Filestore - Multiple Instance - Write concurrency

[Bobby B]

Greetings. Does Filestore have any constraints on how many VM's can concurrently write to file system like Persistent Disks storage which is capped at 2 N2 Machine Types as described in link below?

https://cloud.google.com/compute/docs/disks/sharing-disks-between-vms

[Andres Marquez Rodriguez]

You can attach an SSD persistent disk in multi-writer mode to up to two N2 VMs simultaneously so that both VMs can read and write to the disk.[1]

TLDR: 2

[1] https://cloud.google.com/compute/docs/disks#:~:text=You%20can%20attach%20an%20SSD%20persistent%20disk%20in%20multi%2Dwriter%20mode%20to%20up%20to%20two%20N2%20VMs%20simultaneously%20so%20that%20both%20VMs%20can%20read%20and%20write%20to%20the%20disk.

[Bobby Buddha]

Greetings. You misunderstood my question. I agree that PD's only support upto 2 instances in multi writer mode. My question is about filestore and is there any such constraint.

CHeers, B

[Andres Marquez Rodriguez]

Hi bbuddha,

For filestore, the constraint is only 1 VM writing for the same file, and 128 VMs for different files.[1]

[1]https://cloud.google.com/filestore/docs/limits#file_locks