[Gluster-users] 3.8.3 Shards Healing Glacier Slow

Krutika Dhananjay kdhananj at redhat.com
Wed Aug 31 08:50:59 UTC 2016 

No, sorry, it's working fine. I may have missed some step because of which
i saw that problem. /.shard is also healing fine now.

Let me know if it works for you.

-Krutika

On Wed, Aug 31, 2016 at 12:49 PM, Krutika Dhananjay <kdhananj at redhat.com>
wrote:

> OK I just hit the other issue too, where .shard doesn't get healed. :)
>
> Investigating as to why that is the case. Give me some time.
>
> -Krutika
>
> On Wed, Aug 31, 2016 at 12:39 PM, Krutika Dhananjay <kdhananj at redhat.com>
> wrote:
>
>> Just figured the steps Anuradha has provided won't work if granular entry
>> heal is on.
>> So when you bring down a brick and create fake2 under / of the volume,
>> granular entry heal feature causes
>> sh to remember only the fact that 'fake2' needs to be recreated on the
>> offline brick (because changelogs are granular).
>>
>> In this case, we would be required to indicate to self-heal-daemon that
>> the entire directory tree from '/' needs to be repaired on the brick that
>> contains no data.
>>
>> To fix this, I did the following (for users who use granular entry
>> self-healing):
>>
>> 1. Kill the last brick process in the replica (/bricks/3)
>>
>> 2. [root at server-3 ~]# rm -rf /bricks/3
>>
>> 3. [root at server-3 ~]# mkdir /bricks/3
>>
>> 4. Create a new dir on the mount point:
>>     [root at client-1 ~]# mkdir /mnt/fake
>>
>> 5. Set some fake xattr on the root of the volume, and not the 'fake'
>> directory itself.
>>     [root at client-1 ~]# setfattr -n "user.some-name" -v "some-value" /mnt
>>
>> 6. Make sure there's no io happening on your volume.
>>
>> 7. Check the pending xattrs on the brick directories of the two good
>> copies (on bricks 1 and 2), you should be seeing same values as the one
>> marked in red in both bricks.
>> (note that the client-<num> xattr key will have the same last digit as
>> the index of the brick that is down, when counting from 0. So if the first
>> brick is the one that is down, it would read trusted.afr.*-client-0; if the
>> second brick is the one that is empty and down, it would read
>> trusted.afr.*-client-1 and so on).
>>
>> [root at server-1 ~]# getfattr -d -m . -e hex /bricks/1
>> # file: 1
>> security.selinux=0x756e636f6e66696e65645f753a6f626a6563745f7
>> 23a6574635f72756e74696d655f743a733000
>> trusted.afr.dirty=0x000000000000000000000000
>> *trusted.afr.rep-client-2=0x000000000000000100000001*
>> trusted.gfid=0x00000000000000000000000000000001
>> trusted.glusterfs.dht=0x000000010000000000000000ffffffff
>> trusted.glusterfs.volume-id=0xa349517bb9d44bdf96da8ea324f89e7b
>>
>> [root at server-2 ~]# getfattr -d -m . -e hex /bricks/2
>> # file: 2
>> security.selinux=0x756e636f6e66696e65645f753a6f626a6563745f7
>> 23a6574635f72756e74696d655f743a733000
>> trusted.afr.dirty=0x000000000000000000000000
>> *trusted.afr.rep-client-2=0x000**000000000000100000001*
>> trusted.gfid=0x00000000000000000000000000000001
>> trusted.glusterfs.dht=0x000000010000000000000000ffffffff
>> trusted.glusterfs.volume-id=0xa349517bb9d44bdf96da8ea324f89e7b
>>
>> 8. Flip the 8th digit in the trusted.afr.<VOLNAME>-client-2 to a 1.
>>
>> [root at server-1 ~]# setfattr -n trusted.afr.rep-client-2 -v
>> *0x000000010000000100000001* /bricks/1
>> [root at server-2 ~]# setfattr -n trusted.afr.rep-client-2 -v
>> *0x000000010000000100000001* /bricks/2
>>
>> 9. Get the xattrs again and check the xattrs are set properly now
>>
>> [root at server-1 ~]# getfattr -d -m . -e hex /bricks/1
>> # file: 1
>> security.selinux=0x756e636f6e66696e65645f753a6f626a6563745f7
>> 23a6574635f72756e74696d655f743a733000
>> trusted.afr.dirty=0x000000000000000000000000
>> *trusted.afr.rep-client-2=0x000**000010000000100000001*
>> trusted.gfid=0x00000000000000000000000000000001
>> trusted.glusterfs.dht=0x000000010000000000000000ffffffff
>> trusted.glusterfs.volume-id=0xa349517bb9d44bdf96da8ea324f89e7b
>>
>> [root at server-2 ~]# getfattr -d -m . -e hex /bricks/2
>> # file: 2
>> security.selinux=0x756e636f6e66696e65645f753a6f626a6563745f7
>> 23a6574635f72756e74696d655f743a733000
>> trusted.afr.dirty=0x000000000000000000000000
>> *trusted.afr.rep-client-2=0x000**000010000000100000001*
>> trusted.gfid=0x00000000000000000000000000000001
>> trusted.glusterfs.dht=0x000000010000000000000000ffffffff
>> trusted.glusterfs.volume-id=0xa349517bb9d44bdf96da8ea324f89e7b
>>
>> 10. Force-start the volume.
