What I can see in gluster logs is that connection between two peers was lost. The physical connection, however, worked all the time.
Dne 5.9.2014 0:47, Joe Julian napsal(a):
That is about as far removed from anything useful for troubleshooting as possible. You're reporting a symptom from within a virtualized environment. It's the real systems that have the useful logs. Any errors on the client or brick logs? Libvirt logs? dmesg on the server? Is either cpu bound? In swap?On September 4, 2014 9:12:16 PM PDT, "Miloš Kozák" <[email protected]> wrote:Hi, I ran few more tests. I moved a file which is an VM image onto GlusterFS mount and along the load I got this on console of running VM: lost page write due to I/O error on vda1 Buffer I/O error on device vda1, logical block 1049638 lost page write due to I/O error on vda1 Buffer I/O error on device vda1, logical block 1049646 lost page write due to I/O error on vda1 Buffer I/O error on device vda1, logical block 1049647 lost page write due to I/O error on vda1 Buffer I/O error on device vda1, logical block 1049649 lost page write due to I/O error on vda1 end_request: I/O error, dev vda, sector 8399688 end_request: I/O error, dev vda, sector 8399728 end_request: I/O error, dev vda, sector 8399736 end_request: I/O error, dev vda, sector 8399776 end_request: I/O error, dev vda, sector 8399792 __ratelimit: 5 callbacks suppressed EXT4-fs error (device vda1): ext4_find_entry: reading directory #398064 offset 0 EXT4-fs error (device vda1): ext4_find_entry: reading directory #398064 offset 0 EXT4-fs error (device vda1): ext4_find_entry: reading directory #132029 offset 0 Do you think it is related to options which are set to the volume? storage.owner-gid: 498 storage.owner-uid: 498 network.ping-timeout: 2 performance.io <http://performance.io>-thread-count: 3 cluster.server-quorum-type: server network.remote-dio: enable cluster.eager-lock: enable performance.stat-prefetch: off performance.io <http://performance.io>-cache: off performance.read-ahead: off performance.quick-read: off Thanks Milos Dne 14-09-03 v 04:01 PM Milos Kozak napsal(a): I have just tried to copy an VM image (raw) and causes the same problem. I have GlusterFS 3.5.2 On 9/3/2014 9:14 AM, Roman wrote: Hi, I had some issues with files generated from /dev/zero also. try real files or /dev/urandom :) I don't know, if there is a real issue/bug with files generated from /dev/zero ? Devs should check them out /me thinks. 2014-09-03 16:11 GMT+03:00 Milos Kozak <[email protected] <mailto:[email protected]>>: Hi, I am facing a quite strange problem when I do have two servers with the same configuration and the same hardware. Servers are connected by bonded 1GE. I have one volume: [root@nodef02i 103]# gluster volume info Volume Name: ph-fs-0 Type: Replicate Volume ID: f8f569ea-e30c-43d0-bb94-__b2f1164a7c9a Status: Started Number of Bricks: 1 x 2 = 2 Transport-type: tcp Bricks: Brick1: 10.11.100.1 <http://10.11.100.1>:/gfs/s3-sata-10k/__fs Brick2: 10.11.100.2 <http://10.11.100.2>:/gfs/s3-sata-10k/__fs Options Reconfigured: storage.owner-gid: 498 storage.owner-uid: 498 network.ping-timeout: 2 performance.io <http://performance.io>-thread-count: 3 cluster.server-quorum-type: server network.remote-dio: enable cluster.eager-lock: enable performance.stat-prefetch: off performance.io <http://performance.io>-cache: off performance.read-ahead: off performance.quick-read: off Intended to host virtual servers (KVM), the configuration is according to the gluster blog. Currently I have got only one virtual server deployed on top of this volume in order to see effects of my stress tests. During the tests I write to the volume mounted through FUSE by dd (currently on one writing at a moment): dd if=/dev/zero of=test2.img bs=1M count=20000 conv=fdatasync Test 1) I run dd on nodef02i. Load on nodef02i is max 1erl but on the nodef01i around 14erl (I do have 12threads CPU). After the write is done the load on nodef02i goes down, but the load goes up to 28erl on nodef01i. 20minutes it stays the same. In the mean time I can see: [root@nodef01i 103]# gluster volume heal ph-fs-0 info Volume ph-fs-0 is not started (Or) All the bricks are not running. Volume heal failed [root@nodef02i 103]# gluster volume heal ph-fs-0 info Brick nodef01i.czprg:/gfs/s3-sata-__10k/fs/ /__3706a2cb0bb27ba5787b3c12388f4e__bb - Possibly undergoing heal /test.img - Possibly undergoing heal Number of entries: 2 Brick nodef02i.czprg:/gfs/s3-sata-__10k/fs/ /__3706a2cb0bb27ba5787b3c12388f4e__bb - Possibly undergoing heal /test.img - Possibly undergoing heal Number of entries: 2 [root@nodef01i 103]# gluster volume status Status of volume: ph-fs-0 Gluster process Port Online Pid ------------------------------------------------------------------------ Brick 10.11.100.1 <http://10.11.100.1>:/gfs/s3-sata-10k/__fs 49152 Y 56631 Brick 10.11.100.2 <http://10.11.100.2>:/gfs/s3-sata-10k/__fs 49152 Y 3372 NFS Server on localhost 2049 Y 56645 Self-heal Daemon on localhost N/A Y 56649 NFS Server on 10.11.100.2 <http://10.11.100.2> 2049 Y 3386 Self-heal Daemon on 10.11.100.2 <http://10.11.100.2> N/A Y 3387 Task Status of Volume ph-fs-0 ------------------------------------------------------------------------ There are no active volume tasks This very high load takes another 20-30minutes. During the first test I restarted glusterd service after 10minutes because everything seemed to me that the service does not work, but I could see very high load on the nodef01i. Consequently, the virtual server yields errors about problems with EXT4 filesystem - MySQL stops. When the load culminated I tried to run the same test but from opposite direction. I wrote (dd) from nodef01i - test2. Happened more or less the same. I gained extremely high load on nodef01i and minimal load on nodef02i. Outputs from heal were more or less the same.. I would like to tweak this but I don´t know what I should focus on. Thank you for help. Milos ------------------------------------------------------------------------ Gluster-users mailing list [email protected] <mailto:[email protected]> http://supercolony.gluster.org/mailman/listinfo/gluster-users-- Best regards, Roman.------------------------------------------------------------------------ Gluster-users mailing list [email protected]http://supercolony.gluster.org/mailman/listinfo/gluster-users------------------------------------------------------------------------ Gluster-users mailing list [email protected] http://supercolony.gluster.org/mailman/listinfo/gluster-users --Sent from my Android device with K-9 Mail. Please excuse my brevity.
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