HSM file system filter problems


Description

Free space on an HSM file system runs out and the following error is written to the kernel ring buffer (displayed by the dmesg command):
[CRITICAL] ivd-HSM not listening for FS events! Unmount FS and check OA logs for more details!

Explanation n/a

Workaround

To solve this critical situation, proceed as follows:
1. Check free space on the HSM file system. Invoke the following command:
df -h HSMFileSystemMountPoint
1. Stop the OA implementation:
ivd --stop
2. Extend the size of the volume that stores the HSM file system. Use the lvextend command for this purpose.
3. Reconfigure the corresponding OA partition with modified values for the CriticalWatermark, HighWaterMark, and ReleaseInterval variables to prevent the HSM file system from becoming full.
4. Start the OA implementation:
ivd --start
5. To identify potential inconsistencies, run the following command on the OA partition containing the HSM file system which became full:
ivdcheck --fsc-hsmfs PartitionName

 

Description

If the I/O traffic on an HSM file system is very high, the Hierarchical Storage Manager (HSM) process may stop reading file system events and completely block access to the HSM file system.

Explanation n/a

Workaround

Terminate all user applications that are currently trying to access the HSM file system, including NFS and Samba daemons.