>>
>> [root at server-1 ~]# gluster volume start rep force
>> volume start: rep: success
>>
>> 11. Monitor heal-info command to ensure the number of entries keeps
>> growing.
>>
>> 12. Keep monitoring with step 10 and eventually the number of entries
>> needing heal must come down to 0.
>> Also the checksums of the files on the previously empty brick should now
>> match with the copies on the other two bricks.
>>
>> Could you check if the above steps work for you, in your test environment?
>>
>> You caught a nice bug in the manual steps to follow when granular
>> entry-heal is enabled and an empty brick needs heal. Thanks for reporting
>> it. :) We will fix the documentation appropriately.
>>
>> -Krutika
>>
>>
>> On Wed, Aug 31, 2016 at 11:29 AM, Krutika Dhananjay <kdhananj at redhat.com>
>> wrote:
>>
>>> Tried this.
>>>
>>> With me, only 'fake2' gets healed after i bring the 'empty' brick back
>>> up and it stops there unless I do a 'heal-full'.
>>>
>>> Is that what you're seeing as well?
>>>
>>> -Krutika
>>>
>>> On Wed, Aug 31, 2016 at 4:43 AM, David Gossage <
>>> dgossage at carouselchecks.com> wrote:
>>>
>>>> Same issue brought up glusterd on problem node heal count still stuck
>>>> at 6330.
>>>>
>>>> Ran gluster v heal GUSTER1 full
>>>>
>>>> glustershd on problem node shows a sweep starting and finishing in
>>>> seconds.  Other 2 nodes show no activity in log.  They should start a sweep
>>>> too shouldn't they?
>>>>
>>>> Tried starting from scratch
>>>>
>>>> kill -15 brickpid
>>>> rm -Rf /brick
>>>> mkdir -p /brick
>>>> mkdir mkdir /gsmount/fake2
>>>> setfattr -n "user.some-name" -v "some-value" /gsmount/fake2
>>>>
>>>> Heals visible dirs instantly then stops.
>>>>
>>>> gluster v heal GLUSTER1 full
>>>>
>>>> see sweep star on problem node and end almost instantly.  no files
>>>> added t heal list no files healed no more logging
>>>>
>>>> [2016-08-30 23:11:31.544331] I [MSGID: 108026]
>>>> [afr-self-heald.c:646:afr_shd_full_healer] 0-GLUSTER1-replicate-0:
>>>> starting full sweep on subvol GLUSTER1-client-1
>>>> [2016-08-30 23:11:33.776235] I [MSGID: 108026]
>>>> [afr-self-heald.c:656:afr_shd_full_healer] 0-GLUSTER1-replicate-0:
>>>> finished full sweep on subvol GLUSTER1-client-1
>>>>
>>>> same results no matter which node you run command on.  Still stuck with
>>>> 6330 files showing needing healed out of 19k.  still showing in logs no
>>>> heals are occuring.
>>>>
>>>> Is their a way to forcibly reset any prior heal data?  Could it be
>>>> stuck on some past failed heal start?
>>>>
>>>>
>>>>
>>>>
>>>> *David Gossage*
>>>> *Carousel Checks Inc. | System Administrator*
>>>> *Office* 708.613.2284
>>>>
>>>> On Tue, Aug 30, 2016 at 10:03 AM, David Gossage <
>>>> dgossage at carouselchecks.com> wrote:
>>>>
>>>>> On Tue, Aug 30, 2016 at 10:02 AM, David Gossage <
>>>>> dgossage at carouselchecks.com> wrote:
>>>>>
>>>>>> updated test server to 3.8.3
>>>>>>
>>>>>> Brick1: 192.168.71.10:/gluster2/brick1/1
>>>>>> Brick2: 192.168.71.11:/gluster2/brick2/1
>>>>>> Brick3: 192.168.71.12:/gluster2/brick3/1
>>>>>> Options Reconfigured:
>>>>>> cluster.granular-entry-heal: on
>>>>>> performance.readdir-ahead: on
>>>>>> performance.read-ahead: off
>>>>>> nfs.disable: on
>>>>>> nfs.addr-namelookup: off
>>>>>> nfs.enable-ino32: off
>>>>>> cluster.background-self-heal-count: 16
>>>>>> cluster.self-heal-window-size: 1024
>>>>>> performance.quick-read: off
>>>>>> performance.io-cache: off
>>>>>> performance.stat-prefetch: off
>>>>>> cluster.eager-lock: enable
>>>>>> network.remote-dio: on
>>>>>> cluster.quorum-type: auto
>>>>>> cluster.server-quorum-type: server
>>>>>> storage.owner-gid: 36
>>>>>> storage.owner-uid: 36
>>>>>> server.allow-insecure: on
>>>>>> features.shard: on
>>>>>> features.shard-block-size: 64MB
>>>>>> performance.strict-o-direct: off
>>>>>> cluster.locking-scheme: granular
>>>>>>
>>>>>> kill -15 brickpid
>>>>>> rm -Rf /gluster2/brick3
>>>>>> mkdir -p /gluster2/brick3/1
>>>>>> mkdir mkdir /rhev/data-center/mnt/glusterSD/192.168.71.10
>>>>>> \:_glustershard/fake2
>>>>>> setfattr -n "user.some-name" -v "some-value"
>>>>>> /rhev/data-center/mnt/glusterSD/192.168.71.10\:_glustershard/fake2
>>>>>> gluster v start glustershard force
>>>>>>
>>>>>> at this point brick process starts and all visible files including
>>>>>> new dir are made on brick
>>>>>> handful of shards are in heal statistics still but no .shard
>>>>>> directory created and no increase in shard count
>>>>>>
>>>>>> gluster v heal glustershard
>>>>>>
>>>>>> At this point still no increase in count or dir made no additional
>>>>>> activity in logs for healing generated.  waited few minutes tailing logs to
>>>>>> check if anything kicked in.
