[Gluster-users] Rebalance failed on Distributed Disperse volume based on 3.12.14 version
Mauro Tridici
mauro.tridici at cmcc.it
Wed Sep 26 17:56:54 UTC 2018
Hi Ashish,
sure, no problem! We are a little bit worried, but we can wait :-)
Thank you very much for your support and your availability.
Regards,
Mauro
> Il giorno 26 set 2018, alle ore 19:33, Ashish Pandey <aspandey at redhat.com> ha scritto:
>
> Hi Mauro,
>
> Yes, I can provide you step by step procedure to correct it.
> Is it fine If i provide you the steps tomorrow as it is quite late over here and I don't want to miss anything in hurry?
>
> ---
> Ashish
>
> From: "Mauro Tridici" <mauro.tridici at cmcc.it>
> To: "Ashish Pandey" <aspandey at redhat.com>
> Cc: "gluster-users" <gluster-users at gluster.org>
> Sent: Wednesday, September 26, 2018 6:54:19 PM
> Subject: Re: [Gluster-users] Rebalance failed on Distributed Disperse volume based on 3.12.14 version
>
>
> Hi Ashish,
>
> in attachment you can find the rebalance log file and the last updated brick log file (the other files in /var/log/glusterfs/bricks directory seem to be too old).
> I just stopped the running rebalance (as you can see at the bottom of the rebalance log file).
> So, if exists a safe procedure to correct the problem I would like execute it.
>
> I don’t know if I can ask you it, but, if it is possible, could you please describe me step by step the right procedure to remove the newly added bricks without losing the data that have been already rebalanced?
>
> The following outputs show the result of “df -h” command executed on one of the first 3 nodes (s01, s02, s03) already existing and on one of the last 3 nodes (s04, s05, s06) added recently.
>
> [root at s06 bricks]# df -h
> File system Dim. Usati Dispon. Uso% Montato su
> /dev/mapper/cl_s06-root 100G 2,1G 98G 3% /
> devtmpfs 32G 0 32G 0% /dev
> tmpfs 32G 4,0K 32G 1% /dev/shm
> tmpfs 32G 26M 32G 1% /run
> tmpfs 32G 0 32G 0% /sys/fs/cgroup
> /dev/mapper/cl_s06-var 100G 2,0G 99G 2% /var
> /dev/mapper/cl_s06-gluster 100G 33M 100G 1% /gluster
> /dev/sda1 1014M 152M 863M 15% /boot
> /dev/mapper/gluster_vgd-gluster_lvd 9,0T 807G 8,3T 9% /gluster/mnt3
> /dev/mapper/gluster_vgg-gluster_lvg 9,0T 807G 8,3T 9% /gluster/mnt6
> /dev/mapper/gluster_vgc-gluster_lvc 9,0T 807G 8,3T 9% /gluster/mnt2
> /dev/mapper/gluster_vge-gluster_lve 9,0T 807G 8,3T 9% /gluster/mnt4
> /dev/mapper/gluster_vgj-gluster_lvj 9,0T 887G 8,2T 10% /gluster/mnt9
> /dev/mapper/gluster_vgb-gluster_lvb 9,0T 807G 8,3T 9% /gluster/mnt1
> /dev/mapper/gluster_vgh-gluster_lvh 9,0T 887G 8,2T 10% /gluster/mnt7
> /dev/mapper/gluster_vgf-gluster_lvf 9,0T 807G 8,3T 9% /gluster/mnt5
> /dev/mapper/gluster_vgi-gluster_lvi 9,0T 887G 8,2T 10% /gluster/mnt8
> /dev/mapper/gluster_vgl-gluster_lvl 9,0T 887G 8,2T 10% /gluster/mnt11
> /dev/mapper/gluster_vgk-gluster_lvk 9,0T 887G 8,2T 10% /gluster/mnt10
> /dev/mapper/gluster_vgm-gluster_lvm 9,0T 887G 8,2T 10% /gluster/mnt12
> tmpfs 6,3G 0 6,3G 0% /run/user/0
>
> [root at s01 ~]# df -h
> File system Dim. Usati Dispon. Uso% Montato su
> /dev/mapper/cl_s01-root 100G 5,3G 95G 6% /
> devtmpfs 32G 0 32G 0% /dev
> tmpfs 32G 39M 32G 1% /dev/shm
> tmpfs 32G 26M 32G 1% /run
> tmpfs 32G 0 32G 0% /sys/fs/cgroup
> /dev/mapper/cl_s01-var 100G 11G 90G 11% /var
> /dev/md127 1015M 151M 865M 15% /boot
