[Gluster-users] [Gluster-devel] missing files

Ben Turner bturner at redhat.com
Thu Feb 5 21:55:28 UTC 2015


----- Original Message -----
> From: "Pranith Kumar Karampuri" <pkarampu at redhat.com>
> To: "Xavier Hernandez" <xhernandez at datalab.es>, "David F. Robinson" <david.robinson at corvidtec.com>, "Benjamin Turner"
> <bennyturns at gmail.com>
> Cc: gluster-users at gluster.org, "Gluster Devel" <gluster-devel at gluster.org>
> Sent: Thursday, February 5, 2015 5:30:04 AM
> Subject: Re: [Gluster-users] [Gluster-devel] missing files
> 
> 
> On 02/05/2015 03:48 PM, Pranith Kumar Karampuri wrote:
> > I believe David already fixed this. I hope this is the same issue he
> > told about permissions issue.
> Oops, it is not. I will take a look.

Yes David exactly like these:

data-brick02a-homegfs.log:[2015-02-03 19:09:34.568842] I [server.c:518:server_rpc_notify] 0-homegfs-server: disconnecting connection from gfs02a.corvidtec.com-18563-2015/02/03-19:07:58:519134-homegfs-client-2-0-0
data-brick02a-homegfs.log:[2015-02-03 19:09:41.286551] I [server.c:518:server_rpc_notify] 0-homegfs-server: disconnecting connection from gfs01a.corvidtec.com-12804-2015/02/03-19:09:38:497808-homegfs-client-2-0-0
data-brick02a-homegfs.log:[2015-02-03 19:16:35.906412] I [server.c:518:server_rpc_notify] 0-homegfs-server: disconnecting connection from gfs02b.corvidtec.com-27190-2015/02/03-19:15:53:458467-homegfs-client-2-0-0
data-brick02a-homegfs.log:[2015-02-03 19:51:22.761293] I [server.c:518:server_rpc_notify] 0-homegfs-server: disconnecting connection from gfs01a.corvidtec.com-25926-2015/02/03-19:51:02:89070-homegfs-client-2-0-0
data-brick02a-homegfs.log:[2015-02-03 20:54:02.772180] I [server.c:518:server_rpc_notify] 0-homegfs-server: disconnecting connection from gfs01b.corvidtec.com-4175-2015/02/02-16:44:31:179119-homegfs-client-2-0-1

You can 100% verify my theory if you can correlate the time on the disconnects to the time that the missing files were healed.  Can you have a look at /var/log/glusterfs/glustershd.log?  That has all of the healed files + timestamps, if we can see a disconnect during the rsync and a self heal of the missing file I think we can safely assume that the disconnects may have caused this.  I'll try this on my test systems, how much data did you rsync?  What size ish of files / an idea of the dir layout?  

@Pranith - Could bricks flapping up and down during the rsync cause the files to be missing on the first ls(written to 1 subvol but not the other cause it was down), the ls triggered SH, and thats why the files were there for the second ls be a possible cause here?

