Removing data to speed up from rebalance is not something that is recommended.
(will have to check and skip the files already moved).
Rebalance will take a while, better to let it run. It doesn't have any
down side.
in spite of rebalance running. If you want to speed things up
can be set to aggressive to speed things up. (this might increase the
cpu and disk usage).
Post by Jose SanchezHi All
We were able to get all 4 bricks are distributed , we can see the right
amount of space. but we have been rebalancing since 4 days ago for 16Tb. and
still only 8tb. is there a way to speed up. there is also data we can remove
from it to speed it up, but what is the best procedures removing data , is
it from the Gluster main export point or going on each brick and remove it .
We would like to stop rebalancing , delete the data and rebalancing again.
is there a down side, doing this, What happens with Gluster missing data when rebalancing?
Thanks
Jose
---------------------------------
Jose Sanchez
Systems/Network Analyst 1
Center of Advanced Research Computing
1601 Central Ave.
MSC 01 1190
Albuquerque, NM 87131-0001
carc.unm.edu
575.636.4232
Hi Jose,
Why are all the bricks visible in volume info if the pre-validation
for add-brick failed? I suspect that the remove brick wasn't done
properly.
You can provide the cmd_history.log to verify this. Better to get the
other log messages.
Also I need to know what are the bricks that were actually removed,
the command used and its output.
Looking at the logs , it seems that it is trying to add using the same port
Any Ideas??
Jose
[2018-04-25 22:08:55.169302] I [MSGID: 106482]
Received add brick req
[2018-04-25 22:08:55.186037] I [run.c:191:runner_log]
(-->/usr/lib64/glusterfs/3.8.15/xlator/mgmt/glusterd.so(+0x33045)
[0x7f5464b9b045]
-->/usr/lib64/glusterfs/3.8.15/xlator/mgmt/glusterd.so(+0xcbd85)
[0x7f5464c33d85] -->/lib64/libglusterfs.so.0(runner_log+0x115)
/var/lib/glusterd/hooks/1/add-brick/pre/S28Quota-enable-root-xattr-heal.sh
--volname=scratch --version=1 --volume-op=add-brick
--gd-workdir=/var/lib/glusterd
[2018-04-25 22:08:55.309534] I [MSGID: 106143]
[glusterd-pmap.c:250:pmap_registry_bind] 0-pmap: adding brick
/gdata/brick1/scratch on port 49152
[2018-04-25 22:08:55.309659] I [MSGID: 106143]
[glusterd-pmap.c:250:pmap_registry_bind] 0-pmap: adding brick
/gdata/brick1/scratch.rdma on port 49153
[2018-04-25 22:08:55.310231] E [MSGID: 106005]
[glusterd-utils.c:4877:glusterd_brick_start] 0-management: Unable to start
brick gluster02ib:/gdata/brick1/scratch
[2018-04-25 22:08:55.310275] E [MSGID: 106074]
[glusterd-brick-ops.c:2493:glusterd_op_add_brick] 0-glusterd: Unable to add
bricks
[2018-04-25 22:08:55.310304] E [MSGID: 106123]
[glusterd-mgmt.c:294:gd_mgmt_v3_commit_fn] 0-management: Add-brick commit
failed.
[2018-04-25 22:08:55.310316] E [MSGID: 106123]
[glusterd-mgmt.c:1427:glusterd_mgmt_v3_commit] 0-management: Commit failed
for operation Add brick on local node
[2018-04-25 22:08:55.310330] E [MSGID: 106123]
Commit Op Failed
[2018-04-25 22:09:11.678141] E [MSGID: 106452]
gluster02ib:/gdata/brick1/scratch not available. Brick may be containing or
be contained by an existing brick
[2018-04-25 22:09:11.678184] W [MSGID: 106122]
[glusterd-mgmt.c:188:gd_mgmt_v3_pre_validate_fn] 0-management: ADD-brick
prevalidation failed.