> /dev/mapper/cl_s01-gluster 100G 33M 100G 1% /gluster
> /dev/mapper/gluster_vgi-gluster_lvi 9,0T 5,5T 3,6T 61% /gluster/mnt7
> /dev/mapper/gluster_vgm-gluster_lvm 9,0T 5,4T 3,6T 61% /gluster/mnt11
> /dev/mapper/gluster_vgf-gluster_lvf 9,0T 5,7T 3,4T 63% /gluster/mnt4
> /dev/mapper/gluster_vgl-gluster_lvl 9,0T 5,8T 3,3T 64% /gluster/mnt10
> /dev/mapper/gluster_vgj-gluster_lvj 9,0T 5,5T 3,6T 61% /gluster/mnt8
> /dev/mapper/gluster_vgn-gluster_lvn 9,0T 5,4T 3,6T 61% /gluster/mnt12
> /dev/mapper/gluster_vgk-gluster_lvk 9,0T 5,8T 3,3T 64% /gluster/mnt9
> /dev/mapper/gluster_vgh-gluster_lvh 9,0T 5,6T 3,5T 63% /gluster/mnt6
> /dev/mapper/gluster_vgg-gluster_lvg 9,0T 5,6T 3,5T 63% /gluster/mnt5
> /dev/mapper/gluster_vge-gluster_lve 9,0T 5,7T 3,4T 63% /gluster/mnt3
> /dev/mapper/gluster_vgc-gluster_lvc 9,0T 5,6T 3,5T 62% /gluster/mnt1
> /dev/mapper/gluster_vgd-gluster_lvd 9,0T 5,6T 3,5T 62% /gluster/mnt2
> tmpfs 6,3G 0 6,3G 0% /run/user/0
> s01-stg:tier2 420T 159T 262T 38% /tier2
>
> As you can see, used space value of each brick of the last servers is about 800GB.
>
> Thank you,
> Mauro
>
>
>
>
>
>
>
>
> Il giorno 26 set 2018, alle ore 14:51, Ashish Pandey <aspandey at redhat.com <mailto:aspandey at redhat.com>> ha scritto:
>
> Hi Mauro,
>
> rebalance and brick logs should be the first thing we should go through.
>
> There is a procedure to correct the configuration/setup but the situation you are in is difficult to follow that procedure.
> You should have added the bricks hosted on s04-stg, s05-stg and s06-stg the same way you had the previous configuration.
> That means 2 bricks on each node for one subvolume.
> The procedure will require a lot of replace bricks which will again need healing and all. In addition to that we have to wait for re-balance to complete.
>
> I would suggest that if whole data has not been rebalanced and if you can stop the rebalance and remove these newly added bricks properly then you should remove these newly added bricks.
> After that, add these bricks so that you have 2 bricks of each volume on 3 newly added nodes.
>
> Yes, it is like undoing whole effort but it is better to do it now then facing issues in future when it will be almost impossible to correct these things if you have lots of data.
>
> ---
> Ashish
>
>
>
> From: "Mauro Tridici" <mauro.tridici at cmcc.it <mailto:mauro.tridici at cmcc.it>>
> To: "Ashish Pandey" <aspandey at redhat.com <mailto:aspandey at redhat.com>>
> Cc: "gluster-users" <gluster-users at gluster.org <mailto:gluster-users at gluster.org>>
> Sent: Wednesday, September 26, 2018 5:55:02 PM
> Subject: Re: [Gluster-users] Rebalance failed on Distributed Disperse volume based on 3.12.14 version
>
>
> Dear Ashish,
>
> thank you for you answer.
> I could provide you the entire log file related to glusterd, glusterfsd and rebalance.
> Please, could you indicate which one you need first?
>
> Yes, we added the last 36 bricks after creating vol. Is there a procedure to correct this error? Is it still possible to do it?
>
> Many thanks,
> Mauro
>
> Il giorno 26 set 2018, alle ore 14:13, Ashish Pandey <aspandey at redhat.com <mailto:aspandey at redhat.com>> ha scritto:
>
>
> I think we don't have enough logs to debug this so I would suggest you to provide more logs/info.