>>>>>>
>>>>>> gluster v heal glustershard full
>>>>>>
>>>>>> gluster shards added to list and heal commences.  logs show full
>>>>>> sweep starting on all 3 nodes.  though this time it only shows as finishing
>>>>>> on one which looks to be the one that had brick deleted.
>>>>>>
>>>>>> [2016-08-30 14:45:33.098589] I [MSGID: 108026]
>>>>>> [afr-self-heald.c:646:afr_shd_full_healer]
>>>>>> 0-glustershard-replicate-0: starting full sweep on subvol
>>>>>> glustershard-client-0
>>>>>> [2016-08-30 14:45:33.099492] I [MSGID: 108026]
>>>>>> [afr-self-heald.c:646:afr_shd_full_healer]
>>>>>> 0-glustershard-replicate-0: starting full sweep on subvol
>>>>>> glustershard-client-1
>>>>>> [2016-08-30 14:45:33.100093] I [MSGID: 108026]
>>>>>> [afr-self-heald.c:646:afr_shd_full_healer]
>>>>>> 0-glustershard-replicate-0: starting full sweep on subvol
>>>>>> glustershard-client-2
>>>>>> [2016-08-30 14:52:29.760213] I [MSGID: 108026]
>>>>>> [afr-self-heald.c:656:afr_shd_full_healer]
>>>>>> 0-glustershard-replicate-0: finished full sweep on subvol
>>>>>> glustershard-client-2
>>>>>>
>>>>>
>>>>> Just realized its still healing so that may be why sweep on 2 other
>>>>> bricks haven't replied as finished.
>>>>>
>>>>>>
>>>>>>
>>>>>> my hope is that later tonight a full heal will work on production.
>>>>>> Is it possible self-heal daemon can get stale or stop listening but still
>>>>>> show as active?  Would stopping and starting self-heal daemon from gluster
>>>>>> cli before doing these heals be helpful?
>>>>>>
>>>>>>
>>>>>> On Tue, Aug 30, 2016 at 9:29 AM, David Gossage <
>>>>>> dgossage at carouselchecks.com> wrote:
>>>>>>
>>>>>>> On Tue, Aug 30, 2016 at 8:52 AM, David Gossage <
>>>>>>> dgossage at carouselchecks.com> wrote:
>>>>>>>
>>>>>>>> On Tue, Aug 30, 2016 at 8:01 AM, Krutika Dhananjay <
>>>>>>>> kdhananj at redhat.com> wrote:
>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On Tue, Aug 30, 2016 at 6:20 PM, Krutika Dhananjay <
>>>>>>>>> kdhananj at redhat.com> wrote:
>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On Tue, Aug 30, 2016 at 6:07 PM, David Gossage <
>>>>>>>>>> dgossage at carouselchecks.com> wrote:
>>>>>>>>>>
>>>>>>>>>>> On Tue, Aug 30, 2016 at 7:18 AM, Krutika Dhananjay <
>>>>>>>>>>> kdhananj at redhat.com> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Could you also share the glustershd logs?
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> I'll get them when I get to work sure
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> I tried the same steps that you mentioned multiple times, but
>>>>>>>>>>>> heal is running to completion without any issues.
>>>>>>>>>>>>
>>>>>>>>>>>> It must be said that 'heal full' traverses the files and
>>>>>>>>>>>> directories in a depth-first order and does heals also in the same order.
>>>>>>>>>>>> But if it gets interrupted in the middle (say because self-heal-daemon was
>>>>>>>>>>>> either intentionally or unintentionally brought offline and then brought
>>>>>>>>>>>> back up), self-heal will only pick up the entries that are so far marked as
>>>>>>>>>>>> new-entries that need heal which it will find in indices/xattrop directory.
>>>>>>>>>>>> What this means is that those files and directories that were not visited
>>>>>>>>>>>> during the crawl, will remain untouched and unhealed in this second
>>>>>>>>>>>> iteration of heal, unless you execute a 'heal-full' again.
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> So should it start healing shards as it crawls or not until
>>>>>>>>>>> after it crawls the entire .shard directory?  At the pace it was going that
>>>>>>>>>>> could be a week with one node appearing in the cluster but with no shard
>>>>>>>>>>> files if anything tries to access a file on that node.  From my experience
>>>>>>>>>>> other day telling it to heal full again did nothing regardless of node used.
