[Gluster-users] rsync to gluster mount: self-heal and bad performance

[Ben Turner]

----- Original Message -----
> From: "Tiemen Ruiten" <t.ruiten at rdmedia.com>
> To: "gluster-users" <gluster-users at gluster.org>
> Sent: Sunday, November 15, 2015 5:22:08 AM
> Subject: Re: [Gluster-users] rsync to gluster mount: self-heal and bad	performance
> 
> Any other suggestions?

You are correct, rsync should not cause self heal on every file.  It makes me think that Ernie is correct and that something isn't correct.  If you just create a bunch of files out side of rsync do you see the same behavior?  What rsync command are you running, where are you syncing the data from?  I see you have the acl mount option, are you using ACLs?

-b


> 
> On 13 November 2015 at 09:56, Tiemen Ruiten < t.ruiten at rdmedia.com > wrote:
> 
> 
> 
> Hello Ernie, list,
> 
> No, that's not the case. The volume is mounted through glusterfs-fuse - on
> the same server running one of the bricks. The fstab:
> 
> # /etc/fstab
> # Created by anaconda on Tue Aug 18 18:10:49 2015
> #
> # Accessible filesystems, by reference, are maintained under '/dev/disk'
> # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
> #
> UUID=56778fed-bf3f-435e-8c32-edaa8c707f29 / xfs defaults 0 0
> UUID=a44e32ed-cfbe-4ba0-896f-1efff9397ba1 /boot xfs defaults 0 0
> UUID=a344d2bc-266d-4905-85b1-fbb7fe927659 swap swap defaults 0 0
> /dev/vdb1 /data/brick xfs defaults 1 2
> iron2:/lpxassets /mnt/lpxassets glusterfs _netdev,acl 0 0
> 
> 
> 
> 
> On 12 November 2015 at 22:50, Ernie Dunbar < maillist at lightspeed.ca > wrote:
> 
> 
> Hi Tiemen
> 
> It sounds like you're trying to rsync files onto your Gluster server, rather
> than to the Gluster filesystem. You want to copy these files into the
> mounted filesystem (typically on some other system than the Gluster
> servers), because Gluster is designed to handle it that way.
> 
> I can't remember the nitty gritty details about why this is, but I've made
> this mistake before as well. Hope that helps. :)
> 
> 
> On 2015-11-12 11:31, Tiemen Ruiten wrote:
> 
> 
> 
> Hello,
> 
> While rsyncing to a directory mounted through glusterfs fuse,
> performance is very bad and it appears every synced file generates a
> (metadata) self-heal.
> 
> The volume is mounted with option acl and acl's are set on a
> subdirectory.
> 
> Setup is as follows:
> 
> Two Centos 7 VM's (KVM), with Gluster 3.7.6 and one physical CentOS 6
> node, also Gluster 3.7.6. Physical node functions as arbiter. So it's
> a replica 3 arbiter 1 volume. The bricks are LVM's with XFS
> filesystem.
> 
> While I don't think I should expect top performance for rsync on
> Gluster, I wouldn't expect every file synced to trigger a self-heal.
> Anything I can do to improve this? Should I file a bug?
> 
> Another thing that looks related, I see a lot of these messages,
> especially when doing IO:
> 
> [2015-11-12 19:25:42.185904] I [dict.c:473:dict_get]
> (-->/usr/lib64/glusterfs/3.7.6/xlator/debug/io-stats.so(io_stats_lookup_cbk+0x121)
> [0x7fdcc2d31161]
> -->/usr/lib64/glusterfs/3.7.6/xlator/system/posix-acl.so(posix_acl_lookup_cbk+0x242)
> [0x7fdcc2b1b212] -->/lib64/libglusterfs.so.0(dict_get+0xac)
> [0x7fdcd5e770cc] ) 0-dict: !this || key=system.posix_acl_default
> [Invalid argument]
> 
> --
> 
> Tiemen Ruiten
> Systems Engineer
> R&D Media
> 
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> 
> 
> --
> Tiemen Ruiten
> Systems Engineer
> R&D Media
> 
> 
> 
> --
> Tiemen Ruiten
> Systems Engineer
> R&D Media
> 
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