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Status Not under consideration
Workspace Db2
Components pureScale
Created by Guest
Created on May 16, 2019

A way can backup and restore pureScale instance

Currently an user is running a pureScale cluster, when all of the SAN disks(including the disk where instance path is on) were corrupted,  he has to do the following to recovery the cluster:

1)  replacing the corrupted disks

2) re-install and setup the pureScale environment from zero

3) restore the databases from backups

The above steps, especially for step 2) is time taken, we need a feature like Oracle OCR, so the user can backup the instance facilities and settings, such as the gpfs definitions and settings, TSA/RSCT definition and settings,  Db2 settings, in file level or similar level, so then disks were corrupted, s/he can replace the corrupted disks, and then restore the pureScale instance from the backup,  without re-installing the pureScale from the start.

 

An alternative is that IBM to fully test the following way and ensure it can work without any problem:

1.  replacing the corrupted disks

2.  Recover the GPFS file systems:

2.1   Recreate the file systems and the NSDs by GPFS mm* commands. Note the name of the file system and NSDs must be exactly the same with what they were originally.
 2.2   If PR was used then re-setup PR.


3.   Recovery the pureScale instance by restoring the files from file level backup

4.  Restore the databases from database backups.

 

  • Guest
    May 24, 2019

    Hi Alan,
      Thank you very much for your consideration of customer need. I would like to clarify if we can follow the technote to recover whole purescale after corrupted disk replaced and GPFS filesystem recovered.
    Regards,
    Ringo Pang

  • Guest
    May 22, 2019

    Accepted this idea as a nice way to automate the procedure as much as we can.  This will be prioritized among other ideas submitted on a regular basis.  For the time being, there is a technote that describes how to backup and restore Spectrum Scale configuration files which may be of help - https://www.ibm.com/developerworks/data/library/techarticle/dm-1306purescaleshareddir/dm-1306purescaleshareddir-pdf.pdf