[Gluster-users] VM disks corruption on 3.7.11

Kevin Lemonnier lemonnierk at ulrar.net
Thu May 12 14:24:14 UTC 2016

As requested on IRC, here are the logs on the 3 nodes.

On Thu, May 12, 2016 at 04:03:02PM +0200, Kevin Lemonnier wrote:
> Hi,
> I had a problem some time ago with 3.7.6 and freezing during heals,
> and multiple persons advised to use 3.7.11 instead. Indeed, with that
> version the freez problem is fixed, it works like a dream ! You can
> almost not tell that a node is down or healing, everything keeps working
> except for a little freez when the node just went down and I assume
> hasn't timed out yet, but that's fine.
> Now I have a 3.7.11 volume on 3 nodes for testing, and the VM are proxmox
> VMs with qCow2 disks stored on the gluster volume.
> Here is the config :
> Volume Name: gluster
> Type: Replicate
> Volume ID: e4f01509-beaf-447d-821f-957cc5c20c0a
> Status: Started
> Number of Bricks: 1 x 3 = 3
> Transport-type: tcp
> Bricks:
> Brick1: ipvr2.client:/mnt/storage/gluster
> Brick2: ipvr3.client:/mnt/storage/gluster
> Brick3: ipvr50.client:/mnt/storage/gluster
> Options Reconfigured:
> cluster.quorum-type: auto
> cluster.server-quorum-type: server
> network.remote-dio: enable
> cluster.eager-lock: enable
> performance.quick-read: off
> performance.read-ahead: off
> performance.io-cache: off
> performance.stat-prefetch: off
> features.shard: on
> features.shard-block-size: 64MB
> cluster.data-self-heal-algorithm: full
> performance.readdir-ahead: on
> As mentioned, I rebooted one of the nodes to test the freezing issue I had
> on previous versions and appart from the initial timeout, nothing, the website
> hosted on the VMs keeps working like a charm even during heal.
> Since it's testing, there isn't any load on it though, and I just tried to refresh
> the database by importing the production one on the two MySQL VMs, and both of them
> started doing I/O errors. I tried shutting them down and powering them on again,
> but same thing, even starting full heals by hand doesn't solve the problem, the disks are
> corrupted. They still work, but sometimes they remount their partitions read only ..
> I believe there is a few people already using 3.7.11, no one noticed corruption problems ?
> Anyone using Proxmox ? As already mentionned in multiple other threads on this mailing list
> by other users, I also have pretty much always shards in heal info, but nothing "stuck" there,
> they always go away in a few seconds getting replaced by other shards.
> Thanks
> -- 
> Kevin Lemonnier
> PGP Fingerprint : 89A5 2283 04A0 E6E9 0111

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> Gluster-users at gluster.org
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Kevin Lemonnier
PGP Fingerprint : 89A5 2283 04A0 E6E9 0111
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