> I have also observed that the configuration and setup of your volume is not very efficient.
>
> For example:
> Brick37: s04-stg:/gluster/mnt1/brick
> Brick38: s04-stg:/gluster/mnt2/brick
> Brick39: s04-stg:/gluster/mnt3/brick
> Brick40: s04-stg:/gluster/mnt4/brick
> Brick41: s04-stg:/gluster/mnt5/brick
> Brick42: s04-stg:/gluster/mnt6/brick
> Brick43: s04-stg:/gluster/mnt7/brick
> Brick44: s04-stg:/gluster/mnt8/brick
> Brick45: s04-stg:/gluster/mnt9/brick
> Brick46: s04-stg:/gluster/mnt10/brick
> Brick47: s04-stg:/gluster/mnt11/brick
> Brick48: s04-stg:/gluster/mnt12/brick
>
> These 12 bricks are on same node and the sub volume made up of these bricks will be of same subvolume, which is not good. Same is true for the bricks hosted on s05-stg and s06-stg
> I think you have added these bricks after creating vol. The probability of disruption in connection of these bricks will be higher in this case.
>
> ---
> Ashish
>
> From: "Mauro Tridici" <mauro.tridici at cmcc.it <mailto:mauro.tridici at cmcc.it>>
> To: "gluster-users" <gluster-users at gluster.org <mailto:gluster-users at gluster.org>>
> Sent: Wednesday, September 26, 2018 3:38:35 PM
> Subject: [Gluster-users] Rebalance failed on Distributed Disperse volume based on 3.12.14 version
>
> Dear All, Dear Nithya,
>
> after upgrading from 3.10.5 version to 3.12.14, I tried to start a rebalance process to distribute data across the bricks, but something goes wrong.
> Rebalance failed on different nodes and the time value needed to complete the procedure seems to be very high.
>
> [root at s01 ~]# gluster volume rebalance tier2 status
> Node Rebalanced-files size scanned failures skipped status run time in h:m:s
> --------- ----------- ----------- ----------- ----------- ----------- ------------ --------------
> localhost 19 161.6GB 537 2 2 in progress 0:32:23
> s02-stg 25 212.7GB 526 5 2 in progress 0:32:25
> s03-stg 4 69.1GB 511 0 0 in progress 0:32:25
> s04-stg 4 484Bytes 12283 0 3 in progress 0:32:25
> s05-stg 23 484Bytes 11049 0 10 in progress 0:32:25
> s06-stg 3 1.2GB 8032 11 3 failed 0:17:57
> Estimated time left for rebalance to complete : 3601:05:41
> volume rebalance: tier2: success
>
> When rebalance processes fail, I can see the following kind of errors in /var/log/glusterfs/tier2-rebalance.log
>
> Error type 1)
>
> [2018-09-26 08:50:19.872575] W [MSGID: 122053] [ec-common.c:269:ec_check_status] 0-tier2-disperse-10: Operation failed on 2 of 6 subvolumes.(up=111111, mask=100111, remaining=
> 000000, good=100111, bad=011000)
> [2018-09-26 08:50:19.901792] W [MSGID: 122053] [ec-common.c:269:ec_check_status] 0-tier2-disperse-11: Operation failed on 1 of 6 subvolumes.(up=111111, mask=111101, remaining=
> 000000, good=111101, bad=000010)
>
> Error type 2)
>
> [2018-09-26 08:53:31.566836] W [socket.c:600:__socket_rwv] 0-tier2-client-53: readv on 192.168.0.55:49153 failed (Connection reset by peer)
>
> Error type 3)
>
> [2018-09-26 08:57:37.852590] W [MSGID: 122035] [ec-common.c:571:ec_child_select] 0-tier2-disperse-9: Executing operation with some subvolumes unavailable (10)
> [2018-09-26 08:57:39.282306] W [MSGID: 122035] [ec-common.c:571:ec_child_select] 0-tier2-disperse-9: Executing operation with some subvolumes unavailable (10)
> [2018-09-26 09:02:04.928408] W [MSGID: 109023] [dht-rebalance.c:1013:__dht_check_free_space] 0-tier2-dht: data movement of file {blocks:0 name:(/OPA/archive/historical/dts/MRE
> A/Observations/Observations/MREA14/Cs-1/CMCC/raw/CS013.ext)} would result in dst node (tier2-disperse-5:2440190848) having lower disk space than the source node (tier2-dispers
> e-11:71373083776).Skipping file.
