Re: Replicated striped data lose

David Gossage <dgossage@xxxxxxxxxxxxxxxxxx> · Sat, 12 Mar 2016 10:02:38 -0600

On Sat, Mar 12, 2016 at 9:51 AM, Mahdi Adnan <mahdi.adnan@xxxxxxxxxxxxxxxxx> wrote:

    Thanks David,

    My settings are all defaults, i have just created the pool and
    started it.

    I have set the settings as your recommendation and it seems to be
    the same issue;

    Type: Striped-Replicate

    Volume ID: 44adfd8c-2ed1-4aa5-b256-d12b64f7fc14

    Status: Started

    Number of Bricks: 1 x 2 x 2 = 4

    Transport-type: tcp

    Bricks:

    Brick1: gfs001:/bricks/t1/s

    Brick2: gfs002:/bricks/t1/s

    Brick3: gfs001:/bricks/t2/s

    Brick4: gfs002:/bricks/t2/s

    Options Reconfigured:

    performance.stat-prefetch: off

    network.remote-dio: on

    cluster.eager-lock: enable

    performance.io-cache: off

    performance.read-ahead: off

    performance.quick-read: off

    performance.readdir-ahead: on

Is their a raid controller perhaps doing any caching?  

In the gluster logs any errors being reported during migration process?
Since they aren't in use yet have you tested making just mirrored bricks using different pairings of servers two at a time to see if problem follows certain machine or network ports?

    On 03/12/2016 03:25 PM, David Gossage
      wrote:

          On Sat, Mar 12, 2016 at 1:55 AM,
            Mahdi Adnan <mahdi.adnan@xxxxxxxxxxxxxxxxx>
            wrote:

              Dears,
              I have created a replicated striped volume
                with two bricks and two servers but I can't use it
                because when I mount it in ESXi and try to migrate a VM
                to it, the data get corrupted.

                Is any one have any idea why is this happening ?
              Dell 2950 x2

                Seagate 15k 600GB

                CentOS 7.2

                Gluster 3.7.8
              Appreciate your help.

            Most reports of this I have seen end up being settings
              related.  Post gluster volume info. Below is what I have
              seen as most common recommended settings.
            I'd hazard a guess you may have some the read ahead
              cache or prefetch on.

            quick-read=off
            read-ahead=off
            io-cache=off
            stat-prefetch=off
            eager-lock=enable
            remote-dio=on

                    Mahdi Adnan

                    System Admin

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