[2018-04-25 22:09:11.678200] E [MSGID: 106122]
Pre Validation failed on operation Add brick
Status of volume: scratch
Gluster process TCP Port RDMA Port Online Pid
------------------------------------------------------------------------------
Brick gluster01ib:/gdata/brick1/scratch 49152 49153 Y
1819
Brick gluster01ib:/gdata/brick2/scratch 49154 49155 Y
1827
Brick gluster02ib:/gdata/brick1/scratch N/A N/A N N/A
Task Status of Volume scratch
------------------------------------------------------------------------------
There are no active volume tasks
Hello Karthik
Im having trouble adding the two bricks back online. Any help is appreciated
thanks
when i try to add-brick command this is what i get
gluster02ib:/gdata/brick2/scratch/
gluster02ib:/gdata/brick2/scratch not available. Brick may be containing or
be contained by an existing brick
I have run the following commands and remove the .glusterfs hidden directories
/gdata/brick2/scratch/
setfattr: /gdata/brick2/scratch/: No such attribute
setfattr: /gdata/brick2/scratch/: No such attribute
this is what I get when I run status and info
Volume Name: scratch
Type: Distribute
Volume ID: 23f1e4b1-b8e0-46c3-874a-58b4728ea106
Status: Started
Snapshot Count: 0
Number of Bricks: 4
Transport-type: tcp,rdma
Brick1: gluster01ib:/gdata/brick1/scratch
Brick2: gluster01ib:/gdata/brick2/scratch
Brick3: gluster02ib:/gdata/brick1/scratch
Brick4: gluster02ib:/gdata/brick2/scratch
nfs.disable: on
performance.readdir-ahead: on
Status of volume: scratch
Gluster process TCP Port RDMA Port Online Pid
------------------------------------------------------------------------------
Brick gluster01ib:/gdata/brick1/scratch 49156 49157 Y
1819
Brick gluster01ib:/gdata/brick2/scratch 49158 49159 Y
1827
Brick gluster02ib:/gdata/brick1/scratch N/A N/A N N/A
Brick gluster02ib:/gdata/brick2/scratch N/A N/A N N/A
Task Status of Volume scratch
------------------------------------------------------------------------------
There are no active volume tasks
This are the logs files from Gluster ETC
[2018-04-25 20:56:54.390662] I [MSGID: 106143]
[glusterd-pmap.c:250:pmap_registry_bind] 0-pmap: adding brick
/gdata/brick1/scratch on port 49152
[2018-04-25 20:56:54.390798] I [MSGID: 106143]
[glusterd-pmap.c:250:pmap_registry_bind] 0-pmap: adding brick
/gdata/brick1/scratch.rdma on port 49153
[2018-04-25 20:56:54.391401] E [MSGID: 106005]
[glusterd-utils.c:4877:glusterd_brick_start] 0-management: Unable to start
brick gluster02ib:/gdata/brick1/scratch
[2018-04-25 20:56:54.391457] E [MSGID: 106074]
[glusterd-brick-ops.c:2493:glusterd_op_add_brick] 0-glusterd: Unable to add
bricks
[2018-04-25 20:56:54.391476] E [MSGID: 106123]
[glusterd-mgmt.c:294:gd_mgmt_v3_commit_fn] 0-management: Add-brick commit
failed.
[2018-04-25 20:56:54.391490] E [MSGID: 106123]
[glusterd-mgmt-handler.c:603:glusterd_handle_commit_fn] 0-management: commit
failed on operation Add brick
[2018-04-25 20:58:55.332262] I [MSGID: 106499]
Received status volume req for volume scratch
[2018-04-25 21:02:07.464357] E [MSGID: 106452]
gluster02ib:/gdata/brick1/scratch not available. Brick may be containing or
be contained by an existing brick
[2018-04-25 21:02:07.464395] W [MSGID: 106122]
[glusterd-mgmt.c:188:gd_mgmt_v3_pre_validate_fn] 0-management: ADD-brick
prevalidation failed.
[2018-04-25 21:02:07.464414] E [MSGID: 106122]
Pre Validation failed on operation Add brick
[2018-04-25 21:04:56.198662] E [MSGID: 106452]
gluster02ib:/gdata/brick2/scratch not available. Brick may be containing or
be contained by an existing brick
[2018-04-25 21:04:56.198700] W [MSGID: 106122]
[glusterd-mgmt.c:188:gd_mgmt_v3_pre_validate_fn] 0-management: ADD-brick
prevalidation failed.