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>> Crawl is started from '/' of the volume. Whenever self-heal
>>>>>>>>> detects during the crawl that a file or directory is present in some
>>>>>>>>> brick(s) and absent in others, it creates the file on the bricks where it
>>>>>>>>> is absent and marks the fact that the file or directory might need
>>>>>>>>> data/entry and metadata heal too (this also means that an index is created
>>>>>>>>> under .glusterfs/indices/xattrop of the src bricks). And the data/entry and
>>>>>>>>> metadata heal are picked up and done in
>>>>>>>>>
>>>>>>>> the background with the help of these indices.
>>>>>>>>>
>>>>>>>>
>>>>>>>> Looking at my 3rd node as example i find nearly an exact same
>>>>>>>> number of files in xattrop dir as reported by heal count at time I brought
>>>>>>>> down node2 to try and alleviate read io errors that seemed to occur from
>>>>>>>> what I was guessing as attempts to use the node with no shards for reads.
>>>>>>>>
>>>>>>>> Also attached are the glustershd logs from the 3 nodes, along with
>>>>>>>> the test node i tried yesterday with same results.
>>>>>>>>
>>>>>>>
>>>>>>> Looking at my own logs I notice that a full sweep was only ever
>>>>>>> recorded in glustershd.log on 2nd node with missing directory.  I believe I
>>>>>>> should have found a sweep begun on every node correct?
>>>>>>>
>>>>>>> On my test dev when it did work I do see that
>>>>>>>
>>>>>>> [2016-08-30 13:56:25.223333] I [MSGID: 108026]
>>>>>>> [afr-self-heald.c:646:afr_shd_full_healer]
>>>>>>> 0-glustershard-replicate-0: starting full sweep on subvol
>>>>>>> glustershard-client-0
>>>>>>> [2016-08-30 13:56:25.223522] I [MSGID: 108026]
>>>>>>> [afr-self-heald.c:646:afr_shd_full_healer]
>>>>>>> 0-glustershard-replicate-0: starting full sweep on subvol
>>>>>>> glustershard-client-1
>>>>>>> [2016-08-30 13:56:25.224616] I [MSGID: 108026]
>>>>>>> [afr-self-heald.c:646:afr_shd_full_healer]
>>>>>>> 0-glustershard-replicate-0: starting full sweep on subvol
>>>>>>> glustershard-client-2
>>>>>>> [2016-08-30 14:18:48.333740] I [MSGID: 108026]
>>>>>>> [afr-self-heald.c:656:afr_shd_full_healer]
>>>>>>> 0-glustershard-replicate-0: finished full sweep on subvol
>>>>>>> glustershard-client-2
>>>>>>> [2016-08-30 14:18:48.356008] I [MSGID: 108026]
>>>>>>> [afr-self-heald.c:656:afr_shd_full_healer]
>>>>>>> 0-glustershard-replicate-0: finished full sweep on subvol
>>>>>>> glustershard-client-1
>>>>>>> [2016-08-30 14:18:49.637811] I [MSGID: 108026]
>>>>>>> [afr-self-heald.c:656:afr_shd_full_healer]
>>>>>>> 0-glustershard-replicate-0: finished full sweep on subvol
>>>>>>> glustershard-client-0
>>>>>>>
>>>>>>> While when looking at past few days of the 3 prod nodes i only found
>>>>>>> that on my 2nd node
>>>>>>> [2016-08-27 01:26:42.638772] I [MSGID: 108026]
>>>>>>> [afr-self-heald.c:646:afr_shd_full_healer] 0-GLUSTER1-replicate-0:
>>>>>>> starting full sweep on subvol GLUSTER1-client-1
>>>>>>> [2016-08-27 11:37:01.732366] I [MSGID: 108026]
>>>>>>> [afr-self-heald.c:656:afr_shd_full_healer] 0-GLUSTER1-replicate-0:
>>>>>>> finished full sweep on subvol GLUSTER1-client-1
>>>>>>> [2016-08-27 12:58:34.597228] I [MSGID: 108026]
>>>>>>> [afr-self-heald.c:646:afr_shd_full_healer] 0-GLUSTER1-replicate-0:
>>>>>>> starting full sweep on subvol GLUSTER1-client-1
>>>>>>> [2016-08-27 12:59:28.041173] I [MSGID: 108026]
>>>>>>> [afr-self-heald.c:656:afr_shd_full_healer] 0-GLUSTER1-replicate-0:
>>>>>>> finished full sweep on subvol GLUSTER1-client-1
>>>>>>> [2016-08-27 20:03:42.560188] I [MSGID: 108026]
>>>>>>> [afr-self-heald.c:646:afr_shd_full_healer] 0-GLUSTER1-replicate-0:
>>>>>>> starting full sweep on subvol GLUSTER1-client-1
>>>>>>> [2016-08-27 20:03:44.278274] I [MSGID: 108026]
>>>>>>> [afr-self-heald.c:656:afr_shd_full_healer] 0-GLUSTER1-replicate-0:
>>>>>>> finished full sweep on subvol GLUSTER1-client-1
>>>>>>> [2016-08-27 21:00:42.603315] I [MSGID: 108026]
>>>>>>> [afr-self-heald.c:646:afr_shd_full_healer] 0-GLUSTER1-replicate-0:
>>>>>>> starting full sweep on subvol GLUSTER1-client-1
>>>>>>> [2016-08-27 21:00:46.148674] I [MSGID: 108026]
>>>>>>> [afr-self-heald.c:656:afr_shd_full_healer] 0-GLUSTER1-replicate-0:
>>>>>>> finished full sweep on subvol GLUSTER1-client-1
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>>
>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>> My suspicion is that this is what happened on your setup. Could
>>>>>>>>>>>> you confirm if that was the case?
