[Gluster-users] Rebalance failed on Distributed Disperse volume based on 3.12.14 version
Ashish Pandey
aspandey at redhat.com
Thu Sep 27 10:38:25 UTC 2018
Hi Mauro,
We can divide the 36 newly added bricks into 6 set of 6 bricks each starting from brick37.
That means, there are 6 ec subvolumes and we have to deal with one sub volume at a time.
I have named it V1 to V6.
Problem:
Take the case of V1.
The best configuration/setup would be to have all the 6 bricks of V1 on 6 different nodes.
However, in your case you have added 3 new nodes. So, at least we should have 2 bricks on 3 different newly added nodes.
This way, in 4+2 EC configuration, even if one node goes down you will have 4 other bricks of that volume and the data on that volume would be accessible.
In current setup if s04-stg goes down, you will loose all the data on V1 and V2 as all the bricks will be down. We want to avoid and correct it.
Now, we can have two approach to correct/modify this setup.
Approach 1
We have to remove all the newly added bricks in a set of 6 bricks. This will trigger re- balance and move whole data to other sub volumes.
Repeat the above step and then once all the bricks are removed, add those bricks again in a set of 6 bricks, this time have 2 bricks from each of the 3 newly added Nodes.
While this is a valid and working approach, I personally think that this will take long time and also require lot of movement of data.
Approach 2
In this approach we can use the heal process. We have to deal with all the volumes (V1 to V6) one by one. Following are the steps for V1-
Step 1 -
Use replace-brick command to move following bricks on s05-stg node one by one (heal should be completed after every replace brick command)
Brick39: s04-stg:/gluster/mnt3/brick to s05-stg/<brick which is free>
Brick40: s04-stg:/gluster/mnt4/brick to s05-stg/<other brick which is free>
Command :
gluster v replace-brick <volname> s04-stg:/gluster/mnt3/brick s05-stg:/<brick which is free> commit force
Try to give names to the bricks so that you can identify which 6 bricks belongs to same ec subvolume
Use replace-brick command to move following bricks on s06-stg node one by one
Brick41: s04-stg:/gluster/mnt5/brick to s06-stg/<brick which is free>
Brick42: s04-stg:/gluster/mnt6/brick to s06-stg/<other brick which is free>
Step 2 - After, every replace-brick command, you have to wait for heal to be completed.
check "gluster v heal <volname> info " if it shows any entry you have to wait for it to be completed.
After successful step 1 and step 2, setup for sub volume V1 will be fixed. The same steps you have to perform for other volumes. Only thing is that
the nodes would be different on which you have to move the bricks.
V1
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
V2
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
V3
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
V4
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
V5
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
V6
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
Just a note that these steps need movement of data.
Be careful while performing these steps and do one replace brick at a time and only after heal completion go to next.
Let me know if you have any issues.
---
Ashish
----- Original Message -----
From: "Mauro Tridici" <mauro.tridici at cmcc.it>
To: "Ashish Pandey" <aspandey at redhat.com>
Cc: "gluster-users" <gluster-users at gluster.org>
Sent: Thursday, September 27, 2018 4:03:04 PM
Subject: Re: [Gluster-users] Rebalance failed on Distributed Disperse volume based on 3.12.14 version
Dear Ashish,
I hope I don’t disturb you so much, but I would like to ask you if you had some time to dedicate to our problem.
Please, forgive my insistence.
Thank you in advance,
Mauro
Il giorno 26 set 2018, alle ore 19:56, Mauro Tridici < mauro.tridici at cmcc.it > ha scritto:
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
<blockquote>
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
----- Original Message -----
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
<blockquote>
Il giorno 26 set 2018, alle ore 14:51, Ashish Pandey < 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
----- Original Message -----
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 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
<blockquote>
Il giorno 26 set 2018, alle ore 14:13, Ashish Pandey < 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
----- Original Message -----
From: "Mauro Tridici" < mauro.tridici at cmcc.it >
To: "gluster-users" < 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 -thread-count: 16
disperse.cpu-extensions: auto
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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</blockquote>
_______________________________________________
Gluster-users mailing list
Gluster-users at gluster.org
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</blockquote>
-------------------------
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
https://it.linkedin.com/in/mauro-tridici-5977238b
</blockquote>
-------------------------
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
https://it.linkedin.com/in/mauro-tridici-5977238b
_______________________________________________
Gluster-users mailing list
Gluster-users at gluster.org
https://lists.gluster.org/mailman/listinfo/gluster-users
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