-b

 
> Pranith
> >
> > Pranith
> > On 02/05/2015 03:44 PM, Xavier Hernandez wrote:
> >> Is the failure repeatable ? with the same directories ?
> >>
> >> It's very weird that the directories appear on the volume when you do
> >> an 'ls' on the bricks. Could it be that you only made a single 'ls'
> >> on fuse mount which not showed the directory ? Is it possible that
> >> this 'ls' triggered a self-heal that repaired the problem, whatever
> >> it was, and when you did another 'ls' on the fuse mount after the
> >> 'ls' on the bricks, the directories were there ?
> >>
> >> The first 'ls' could have healed the files, causing that the
> >> following 'ls' on the bricks showed the files as if nothing were
> >> damaged. If that's the case, it's possible that there were some
> >> disconnections during the copy.
> >>
> >> Added Pranith because he knows better replication and self-heal details.
> >>
> >> Xavi
> >>
> >> On 02/04/2015 07:23 PM, David F. Robinson wrote:
> >>> Distributed/replicated
> >>>
> >>> Volume Name: homegfs
> >>> Type: Distributed-Replicate
> >>> Volume ID: 1e32672a-f1b7-4b58-ba94-58c085e59071
> >>> Status: Started
> >>> Number of Bricks: 4 x 2 = 8
> >>> Transport-type: tcp
> >>> Bricks:
> >>> Brick1: gfsib01a.corvidtec.com:/data/brick01a/homegfs
> >>> Brick2: gfsib01b.corvidtec.com:/data/brick01b/homegfs
> >>> Brick3: gfsib01a.corvidtec.com:/data/brick02a/homegfs
> >>> Brick4: gfsib01b.corvidtec.com:/data/brick02b/homegfs
> >>> Brick5: gfsib02a.corvidtec.com:/data/brick01a/homegfs
> >>> Brick6: gfsib02b.corvidtec.com:/data/brick01b/homegfs
> >>> Brick7: gfsib02a.corvidtec.com:/data/brick02a/homegfs
> >>> Brick8: gfsib02b.corvidtec.com:/data/brick02b/homegfs
> >>> Options Reconfigured:
> >>> performance.io-thread-count: 32
> >>> performance.cache-size: 128MB
> >>> performance.write-behind-window-size: 128MB
> >>> server.allow-insecure: on
> >>> network.ping-timeout: 10
> >>> storage.owner-gid: 100
> >>> geo-replication.indexing: off
> >>> geo-replication.ignore-pid-check: on
> >>> changelog.changelog: on
> >>> changelog.fsync-interval: 3
> >>> changelog.rollover-time: 15
> >>> server.manage-gids: on
> >>>
> >>>
> >>> ------ Original Message ------
> >>> From: "Xavier Hernandez" <xhernandez at datalab.es>
> >>> To: "David F. Robinson" <david.robinson at corvidtec.com>; "Benjamin
> >>> Turner" <bennyturns at gmail.com>
> >>> Cc: "gluster-users at gluster.org" <gluster-users at gluster.org>; "Gluster
> >>> Devel" <gluster-devel at gluster.org>
> >>> Sent: 2/4/2015 6:03:45 AM
> >>> Subject: Re: [Gluster-devel] missing files
> >>>
> >>>> On 02/04/2015 01:30 AM, David F. Robinson wrote:
> >>>>> Sorry. Thought about this a little more. I should have been clearer.
> >>>>> The files were on both bricks of the replica, not just one side. So,
> >>>>> both bricks had to have been up... The files/directories just
> >>>>> don't show
> >>>>> up on the mount.
> >>>>> I was reading and saw a related bug
> >>>>> (https://bugzilla.redhat.com/show_bug.cgi?id=1159484). I saw it
> >>>>> suggested to run:
> >>>>>          find <mount> -d -exec getfattr -h -n trusted.ec.heal {} \;
> >>>>
> >>>> This command is specific for a dispersed volume. It won't do anything
> >>>> (aside from the error you are seeing) on a replicated volume.
> >>>>
> >>>> I think you are using a replicated volume, right ?
> >>>>
> >>>> In this case I'm not sure what can be happening. Is your volume a pure
> >>>> replicated one or a distributed-replicated ? on a pure replicated it
> >>>> doesn't make sense that some entries do not show in an 'ls' when the
> >>>> file is in both replicas (at least without any error message in the
> >>>> logs). On a distributed-replicated it could be caused by some problem
> >>>> while combining contents of each replica set.
> >>>>
> >>>> What's the configuration of your volume ?
> >>>>
> >>>> Xavi
> >>>>
> >>>>>
> >>>>> I get a bunch of errors for operation not supported:
> >>>>> [root at gfs02a homegfs]# find wks_backup -d -exec getfattr -h -n
> >>>>> trusted.ec.heal {} \;
> >>>>> find: warning: the -d option is deprecated; please use -depth