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> Brick was brought online with force start then a full heal
>>>>>>>>>>> launched.  Hours later after it became evident that it was not adding new
>>>>>>>>>>> files to heal I did try restarting self-heal daemon and relaunching full
>>>>>>>>>>> heal again. But this was after the heal had basically already failed to
>>>>>>>>>>> work as intended.
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> OK. How did you figure it was not adding any new files? I need to
>>>>>>>>>> know what places you were monitoring to come to this conclusion.
>>>>>>>>>>
>>>>>>>>>> -Krutika
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>> As for those logs, I did manager to do something that caused
>>>>>>>>>>>> these warning messages you shared earlier to appear in my client and server
>>>>>>>>>>>> logs.
>>>>>>>>>>>> Although these logs are annoying and a bit scary too, they
>>>>>>>>>>>> didn't do any harm to the data in my volume. Why they appear just after a
>>>>>>>>>>>> brick is replaced and under no other circumstances is something I'm still
>>>>>>>>>>>> investigating.
>>>>>>>>>>>>
>>>>>>>>>>>> But for future, it would be good to follow the steps Anuradha
>>>>>>>>>>>> gave as that would allow self-heal to at least detect that it has some
>>>>>>>>>>>> repairing to do whenever it is restarted whether intentionally or otherwise.
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> I followed those steps as described on my test box and ended up
>>>>>>>>>>> with exact same outcome of adding shards at an agonizing slow pace and no
>>>>>>>>>>> creation of .shard directory or heals on shard directory.  Directories
>>>>>>>>>>> visible from mount healed quickly.  This was with one VM so it has only 800
>>>>>>>>>>> shards as well.  After hours at work it had added a total of 33 shards to
>>>>>>>>>>> be healed.  I sent those logs yesterday as well though not the glustershd.
>>>>>>>>>>>
>>>>>>>>>>> Does replace-brick command copy files in same manner?  For these
>>>>>>>>>>> purposes I am contemplating just skipping the heal route.
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>> -Krutika
>>>>>>>>>>>>
>>>>>>>>>>>> On Tue, Aug 30, 2016 at 2:22 AM, David Gossage <
>>>>>>>>>>>> dgossage at carouselchecks.com> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> attached brick and client logs from test machine where same
>>>>>>>>>>>>> behavior occurred not sure if anything new is there.  its still on 3.8.2
>>>>>>>>>>>>>
>>>>>>>>>>>>> Number of Bricks: 1 x 3 = 3
>>>>>>>>>>>>> Transport-type: tcp
>>>>>>>>>>>>> Bricks:
>>>>>>>>>>>>> Brick1: 192.168.71.10:/gluster2/brick1/1
>>>>>>>>>>>>> Brick2: 192.168.71.11:/gluster2/brick2/1
>>>>>>>>>>>>> Brick3: 192.168.71.12:/gluster2/brick3/1
>>>>>>>>>>>>> Options Reconfigured:
>>>>>>>>>>>>> cluster.locking-scheme: granular
>>>>>>>>>>>>> performance.strict-o-direct: off
>>>>>>>>>>>>> features.shard-block-size: 64MB
>>>>>>>>>>>>> features.shard: on
>>>>>>>>>>>>> server.allow-insecure: on
>>>>>>>>>>>>> storage.owner-uid: 36
>>>>>>>>>>>>> storage.owner-gid: 36
>>>>>>>>>>>>> cluster.server-quorum-type: server
>>>>>>>>>>>>> cluster.quorum-type: auto
>>>>>>>>>>>>> network.remote-dio: on
>>>>>>>>>>>>> cluster.eager-lock: enable
>>>>>>>>>>>>> performance.stat-prefetch: off
>>>>>>>>>>>>> performance.io-cache: off
>>>>>>>>>>>>> performance.quick-read: off
>>>>>>>>>>>>> cluster.self-heal-window-size: 1024
>>>>>>>>>>>>> cluster.background-self-heal-count: 16
>>>>>>>>>>>>> nfs.enable-ino32: off
>>>>>>>>>>>>> nfs.addr-namelookup: off
>>>>>>>>>>>>> nfs.disable: on
>>>>>>>>>>>>> performance.read-ahead: off
>>>>>>>>>>>>> performance.readdir-ahead: on
>>>>>>>>>>>>> cluster.granular-entry-heal: on
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>> On Mon, Aug 29, 2016 at 2:20 PM, David Gossage <
>>>>>>>>>>>>> dgossage at carouselchecks.com> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>>> On Mon, Aug 29, 2016 at 7:01 AM, Anuradha Talur <
>>>>>>>>>>>>>> atalur at redhat.com> wrote:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> ----- Original Message -----
>>>>>>>>>>>>>>> > From: "David Gossage" <dgossage at carouselchecks.com>
>>>>>>>>>>>>>>> > To: "Anuradha Talur" <atalur at redhat.com>
>>>>>>>>>>>>>>> > Cc: "gluster-users at gluster.org List" <
>>>>>>>>>>>>>>> Gluster-users at gluster.org>, "Krutika Dhananjay" <
>>>>>>>>>>>>>>> kdhananj at redhat.com>
>>>>>>>>>>>>>>> > Sent: Monday, August 29, 2016 5:12:42 PM
>>>>>>>>>>>>>>> > Subject: Re: [Gluster-users] 3.8.3 Shards Healing Glacier
>>>>>>>>>>>>>>> Slow
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> > On Mon, Aug 29, 2016 at 5:39 AM, Anuradha Talur <
>>>>>>>>>>>>>>> atalur at redhat.com> wrote:
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> > > Response inline.