[2018-04-25 21:04:56.198716] E [MSGID: 106122]
Pre Validation failed on operation Add brick
[2018-04-25 21:07:11.084205] I [MSGID: 106482]
Received add brick req
[2018-04-25 21:07:11.087682] E [MSGID: 106452]
gluster02ib:/gdata/brick2/scratch not available. Brick may be containing or
be contained by an existing brick
[2018-04-25 21:07:11.087716] W [MSGID: 106122]
[glusterd-mgmt.c:188:gd_mgmt_v3_pre_validate_fn] 0-management: ADD-brick
prevalidation failed.
[2018-04-25 21:07:11.087729] E [MSGID: 106122]
[glusterd-mgmt.c:884:glusterd_mgmt_v3_pre_validate] 0-management: Pre
Validation failed for operation Add brick on local node
[2018-04-25 21:07:11.087741] E [MSGID: 106122]
Pre Validation Failed
[2018-04-25 21:12:22.340221] E [MSGID: 106452]
gluster02ib:/gdata/brick2/scratch not available. Brick may be containing or
be contained by an existing brick
[2018-04-25 21:12:22.340259] W [MSGID: 106122]
[glusterd-mgmt.c:188:gd_mgmt_v3_pre_validate_fn] 0-management: ADD-brick
prevalidation failed.
[2018-04-25 21:12:22.340274] E [MSGID: 106122]
Pre Validation failed on operation Add brick
[2018-04-25 21:18:13.427036] I [MSGID: 106499]
Received status volume req for volume scratch
---------------------------------
Jose Sanchez
Systems/Network Analyst 1
Center of Advanced Research Computing
1601 Central Ave.
MSC 01 1190
Albuquerque, NM 87131-0001
carc.unm.edu
575.636.4232
Hi Karthik
Looking at the information you have provided me, I would like to make sure
that I’m running the right commands.
1. gluster volume heal scratch info
If the count is non zero, trigger the heal and wait for heal info count to become zero.
2. gluster volume remove-brick scratch replica 1
gluster02ib:/gdata/brick1/scratch gluster02ib:/gdata/brick2/scratch force
3. gluster volume add-brick “#" scratch gluster02ib:/gdata/brick1/scratch
gluster02ib:/gdata/brick2/scratch
Based on the configuration I have, Brick 1 from Node A and B are tide
together and Brick 2 from Node A and B are also tide together. Looking at
your remove command (step #2), it seems that you want me to remove Brick 1
and 2 from Node B (gluster02ib). is that correct? I thought the data was
distributed in bricks 1 between nodes A and B) and duplicated on Bricks 2
(node A and B).
Data is duplicated between bricks 1 of nodes A & B and bricks 2 of nodes A &
B and data is distributed between these two pairs.
You need not always remove the bricks 1 & 2 from node B itself. The idea
here is to keep one copy from both the replica pairs.
Also when I add the bricks back to gluster, do I need to specify if it is
distributed or replicated?? and Do i need a configuration #?? for example on
your command (Step #2) you have “replica 1” when remove bricks, do I need to
do the same when adding the nodes back ?
No. You just need to erase the data on those bricks and add those bricks
back to the volume. The previous remove-brick command will make the volume
plain distribute. Then simply adding the bricks without specifying any "#"
will expand the volume as a plain distribute volue.
Im planning on moving with this changes in few days. At this point each
brick has 14tb and adding bricks 1 from node A and B, i have a total of
28tb, After doing all the process, (removing and adding bricks) I should be
able to see a total of 56Tb right ?
Yes after all these you will have 56TB in total.
After adding the bricks, do volume rebalance, so that the data which were
present previously, will be moved to the correct bricks.
HTH,
Karthik
Thanks
Jose
---------------------------------
Jose Sanchez
Systems/Network Analyst 1
Center of Advanced Research Computing
1601 Central Ave.
MSC 01 1190
Albuquerque, NM 87131-0001
carc.unm.edu
575.636.4232
Hi Jose,
Thanks for providing the volume info. You have 2 subvolumes. Data is
replicated within the bricks of that subvolumes.
