console
1. Ve a la página Detalles de instancias en la consola de Cloud.
  
  Ir a la consola de Cloud
2. En la pestaña Importar/Exportar, haz clic en Exportar.
3. Marca la casilla Export database from an earlier point in time.
Para obtener instrucciones detalladas, consulta cómo exportar una base de datos.
gcloud
Usa la plantilla de Dataflow Spanner to Avro para exportar la base de datos.
```
gcloud dataflow jobs run JOB_NAME \
   --gcs-location='gs://cloud-spanner-point-in-time-recovery/Import Export Template/export/templates/Cloud_Spanner_to_GCS_Avro'
   --region=DATAFLOW_REGION \
   --parameters='instanceId=test-instance,databaseId=example-db,outputDir=YOUR_GCS_DIRECTORY,snapshotTime=2020-09-01T23:59:40.125245Z'
```
Notas de uso:

Puedes hacer un seguimiento del progreso de tus trabajos de importación y exportación en la consola de Dataflow.
Spanner garantiza que los datos exportados sean coherentes de forma externa y transaccional en la marca de tiempo especificada.
Especifica la marca de tiempo en formato RFC 3339. Por ejemplo, 2020-09-01T23:59:30.234233Z.
Asegúrate de que la marca de tiempo que especifiques sea más reciente que earliest_version_time de la base de datos. Si los datos ya no existen en la marca de tiempo especificada, recibirás un error.

Importa a una base de datos nueva.

Console

Ve a la página Detalles de instancias en la consola de Cloud.

Ir a la consola de Cloud
En la pestaña Importar/Exportar, haz clic en Importar.

Para obtener instrucciones detalladas, consulta Cómo importar archivos Avro de Spanner.

gcloud

Usa la plantilla de Dataflow Cloud Storage Avro a Spanner para importar los archivos Avro.

gcloud dataflow jobs run JOB_NAME \
   --gcs-location='gs://cloud-spanner-point-in-time-recovery/Import Export Template/import/templates/GCS_Avro_to_Cloud_Spanner' \
   --region=DATAFLOW_REGION \
   --staging-location=YOUR_GCS_STAGING_LOCATION \
   --parameters='instanceId=test-instance,databaseId=example-db,inputDir=YOUR_GCS_DIRECTORY'

Estima el aumento de almacenamiento

Antes de aumentar el período de retención de versiones de una base de datos, puedes estimar el aumento esperado en el uso del almacenamiento de la base de datos sumando los bytes de transacción para el período necesario. Por ejemplo, la siguiente consulta calcula la cantidad de GiB escritos en los últimos 7 días (168 h) a partir de la lectura de las tablas de estadísticas de transacciones.

GoogleSQL

SELECT
  SUM(bytes_per_hour) / (1024 * 1024 * 1024 ) as GiB
FROM (
  SELECT
    ((commit_attempt_count - commit_failed_precondition_count - commit_abort_count) * avg_bytes)
    AS bytes_per_hour, interval_end
  FROM
    spanner_sys.txn_stats_total_hour
  ORDER BY
    interval_end DESC
  LIMIT
    168);

PostgreSQL

SELECT
  bph /  (1024 * 1024 * 1024 ) as GiB
FROM (
  SELECT
    SUM(bytes_per_hour) as bph
  FROM (
    SELECT
      ((commit_attempt_count - commit_failed_precondition_count - commit_abort_count) * avg_bytes)
      AS bytes_per_hour, interval_end
    FROM
      spanner_sys.txn_stats_total_hour
    ORDER BY
      interval_end DESC
    LIMIT
      168)
sub1) sub2;

Ten en cuenta que la búsqueda proporciona una estimación aproximada y puede ser inexacta por varios motivos:

La consulta no tiene en cuenta la marca de tiempo que se debe almacenar para cada versión de los datos antiguos. Si tu base de datos consta de muchos tipos de datos pequeños, es posible que la consulta subestime el aumento de almacenamiento.
La consulta incluye todas las operaciones de escritura, pero solo las operaciones de actualización crean versiones anteriores de los datos. Si tu carga de trabajo incluye muchas operaciones de inserción, es posible que la consulta sobreestime el aumento de almacenamiento.

Recupera datos con la recuperación de un momento determinado (PITR) Organiza tus páginas con colecciones Guarda y categoriza el contenido según tus preferencias.

Requisitos previos

Configura el período de retención

Console

gcloud

Bibliotecas cliente

C#

C++

Go

Java

Node.js

PHP

Python

Ruby

Obtén el período de retención y la fecha de la versión más antigua

Console

gcloud

Recupera una parte de tu base de datos

gcloud

Bibliotecas cliente

gcloud

Bibliotecas cliente

Recupera una base de datos completa

Copia de seguridad y restablecimiento

Console

gcloud

Bibliotecas cliente

C#

C++

Go

Java

Node.js

PHP

Python

Ruby

Console

gcloud

Bibliotecas cliente

C#

C++

Go

Java

Node.js

PHP

Python

Ruby

Importación y exportación

Console

gcloud

Console

gcloud

Estima el aumento de almacenamiento

GoogleSQL

PostgreSQL

Recupera datos con la recuperación de un momento determinado (PITR)