>>>>>>>>>>>>>>> > >
>>>>>>>>>>>>>>> > > ----- Original Message -----
>>>>>>>>>>>>>>> > > > From: "Krutika Dhananjay" <kdhananj at redhat.com>
>>>>>>>>>>>>>>> > > > To: "David Gossage" <dgossage at carouselchecks.com>
>>>>>>>>>>>>>>> > > > Cc: "gluster-users at gluster.org List" <
>>>>>>>>>>>>>>> Gluster-users at gluster.org>
>>>>>>>>>>>>>>> > > > Sent: Monday, August 29, 2016 3:55:04 PM
>>>>>>>>>>>>>>> > > > Subject: Re: [Gluster-users] 3.8.3 Shards Healing
>>>>>>>>>>>>>>> Glacier Slow
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > > Could you attach both client and brick logs? Meanwhile
>>>>>>>>>>>>>>> I will try these
>>>>>>>>>>>>>>> > > steps
>>>>>>>>>>>>>>> > > > out on my machines and see if it is easily recreatable.
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > > -Krutika
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > > On Mon, Aug 29, 2016 at 2:31 PM, David Gossage <
>>>>>>>>>>>>>>> > > dgossage at carouselchecks.com
>>>>>>>>>>>>>>> > > > > wrote:
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > > Centos 7 Gluster 3.8.3
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > > Brick1: ccgl1.gl.local:/gluster1/BRICK1/1
>>>>>>>>>>>>>>> > > > Brick2: ccgl2.gl.local:/gluster1/BRICK1/1
>>>>>>>>>>>>>>> > > > Brick3: ccgl4.gl.local:/gluster1/BRICK1/1
>>>>>>>>>>>>>>> > > > Options Reconfigured:
>>>>>>>>>>>>>>> > > > cluster.data-self-heal-algorithm: full
>>>>>>>>>>>>>>> > > > cluster.self-heal-daemon: on
>>>>>>>>>>>>>>> > > > cluster.locking-scheme: granular
>>>>>>>>>>>>>>> > > > features.shard-block-size: 64MB
>>>>>>>>>>>>>>> > > > features.shard: on
>>>>>>>>>>>>>>> > > > performance.readdir-ahead: on
>>>>>>>>>>>>>>> > > > storage.owner-uid: 36
>>>>>>>>>>>>>>> > > > storage.owner-gid: 36
>>>>>>>>>>>>>>> > > > performance.quick-read: off
>>>>>>>>>>>>>>> > > > performance.read-ahead: off
>>>>>>>>>>>>>>> > > > performance.io-cache: off
>>>>>>>>>>>>>>> > > > performance.stat-prefetch: on
>>>>>>>>>>>>>>> > > > cluster.eager-lock: enable
>>>>>>>>>>>>>>> > > > network.remote-dio: enable
>>>>>>>>>>>>>>> > > > cluster.quorum-type: auto
>>>>>>>>>>>>>>> > > > cluster.server-quorum-type: server
>>>>>>>>>>>>>>> > > > server.allow-insecure: on
>>>>>>>>>>>>>>> > > > cluster.self-heal-window-size: 1024
>>>>>>>>>>>>>>> > > > cluster.background-self-heal-count: 16
>>>>>>>>>>>>>>> > > > performance.strict-write-ordering: off
>>>>>>>>>>>>>>> > > > nfs.disable: on
>>>>>>>>>>>>>>> > > > nfs.addr-namelookup: off
>>>>>>>>>>>>>>> > > > nfs.enable-ino32: off
>>>>>>>>>>>>>>> > > > cluster.granular-entry-heal: on
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > > Friday did rolling upgrade from 3.8.3->3.8.3 no issues.
>>>>>>>>>>>>>>> > > > Following steps detailed in previous recommendations
>>>>>>>>>>>>>>> began proces of
>>>>>>>>>>>>>>> > > > replacing and healngbricks one node at a time.