First one consisting of Node A's brick1 & Node B's brick1 and the second
one consisting of Node A's brick2 and Node B's brick2.
You don't have the same data on all the 4 bricks. Data are distributed
between these two subvolumes.
To remove the replica you can use the command
gluster volume remove-brick scratch replica 1
gluster02ib:/gdata/brick1/scratch gluster02ib:/gdata/brick2/scratch force
So you will have one copy of data present from both the distributes.
Before doing this make sure "gluster volume heal scratch info" value is
zero. So copies you retain will have the correct data.
After the remove-brick erase the data from the backend.
Then you can expand the volume by following the steps at [1].
[1]
https://docs.gluster.org/en/latest/Administrator%20Guide/Managing%20Volumes/#expanding-volumes
Regards,
Karthik
Hi Karthik
this is our configuration, is 2x2 =4 , they are all replicated , each
brick has 14tb. we have 2 nodes A and B, each one with brick 1 and 2.
Node A (replicated A1 (14tb) and B1 (14tb) ) same with node B
(Replicated A2 (14tb) and B2 (14tb)).
Do you think we need to degrade the node first before removing it. i
believe the same copy of data is on all 4 bricks, we would like to keep one
of them, and add the other bricks as extra space
Thanks for your help on this
Jose
Volume Name: scratch
Type: Distributed-Replicate
Volume ID: 23f1e4b1-b8e0-46c3-874a-58b4728ea106
Status: Started
Snapshot Count: 0
Number of Bricks: 2 x 2 = 4
Transport-type: tcp,rdma
Brick1: gluster01ib:/gdata/brick1/scratch
Brick2: gluster02ib:/gdata/brick1/scratch
Brick3: gluster01ib:/gdata/brick2/scratch
Brick4: gluster02ib:/gdata/brick2/scratch
performance.readdir-ahead: on
nfs.disable: on
Status of volume: scratch
Gluster process TCP Port RDMA Port Online
Pid
------------------------------------------------------------------------------
Brick gluster01ib:/gdata/brick1/scratch 49152 49153 Y
1743
Brick gluster02ib:/gdata/brick1/scratch 49156 49157 Y
1732
Brick gluster01ib:/gdata/brick2/scratch 49154 49155 Y
1738
Brick gluster02ib:/gdata/brick2/scratch 49158 49159 Y
1733
Self-heal Daemon on localhost N/A N/A Y
1728
Self-heal Daemon on gluster02ib N/A N/A Y
1726
Task Status of Volume scratch
------------------------------------------------------------------------------
There are no active volume tasks
---------------------------------
Jose Sanchez
Systems/Network Analyst 1
Center of Advanced Research Computing
1601 Central Ave.
MSC 01 1190
Albuquerque, NM 87131-0001
carc.unm.edu
575.636.4232
Hi Jose,
By switching into pure distribute volume you will lose availability if something goes bad.
I am guessing you have a nX2 volume.
If you want to preserve one copy of the data in all the distributes, you
can do that by decreasing the replica count in the remove-brick operation.
If you have any inconsistency, heal them first using the "gluster volume
heal <volname>" command and wait till the
"gluster volume heal <volname> info" output becomes zero, before removing
the bricks, so that you will have the correct data.
If you do not want to preserve the data then you can directly remove the bricks.
Even after removing the bricks the data will be present in the backend of
the removed bricks. You have to manually erase them (both data and
.glusterfs folder).
See [1] for more details on remove-brick.
[1].
https://docs.gluster.org/en/latest/Administrator%20Guide/Managing%20Volumes/#shrinking-volumes
HTH,
Karthik
We have a Gluster setup with 2 nodes (distributed replication) and we
would like to switch it to the distributed mode. I know the data is
duplicated between those nodes, what is the proper way of switching it to a
distributed, we would like to double or gain the storage space on our
gluster storage node. what happens with the data, do i need to erase one of
the nodes?
Jose
---------------------------------
Jose Sanchez
Systems/Network Analyst
Center of Advanced Research Computing
1601 Central Ave.
MSC 01 1190
Albuquerque, NM 87131-0001
carc.unm.edu
575.636.4232
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Regards,
Hari Gowtham.