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June 7th, 2023 08:00
VM Snapshot SAP
Hi experts,
I want to back up my VM with snapshots
On the VM are installed SAP and HANA DB. Are there any best practices for this? Give it / have I use pre-freeze and post-thaw scripts during the snapshot ?
If so, where can I find these scripts?
Many thanks
Best Regards
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crazyrov
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1.3K Posts
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June 9th, 2023 04:00
Hi @Mechi !
The best practice is to use the correct NetWorker module which in this case is NetWorker Module for SAP. Do not use VM image level backups for other than for MS SQL and OS backup.
barry_beckers
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June 18th, 2023 07:00
if there even would be such scripts, then asking for them in the networker community might not be of help, as suspending an application, any application really, is completely up to the application in question of how that is to be achieved. So regardless of which backup product is used, the application is very likely to be suspended in the same way.
Beware also that on NW end it is much more than enabling the checkbox to perform quiescing. Nothing more. So NW is unaware of the status of the pre-freeze and post-thaw scripts being run, it is simply handed to the installed vmware tools, which expect the scripts o be called and located on a specific directory, which depends on the vmware version being used if I recall correctly.
So NW will be unaware if the suspending has even succeeded, so that would have o be checked independently from the NW backups. Also situations can occur that NW cannot perform the quiesced snapshot and will rather silently fall back unto a non-quiesced snapshot. I believe that very recent NW version was supposed to get an improvement for that. Can't recall what it was exactly and in which version. One would prefer to have control over whether or not a backup should fail if quiescing cannot be performed, instead of silently with just a warning falling back unto non-quiesced snapshots...
I still see it as a big miss that pretty much still for years only MSSQL offers integration with NW vproxy based vmware backups (and that also limited to simple standalone instances) instead of offering to do just that for the whole range of applications/databases that the various NW modules support.
So if and when you want to remain properly in control of the backups, then still making in-quest level backups of SAP environments is the way forward....
Dunno what the RPO is supposed to be of such SAP environment, but if you normally would have a transaction backup running each x hours, would you then also run a snapshot backup instead each x hours?