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > > 1) kill pid of brick
>>>>>>>>>>>>>>> > > > 2) reconfigure brick from raid6 to raid10
>>>>>>>>>>>>>>> > > > 3) recreate directory of brick
>>>>>>>>>>>>>>> > > > 4) gluster volume start <> force
>>>>>>>>>>>>>>> > > > 5) gluster volume heal <> full
>>>>>>>>>>>>>>> > > Hi,
>>>>>>>>>>>>>>> > >
>>>>>>>>>>>>>>> > > I'd suggest that full heal is not used. There are a few
>>>>>>>>>>>>>>> bugs in full heal.
>>>>>>>>>>>>>>> > > Better safe than sorry ;)
>>>>>>>>>>>>>>> > > Instead I'd suggest the following steps:
>>>>>>>>>>>>>>> > >
>>>>>>>>>>>>>>> > > Currently I brought the node down by systemctl stop
>>>>>>>>>>>>>>> glusterd as I was
>>>>>>>>>>>>>>> > getting sporadic io issues and a few VM's paused so hoping
>>>>>>>>>>>>>>> that will help.
>>>>>>>>>>>>>>> > I may wait to do this till around 4PM when most work is
>>>>>>>>>>>>>>> done in case it
>>>>>>>>>>>>>>> > shoots load up.
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> > > 1) kill pid of brick
>>>>>>>>>>>>>>> > > 2) to configuring of brick that you need
>>>>>>>>>>>>>>> > > 3) recreate brick dir
>>>>>>>>>>>>>>> > > 4) while the brick is still down, from the mount point:
>>>>>>>>>>>>>>> > >    a) create a dummy non existent dir under / of mount.
>>>>>>>>>>>>>>> > >
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> > so if noee 2 is down brick, pick node for example 3 and
>>>>>>>>>>>>>>> make a test dir
>>>>>>>>>>>>>>> > under its brick directory that doesnt exist on 2 or should
>>>>>>>>>>>>>>> I be dong this
>>>>>>>>>>>>>>> > over a gluster mount?
>>>>>>>>>>>>>>> You should be doing this over gluster mount.
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> > >    b) set a non existent extended attribute on / of
>>>>>>>>>>>>>>> mount.
>>>>>>>>>>>>>>> > >
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> > Could you give me an example of an attribute to set?
>>>>>>>>>>>>>>>  I've read a tad on
>>>>>>>>>>>>>>> > this, and looked up attributes but haven't set any yet
>>>>>>>>>>>>>>> myself.
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> Sure. setfattr -n "user.some-name" -v "some-value"
>>>>>>>>>>>>>>> <path-to-mount>
>>>>>>>>>>>>>>> > Doing these steps will ensure that heal happens only from
>>>>>>>>>>>>>>> updated brick to
>>>>>>>>>>>>>>> > > down brick.
>>>>>>>>>>>>>>> > > 5) gluster v start <> force
>>>>>>>>>>>>>>> > > 6) gluster v heal <>
>>>>>>>>>>>>>>> > >
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> > Will it matter if somewhere in gluster the full heal
>>>>>>>>>>>>>>> command was run other
>>>>>>>>>>>>>>> > day?  Not sure if it eventually stops or times out.
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>> full heal will stop once the crawl is done. So if you want
>>>>>>>>>>>>>>> to trigger heal again,
>>>>>>>>>>>>>>> run gluster v heal <>. Actually even brick up or volume
>>>>>>>>>>>>>>> start force should
>>>>>>>>>>>>>>> trigger the heal.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Did this on test bed today.  its one server with 3 bricks on
>>>>>>>>>>>>>> same machine so take that for what its worth.  also it still runs 3.8.2.
>>>>>>>>>>>>>> Maybe ill update and re-run test.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> killed brick
>>>>>>>>>>>>>> deleted brick dir
>>>>>>>>>>>>>> recreated brick dir
>>>>>>>>>>>>>> created fake dir on gluster mount
>>>>>>>>>>>>>> set suggested fake attribute on it
>>>>>>>>>>>>>> ran volume start <> force
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> looked at files it said needed healing and it was just 8
>>>>>>>>>>>>>> shards that were modified for few minutes I ran through steps
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> gave it few minutes and it stayed same
>>>>>>>>>>>>>> ran gluster volume <> heal
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> it healed all the directories and files you can see over
>>>>>>>>>>>>>> mount including fakedir.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> same issue for shards though.  it adds more shards to heal at
>>>>>>>>>>>>>> glacier pace.  slight jump in speed if I stat every file and dir in VM
>>>>>>>>>>>>>> running but not all shards.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> It started with 8 shards to heal and is now only at 33 out of
>>>>>>>>>>>>>> 800 and probably wont finish adding for few days at rate it goes.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> > >
>>>>>>>>>>>>>>> > > > 1st node worked as expected took 12 hours to heal 1TB
>>>>>>>>>>>>>>> data. Load was
>>>>>>>>>>>>>>> > > little
>>>>>>>>>>>>>>> > > > heavy but nothing shocking.
