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Protect Stgpool, Replicate Node and client backups

mattl

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Hello,

Sorry if I've posted this in the wrong section.

Can anyone tell me if protect stgpool and replicate node can be run at the same time that client backups are occurring?

Is there any IBM documentation that states that protect stgpool shouldn't be run at the same time that clients are adding backup data to the storage pool?

Thanks
 

dietmar

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i would say protect stgpool OR replicate node. And of course yes. There is a point where u miss the chunks (protect) or the meta Data + maybe chunks (replicate ) on the target. Depending on requirements and admin "window" run it more than once a day. Some Applications dump their transaction logs randomly to the ISP Server. If that would fail it would be a nogo.
 

mattl

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Thanks for the reply.

We want a server script to run every two hours which will run protect stgpool and then after that completes will run replicate node. If the script runs every two hours then at some point a client backup will be occurring that is adding data to the storage pool whilst either protect stgpool or replicate node is running.

We were previously told by IBM that it wasn't best practice to have client backups occurring at the same time that either protect stgpool/replicate node is happening.

Do you think that this advice from IBM was incorrect?

Thanks
 

marclant

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From a technical point of view, they all can run at the same time without any risk.

From a practical and performance point of view, you can run protect and client backups at the same time because the protect doesn't work at the filespace level. So that's fine.

Replicate node however works at the filespace level, just like client backups, so that can have an impact on performance, potential lock contention that could delay transactions while one waits for the other to complete. Plus the backups that happen during replication risk only being replicated in the following replication run.

So what many do is run protect stgpool multiple times a day like you are planning to do, so that moves all the extents over early which means replication will only have extents to move. And then only run replication once a day after the majority of the client backups are done.
 

mattl

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Thank you for the clear explanation
 

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The Spectrum Protect TLA (Three-Letter Acronym): ISP or something else?

  • Every product needs a TLA, Let's call it ISP (IBM Spectrum Protect).

    Votes: 20 18.7%
  • Keep using TSM for Spectrum Protect.

    Votes: 65 60.7%
  • Let's be formal and just say Spectrum Protect

    Votes: 13 12.1%
  • Other (please comement)

    Votes: 9 8.4%

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