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 <milos.kozak@xxxxxxxxx <mailto:milos.kozak@xxxxxxxxx>>: 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:/gfs/s3-sata-10k/__fs Brick2: 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-thread-count: 3 cluster.server-quorum-type: server network.remote-dio: enable cluster.eager-lock: enable performance.stat-prefetch: off 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:/gfs/s3-sata-10k/__fs 49152 Y 56631 Brick 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 2049 Y 3386 Self-heal Daemon on 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 Gluster-users@xxxxxxxxxxx <mailto:Gluster-users@xxxxxxxxxxx> http://supercolony.gluster.org/mailman/listinfo/gluster-users -- Best regards, Roman.
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