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tanislavm's avatar
tanislavm
Level 6
11 years ago
Solved

vxrecover

hi,

I wish to check a thing.

In production could i use  online the command #vxrecover -sb volume in order to synchronize the plexes under this volume,or raid5 subdisk recovery?

I mean if there is I/O on the filesystem on this volume.tnx a lot.

business continuity
Linux
Storage Foundation
  • Haniwa's avatar
    Haniwa
    11 years ago

    Vx commands are intended to run on live volumes. Synchronization or R5 rebuild will definitely cause I/O. In the case of a mirror, it will read from one plex and write to the other, while the overall file system remains mounted and writable.

    FastResync can be used to reduce the I/O load caused by resynchonization, but... A) it needs to be enabled on the volume ahead of time, and 2) it is a licensed option.

    Marianne is suggesting that you provide context for your question, so it can be determined if vxrecover is the best option. You will get more response that way.

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  • Marianne's avatar
    Marianne
    Level 6
    11 years ago

    Are you experiencing a real issue in your environment?

    If so, please tell us about the problem.
    It is easier to reply to a real issue than trying to answer a theoretical question.

  • Haniwa's avatar
    Haniwa
    Level 4
    11 years ago

    Vx commands are intended to run on live volumes. Synchronization or R5 rebuild will definitely cause I/O. In the case of a mirror, it will read from one plex and write to the other, while the overall file system remains mounted and writable.

    FastResync can be used to reduce the I/O load caused by resynchonization, but... A) it needs to be enabled on the volume ahead of time, and 2) it is a licensed option.

    Marianne is suggesting that you provide context for your question, so it can be determined if vxrecover is the best option. You will get more response that way.

  • tanislavm's avatar
    tanislavm
    Level 6
    11 years ago

    Hi Marianne,

    i do not experience yet such of issue but i wished to know in advance if i could perform vxrecover online.

  • Marianne's avatar
    Marianne
    Level 6
    11 years ago
    As per above excellent post, VxVM is absolutely made for online maintenance. It must be understood though that performance will be affected while resync is taking place.