[Gluster-users] Rebalancing newly added bricks
Herb Burnswell
herbert.burnswell at gmail.com
Fri Sep 13 19:54:46 UTC 2019
Hi,
Well our rebalance seems to have failed. Here is the output:
# gluster vol rebalance tank status
Node Rebalanced-files size
scanned failures skipped status run time in
h:m:s
--------- ----------- -----------
----------- ----------- ----------- ------------
--------------
localhost 1348706 57.8TB
2234439 9 6 failed 190:24:3
serverB 0
0Bytes 7 0 0 completed
63:47:55
volume rebalance: tank: success
# gluster vol status tank
Status of volume: tank
Gluster process TCP Port RDMA Port Online Pid
------------------------------------------------------------------------------
Brick serverA:/gluster_bricks/data1 49162 0 Y 20318
Brick serverB:/gluster_bricks/data1 49166 0 Y 3432
Brick serverA:/gluster_bricks/data2 49163 0 Y 20323
Brick serverB:/gluster_bricks/data2 49167 0 Y 3435
Brick serverA:/gluster_bricks/data3 49164 0 Y 4625
Brick serverA:/gluster_bricks/data4 49165 0 Y 4644
Brick serverA:/gluster_bricks/data5 49166 0 Y 5088
Brick serverA:/gluster_bricks/data6 49167 0 Y 5128
Brick serverB:/gluster_bricks/data3 49168 0 Y 22314
Brick serverB:/gluster_bricks/data4 49169 0 Y 22345
Brick serverB:/gluster_bricks/data5 49170 0 Y 22889
Brick serverB:/gluster_bricks/data6 49171 0 Y 22932
Self-heal Daemon on localhost N/A N/A Y
6202
Self-heal Daemon on serverB N/A N/A Y 22981
Task Status of Volume tank
------------------------------------------------------------------------------
Task : Rebalance
ID : eec64343-8e0d-4523-ad05-5678f9eb9eb2
Status : failed
# df -hP |grep data
/dev/mapper/gluster_vg-gluster_lv1_data 60T 31T 29T 52%
/gluster_bricks/data1
/dev/mapper/gluster_vg-gluster_lv2_data 60T 31T 29T 51%
/gluster_bricks/data2
/dev/mapper/gluster_vg-gluster_lv3_data 60T 15T 46T 24%
/gluster_bricks/data3
/dev/mapper/gluster_vg-gluster_lv4_data 60T 15T 46T 24%
/gluster_bricks/data4
/dev/mapper/gluster_vg-gluster_lv5_data 60T 15T 45T 25%
/gluster_bricks/data5
/dev/mapper/gluster_vg-gluster_lv6_data 60T 15T 45T 25%
/gluster_bricks/data6
The rebalance log on serverA shows a disconnect from serverB
[2019-09-08 15:41:44.285591] C
[rpc-clnt-ping.c:160:rpc_clnt_ping_timer_expired] 0-tank-client-10: server
<serverB>:49170 has not responded in the last 42 seconds, disconnecting.
[2019-09-08 15:41:44.285739] I [MSGID: 114018]
[client.c:2280:client_rpc_notify] 0-tank-client-10: disconnected from
tank-client-10. Client process will keep trying to connect to glusterd
until brick's port is available
[2019-09-08 15:41:44.286023] E [rpc-clnt.c:365:saved_frames_unwind] (-->
/lib64/libglusterfs.so.0(_gf_log_callingfn+0x192)[0x7ff986e8b132] (-->
/lib64/libgfrpc.so.0(saved_frames_unwind+0x1de)[0x7ff986c5299e] (-->
/lib64/libgfrpc.so.0(saved_frames_destroy+0xe)[0x7ff986c52aae] (-->
/lib64/libgfrpc.so.0(rpc_clnt_connection_cleanup+0x90)[0x7ff986c54220] (-->
/lib64/libgfrpc.so.0(rpc_clnt_notify+0x2b0)[0x7ff986c54ce0] )))))
0-tank-client-10: forced unwinding frame type(GlusterFS 3.3)
op(FXATTROP(34)) called at 2019-09-08 15:40:44.040333 (xid=0x7f8cfac)
Does this type of failure cause data corruption? What is the best course
of action at this point?
Thanks,
HB
On Wed, Sep 11, 2019 at 11:58 PM Strahil <hunter86_bg at yahoo.com> wrote:
> Hi Nithya,
>
> Thanks for the detailed explanation.
> It makes sense.
>
> Best Regards,
> Strahil Nikolov
> On Sep 12, 2019 08:18, Nithya Balachandran <nbalacha at redhat.com> wrote:
>
>
>
> On Wed, 11 Sep 2019 at 09:47, Strahil <hunter86_bg at yahoo.com> wrote:
>
> Hi Nithya,
>
> I just reminded about your previous e-mail which left me with the
> impression that old volumes need that.
> This is the one 1 mean:
>
> >It looks like this is a replicate volume. If >that is the case then yes,
> you are >running an old version of Gluster for >which this was the default
>
>
> Hi Strahil,
>
> I'm providing a little more detail here which I hope will explain things.
> Rebalance was always a volume wide operation - a *rebalance start*
> operation will start rebalance processes on all nodes of the volume.
> However, different processes would behave differently. In earlier releases,
> all nodes would crawl the bricks and update the directory layouts. However,
> only one node in each replica/disperse set would actually migrate files,so
> the rebalance status would only show one node doing any "work" (scanning,
> rebalancing etc). However, this one node will process all the files in its
> replica sets. Rerunning rebalance on other nodes would make no difference
> as it will always be the same node that ends up migrating files.
> So for instance, for a replicate volume with server1:/brick1,
> server2:/brick2 and server3:/brick3 in that order, only the rebalance
> process on server1 would migrate files. In newer releases, all 3 nodes
> would migrate files.
>
> The rebalance status does not capture the directory operations of fixing
> layouts which is why it looks like the other nodes are not doing anything.
>
> Hope this helps.
>
> Regards,
> Nithya
>
> behaviour.
>
> >
> >
>
> >Regards,
>
> >
>
> >Nithya
>
>
> Best Regards,
> Strahil Nikolov
> On Sep 9, 2019 06:36, Nithya Balachandran <nbalacha at redhat.com> wrote:
>
>
>
> On Sat, 7 Sep 2019 at 00:03, Strahil Nikolov <hunter86_bg at yahoo.com>
> wrote:
>
> As it was mentioned, you might have to run rebalance on the other node -
> but it is better to wait this node is over.
>
>
> Hi Strahil,
>
> Rebalance does not need to be run on the other node - the operation is a
> volume wide one . Only a single node per replica set would migrate files in
> the version used in this case .
>
> Regards,
> Nithya
>
> Best Regards,
> Strahil Nikolov
>
> В петък, 6 септември 2019 г., 15:29:20 ч. Гринуич+3, Herb Burnswell <
> herbert.burnswell at gmail.com>
>
>
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