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > > About an hour after node 1 finished I began same
>>>>>>>>>>>>>>> process on node2. Heal
>>>>>>>>>>>>>>> > > > proces kicked in as before and the files in
>>>>>>>>>>>>>>> directories visible from
>>>>>>>>>>>>>>> > > mount
>>>>>>>>>>>>>>> > > > and .glusterfs healed in short time. Then it began
>>>>>>>>>>>>>>> crawl of .shard adding
>>>>>>>>>>>>>>> > > > those files to heal count at which point the entire
>>>>>>>>>>>>>>> proces ground to a
>>>>>>>>>>>>>>> > > halt
>>>>>>>>>>>>>>> > > > basically. After 48 hours out of 19k shards it has
>>>>>>>>>>>>>>> added 5900 to heal
>>>>>>>>>>>>>>> > > list.
>>>>>>>>>>>>>>> > > > Load on all 3 machnes is negligible. It was suggested
>>>>>>>>>>>>>>> to change this
>>>>>>>>>>>>>>> > > value
>>>>>>>>>>>>>>> > > > to full cluster.data-self-heal-algorithm and restart
>>>>>>>>>>>>>>> volume which I
>>>>>>>>>>>>>>> > > did. No
>>>>>>>>>>>>>>> > > > efffect. Tried relaunching heal no effect, despite any
>>>>>>>>>>>>>>> node picked. I
>>>>>>>>>>>>>>> > > > started each VM and performed a stat of all files from
>>>>>>>>>>>>>>> within it, or a
>>>>>>>>>>>>>>> > > full
>>>>>>>>>>>>>>> > > > virus scan and that seemed to cause short small spikes
>>>>>>>>>>>>>>> in shards added,
>>>>>>>>>>>>>>> > > but
>>>>>>>>>>>>>>> > > > not by much. Logs are showing no real messages
>>>>>>>>>>>>>>> indicating anything is
>>>>>>>>>>>>>>> > > going
>>>>>>>>>>>>>>> > > > on. I get hits to brick log on occasion of null
>>>>>>>>>>>>>>> lookups making me think
>>>>>>>>>>>>>>> > > its
>>>>>>>>>>>>>>> > > > not really crawling shards directory but waiting for a
>>>>>>>>>>>>>>> shard lookup to
>>>>>>>>>>>>>>> > > add
>>>>>>>>>>>>>>> > > > it. I'll get following in brick log but not constant
>>>>>>>>>>>>>>> and sometime
>>>>>>>>>>>>>>> > > multiple
>>>>>>>>>>>>>>> > > > for same shard.
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > > [2016-08-29 08:31:57.478125] W [MSGID: 115009]
>>>>>>>>>>>>>>> > > > [server-resolve.c:569:server_resolve]
>>>>>>>>>>>>>>> 0-GLUSTER1-server: no resolution
>>>>>>>>>>>>>>> > > type
>>>>>>>>>>>>>>> > > > for (null) (LOOKUP)
>>>>>>>>>>>>>>> > > > [2016-08-29 08:31:57.478170] E [MSGID: 115050]
>>>>>>>>>>>>>>> > > > [server-rpc-fops.c:156:server_lookup_cbk]
>>>>>>>>>>>>>>> 0-GLUSTER1-server: 12591783:
>>>>>>>>>>>>>>> > > > LOOKUP (null) (00000000-0000-0000-00
>>>>>>>>>>>>>>> > > > 00-000000000000/241a55ed-f0d5-4dbc-a6ce-ab784a0ba6ff.221)
>>>>>>>>>>>>>>> ==> (Invalid
>>>>>>>>>>>>>>> > > > argument) [Invalid argument]
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > > This one repeated about 30 times in row then nothing
>>>>>>>>>>>>>>> for 10 minutes then
>>>>>>>>>>>>>>> > > one
>>>>>>>>>>>>>>> > > > hit for one different shard by itself.
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > > How can I determine if Heal is actually running? How
>>>>>>>>>>>>>>> can I kill it or
>>>>>>>>>>>>>>> > > force
>>>>>>>>>>>>>>> > > > restart? Does node I start it from determine which
>>>>>>>>>>>>>>> directory gets
>>>>>>>>>>>>>>> > > crawled to
>>>>>>>>>>>>>>> > > > determine heals?
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > > David Gossage
>>>>>>>>>>>>>>> > > > Carousel Checks Inc. | System Administrator
>>>>>>>>>>>>>>> > > > Office 708.613.2284
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > > _______________________________________________
>>>>>>>>>>>>>>> > > > Gluster-users mailing list
>>>>>>>>>>>>>>> > > > Gluster-users at gluster.org
>>>>>>>>>>>>>>> > > > http://www.gluster.org/mailman/listinfo/gluster-users
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > >
>>>>>>>>>>>>>>> > > > _______________________________________________
>>>>>>>>>>>>>>> > > > Gluster-users mailing list
>>>>>>>>>>>>>>> > > > Gluster-users at gluster.org
>>>>>>>>>>>>>>> > > > http://www.gluster.org/mailman/listinfo/gluster-users
>>>>>>>>>>>>>>> > >
>>>>>>>>>>>>>>> > > --
>>>>>>>>>>>>>>> > > Thanks,
>>>>>>>>>>>>>>> > > Anuradha.
>>>>>>>>>>>>>>> > >
>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>> Thanks,
>>>>>>>>>>>>>>> Anuradha.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>
>
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