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The following issues and limitations are known:
In some cases, a Parallelstore instance is created that does not
meet the expected performance numbers. If your
performance testing shows that your
instance's IOPS are insufficient, you should delete and recreate your
Parallelstore instance.
The number of files in a directory is limited to 1.8 million. The actual
limit may be lower and is specific to each directory, depending on the rest
of the file system.
Mmap in python and pytorch are not compatible with the --disable-caching
flag in dfuse mount. If needed, remove the --disable-caching flag when
mounting dfuse, but be aware of the
implications of caching
across multiple client VMs.
Interception is only effective
for dynamically linked applications that use libc. IO is intercepted in
Python, but not Go.
Once a Parallelstore instance is created, its capacity cannot be changed.
If you use both Shared VPC and VPC Service Controls, you must have the
host project that provides the network and the service project that contains
the Parallelstore instance inside the same perimeter for the Parallelstore
instance to function correctly. Separating the host project and service
project with a perimeter might cause the existing instances to become
unavailable and might prevent the creation of new instances.