>
> Error type 4)
>
> W [rpc-clnt-ping.c:223:rpc_clnt_ping_cbk] 0-tier2-client-7: socket disconnected
>
> Error type 5)
>
> [2018-09-26 09:07:42.333720] W [glusterfsd.c:1375:cleanup_and_exit] (-->/lib64/libpthread.so.0(+0x7e25) [0x7f0417e0ee25] -->/usr/sbin/glusterfs(glusterfs_sigwaiter+0xe5) [0x55
> 90086004b5] -->/usr/sbin/glusterfs(cleanup_and_exit+0x6b) [0x55900860032b] ) 0-: received signum (15), shutting down
>
> Error type 6)
>
> [2018-09-25 08:09:18.340658] C [rpc-clnt-ping.c:166:rpc_clnt_ping_timer_expired] 0-tier2-client-4: server 192.168.0.52:49153 has not responded in the last 42 seconds, disconnecting.
>
> It seems that there are some network or timeout problems, but the network usage/traffic values are not so high.
> Do you think that, in my volume configuration, I have to modify some volume options related to thread and/or network parameters?
> Could you, please, help me to understand the cause of the problems above?
>
> You can find below our volume info:
> (volume is implemented on 6 servers; each server configuration: 2 cpu 10-cores, 64GB RAM, 1 SSD dedicated to the OS, 12 x 10TB HD)
>
> [root at s04 ~]# gluster vol info
>
> Volume Name: tier2
> Type: Distributed-Disperse
> Volume ID: a28d88c5-3295-4e35-98d4-210b3af9358c
> Status: Started
> Snapshot Count: 0
> Number of Bricks: 12 x (4 + 2) = 72
> Transport-type: tcp
> Bricks:
> Brick1: s01-stg:/gluster/mnt1/brick
> Brick2: s02-stg:/gluster/mnt1/brick
> Brick3: s03-stg:/gluster/mnt1/brick
> Brick4: s01-stg:/gluster/mnt2/brick
> Brick5: s02-stg:/gluster/mnt2/brick
> Brick6: s03-stg:/gluster/mnt2/brick
> Brick7: s01-stg:/gluster/mnt3/brick
> Brick8: s02-stg:/gluster/mnt3/brick
> Brick9: s03-stg:/gluster/mnt3/brick
> Brick10: s01-stg:/gluster/mnt4/brick
> Brick11: s02-stg:/gluster/mnt4/brick
> Brick12: s03-stg:/gluster/mnt4/brick
> Brick13: s01-stg:/gluster/mnt5/brick
> Brick14: s02-stg:/gluster/mnt5/brick
> Brick15: s03-stg:/gluster/mnt5/brick
> Brick16: s01-stg:/gluster/mnt6/brick
> Brick17: s02-stg:/gluster/mnt6/brick
> Brick18: s03-stg:/gluster/mnt6/brick
> Brick19: s01-stg:/gluster/mnt7/brick
> Brick20: s02-stg:/gluster/mnt7/brick
> Brick21: s03-stg:/gluster/mnt7/brick
> Brick22: s01-stg:/gluster/mnt8/brick
> Brick23: s02-stg:/gluster/mnt8/brick
> Brick24: s03-stg:/gluster/mnt8/brick
> Brick25: s01-stg:/gluster/mnt9/brick
> Brick26: s02-stg:/gluster/mnt9/brick
> Brick27: s03-stg:/gluster/mnt9/brick
> Brick28: s01-stg:/gluster/mnt10/brick
> Brick29: s02-stg:/gluster/mnt10/brick
> Brick30: s03-stg:/gluster/mnt10/brick
> Brick31: s01-stg:/gluster/mnt11/brick
> Brick32: s02-stg:/gluster/mnt11/brick
> Brick33: s03-stg:/gluster/mnt11/brick
> Brick34: s01-stg:/gluster/mnt12/brick
> Brick35: s02-stg:/gluster/mnt12/brick
> Brick36: s03-stg:/gluster/mnt12/brick
> Brick37: s04-stg:/gluster/mnt1/brick
> Brick38: s04-stg:/gluster/mnt2/brick
> Brick39: s04-stg:/gluster/mnt3/brick
> Brick40: s04-stg:/gluster/mnt4/brick
> Brick41: s04-stg:/gluster/mnt5/brick
> Brick42: s04-stg:/gluster/mnt6/brick
> Brick43: s04-stg:/gluster/mnt7/brick
> Brick44: s04-stg:/gluster/mnt8/brick
> Brick45: s04-stg:/gluster/mnt9/brick