> >>>>> instead,
> >>>>> because the latter is a POSIX-compliant feature.
> >>>>> wks_backup/homer_backup/backup: trusted.ec.heal: Operation not
> >>>>> supported
> >>>>> wks_backup/homer_backup/logs/2014_05_20.log: trusted.ec.heal:
> >>>>> Operation
> >>>>> not supported
> >>>>> wks_backup/homer_backup/logs/2014_05_21.log: trusted.ec.heal:
> >>>>> Operation
> >>>>> not supported
> >>>>> wks_backup/homer_backup/logs/2014_05_18.log: trusted.ec.heal:
> >>>>> Operation
> >>>>> not supported
> >>>>> wks_backup/homer_backup/logs/2014_05_19.log: trusted.ec.heal:
> >>>>> Operation
> >>>>> not supported
> >>>>> wks_backup/homer_backup/logs/2014_05_22.log: trusted.ec.heal:
> >>>>> Operation
> >>>>> not supported
> >>>>> wks_backup/homer_backup/logs: trusted.ec.heal: Operation not
> >>>>> supported
> >>>>> wks_backup/homer_backup: trusted.ec.heal: Operation not supported
> >>>>> ------ Original Message ------
> >>>>> From: "Benjamin Turner" <bennyturns at gmail.com
> >>>>> <mailto:bennyturns at gmail.com>>
> >>>>> To: "David F. Robinson" <david.robinson at corvidtec.com
> >>>>> <mailto:david.robinson at corvidtec.com>>
> >>>>> Cc: "Gluster Devel" <gluster-devel at gluster.org
> >>>>> <mailto:gluster-devel at gluster.org>>; "gluster-users at gluster.org"
> >>>>> <gluster-users at gluster.org <mailto:gluster-users at gluster.org>>
> >>>>> Sent: 2/3/2015 7:12:34 PM
> >>>>> Subject: Re: [Gluster-devel] missing files
> >>>>>> It sounds to me like the files were only copied to one replica,
> >>>>>> werent
> >>>>>> there for the initial for the initial ls which triggered a self
> >>>>>> heal,
> >>>>>> and were there for the last ls because they were healed. Is there
> >>>>>> any
> >>>>>> chance that one of the replicas was down during the rsync? It could
> >>>>>> be that you lost a brick during copy or something like that. To
> >>>>>> confirm I would look for disconnects in the brick logs as well as
> >>>>>> checking glusterfshd.log to verify the missing files were actually
> >>>>>> healed.
> >>>>>>
> >>>>>> -b
> >>>>>>
> >>>>>> On Tue, Feb 3, 2015 at 5:37 PM, David F. Robinson
> >>>>>> <david.robinson at corvidtec.com <mailto:david.robinson at corvidtec.com>>
> >>>>>> wrote:
> >>>>>>
> >>>>>>     I rsync'd 20-TB over to my gluster system and noticed that I had
> >>>>>>     some directories missing even though the rsync completed
> >>>>>> normally.
> >>>>>>     The rsync logs showed that the missing files were transferred.
> >>>>>>     I went to the bricks and did an 'ls -al
> >>>>>>     /data/brick*/homegfs/dir/*' the files were on the bricks.
> >>>>>> After I
> >>>>>>     did this 'ls', the files then showed up on the FUSE mounts.
> >>>>>>     1) Why are the files hidden on the fuse mount?
> >>>>>>     2) Why does the ls make them show up on the FUSE mount?
> >>>>>>     3) How can I prevent this from happening again?
> >>>>>>     Note, I also mounted the gluster volume using NFS and saw the
> >>>>>> same
> >>>>>>     behavior. The files/directories were not shown until I did the
> >>>>>>     "ls" on the bricks.
> >>>>>>     David
> >>>>>>     ===============================
> >>>>>>     David F. Robinson, Ph.D.
> >>>>>>     President - Corvid Technologies
> >>>>>>     704.799.6944 x101 <tel:704.799.6944%20x101> [office]
> >>>>>>     704.252.1310 <tel:704.252.1310> [cell]
> >>>>>>     704.799.7974 <tel:704.799.7974> [fax]
> >>>>>>     David.Robinson at corvidtec.com
> >>>>>> <mailto:David.Robinson at corvidtec.com>
> >>>>>>     http://www.corvidtechnologies.com
> >>>>>> <http://www.corvidtechnologies.com/>
> >>>>>>
> >>>>>>     _______________________________________________
> >>>>>>     Gluster-devel mailing list
> >>>>>>     Gluster-devel at gluster.org <mailto:Gluster-devel at gluster.org>
> >>>>>> http://www.gluster.org/mailman/listinfo/gluster-devel
> >>>>>>
> >>>>>>
> >>>>>
> >>>>>
> >>>>> _______________________________________________
> >>>>> Gluster-devel mailing list
> >>>>> Gluster-devel at gluster.org
> >>>>> http://www.gluster.org/mailman/listinfo/gluster-devel
> >>>>>
> >>>
> >
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