> Brick46: s04-stg:/gluster/mnt10/brick
> Brick47: s04-stg:/gluster/mnt11/brick
> Brick48: s04-stg:/gluster/mnt12/brick
> Brick49: s05-stg:/gluster/mnt1/brick
> Brick50: s05-stg:/gluster/mnt2/brick
> Brick51: s05-stg:/gluster/mnt3/brick
> Brick52: s05-stg:/gluster/mnt4/brick
> Brick53: s05-stg:/gluster/mnt5/brick
> Brick54: s05-stg:/gluster/mnt6/brick
> Brick55: s05-stg:/gluster/mnt7/brick
> Brick56: s05-stg:/gluster/mnt8/brick
> Brick57: s05-stg:/gluster/mnt9/brick
> Brick58: s05-stg:/gluster/mnt10/brick
> Brick59: s05-stg:/gluster/mnt11/brick
> Brick60: s05-stg:/gluster/mnt12/brick
> Brick61: s06-stg:/gluster/mnt1/brick
> Brick62: s06-stg:/gluster/mnt2/brick
> Brick63: s06-stg:/gluster/mnt3/brick
> Brick64: s06-stg:/gluster/mnt4/brick
> Brick65: s06-stg:/gluster/mnt5/brick
> Brick66: s06-stg:/gluster/mnt6/brick
> Brick67: s06-stg:/gluster/mnt7/brick
> Brick68: s06-stg:/gluster/mnt8/brick
> Brick69: s06-stg:/gluster/mnt9/brick
> Brick70: s06-stg:/gluster/mnt10/brick
> Brick71: s06-stg:/gluster/mnt11/brick
> Brick72: s06-stg:/gluster/mnt12/brick
> Options Reconfigured:
> network.ping-timeout: 60
> diagnostics.count-fop-hits: on
> diagnostics.latency-measurement: on
> cluster.server-quorum-type: server
> features.default-soft-limit: 90
> features.quota-deem-statfs: on
> performance.io <http://performance.io/>-thread-count: 16
> disperse.cpu-extensions: auto
> performance.io <http://performance.io/>-cache: off
> network.inode-lru-limit: 50000
> performance.md-cache-timeout: 600
> performance.cache-invalidation: on
> performance.stat-prefetch: on
> features.cache-invalidation-timeout: 600
> features.cache-invalidation: on
> cluster.readdir-optimize: on
> performance.parallel-readdir: off
> performance.readdir-ahead: on
> cluster.lookup-optimize: on
> client.event-threads: 4
> server.event-threads: 4
> nfs.disable: on
> transport.address-family: inet
> cluster.quorum-type: auto
> cluster.min-free-disk: 10
> performance.client-io-threads: on
> features.quota: on
> features.inode-quota: on
> features.bitrot: on
> features.scrub: Active
> cluster.brick-multiplex: on
> cluster.server-quorum-ratio: 51%
>
> If it can help, I paste here the output of “free -m” command executed on all the cluster nodes:
>
> The result is almost the same on every nodes. In your opinion, the available RAM is enough to support data movement?
>
> [root at s06 ~]# free -m
> total used free shared buff/cache available
> Mem: 64309 10409 464 15 53434 52998
> Swap: 65535 103 65432
>
> Thank you in advance.
> Sorry for my long message, but I’m trying to notify you all available information.
>
> Regards,
> Mauro
>
>
>
>
>
>
>
>
>
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>
>
>
>
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-------------------------
Mauro Tridici
Fondazione CMCC
CMCC Supercomputing Center
presso Complesso Ecotekne - Università del Salento -
Strada Prov.le Lecce - Monteroni sn
73100 Lecce IT
http://www.cmcc.it
mobile: (+39) 327 5630841
email: mauro.tridici at cmcc.it <mailto:mauro.tridici at cmcc.it>
https://it.linkedin.com/in/mauro-tridici-5977238b
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