<html><head><meta http-equiv="content-type" content="text/html; charset=UTF-8"><style>body { line-height: 1.5; }blockquote { margin-top: 0px; margin-bottom: 0px; margin-left: 0.5em; }body { font-size: 10.5pt; font-family: 'Microsoft YaHei UI'; color: rgb(0, 0, 0); line-height: 1.5; }</style></head><body>
<div><span></span>Hi Susant,</div><div> Thank you for your advice. I have set that parameter and started again in lazy mode. I think maybe it will not fail again this time because every time it fails it happens after migration started. Another important thing is fix-layout rebalance which is without migration can complete after running for 25 hours.</div><div><br></div><div> And, I can't grep any errors in the rebalance log file using "grep ' E ' FastVol-rebalance.log".</div>
<div><br></div><div> Thank you.</div><hr style="width: 210px; height: 1px;" color="#b5c4df" size="1" align="left">
<div><span><div style="MARGIN: 10px; FONT-FAMILY: verdana; FONT-SIZE: 10pt"><div>PuYun</div></div></span></div>
<blockquote style="margin-top: 0px; margin-bottom: 0px; margin-left: 0.5em;"><div> </div><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm"><div style="PADDING-RIGHT: 8px; PADDING-LEFT: 8px; FONT-SIZE: 12px;FONT-FAMILY:tahoma;COLOR:#000000; BACKGROUND: #efefef; PADDING-BOTTOM: 8px; PADDING-TOP: 8px"><div><b>From:</b> <a href="mailto:spalai@redhat.com">Susant Palai</a></div><div><b>Date:</b> 2015-12-15 15:21</div><div><b>To:</b> <a href="mailto:cloudor@126.com">PuYun</a></div><div><b>CC:</b> <a href="mailto:gluster-users@gluster.org">gluster-users</a></div><div><b>Subject:</b> Re: [Gluster-users] How to diagnose volume rebalance failure?</div></div></div><div><div>Hi PuYun,</div>
<div> We need to figure out some mechanism to get the huge log files. Until then here is something I can think can be reason that can affect the performance.</div>
<div> </div>
<div>The rebalance normally starts in medium level [performance wise] which means for you in this case will generate two threads for migration which can hog on those 2 cores. In case you run rebalance again, run it in lazy mode. Here is the command.</div>
<div> </div>
<div>"gluster v set <VOLUME-NAME> rebal-throttle lazy". This should spawn just one thread for migration.</div>
<div> </div>
<div>For logs: Can you grep for errors in the rebalance log file and upload? <till we figure out a method to get full logs></div>
<div> </div>
<div>Thanks,</div>
<div>Susant</div>
<div> </div>
<div>----- Original Message -----</div>
<div>From: "PuYun" <cloudor@126.com></div>
<div>To: "gluster-users" <gluster-users@gluster.org></div>
<div>Sent: Tuesday, 15 December, 2015 5:51:00 AM</div>
<div>Subject: Re: [Gluster-users] How to diagnose volume rebalance failure?</div>
<div> </div>
<div> </div>
<div> </div>
<div>Hi, </div>
<div> </div>
<div> </div>
<div>Another weird piece of infomation may be useful. The failed task had actually been running for hours, but the status command output only 3621 sec. </div>
<div> </div>
<div> </div>
<div>============== shell ============== </div>
<div>[root@d001 glusterfs]# gluster volume rebalance FastVol status </div>
<div>Node Rebalanced-files size scanned failures skipped status run time in secs </div>
<div>--------- ----------- ----------- ----------- ----------- ----------- ------------ -------------- </div>
<div>localhost 0 0Bytes 952767 0 0 failed 3621.00 </div>
<div>volume rebalance: FastVol: success: </div>
<div> </div>
<div>================================ </div>
<div> </div>
<div> </div>
<div>As you can see, I started rebalance task for only 1 time. </div>
<div>======== cmd_history.log-20151215 ====== </div>
<div>[2015-12-14 12:50:41.443937] : volume start FastVol : SUCCESS </div>
<div>[2015-12-14 12:55:01.367519] : volume rebalance FastVol start : SUCCESS </div>
<div>[2015-12-14 13:55:22.132199] : volume rebalance FastVol status : SUCCESS </div>
<div>[2015-12-14 23:04:01.780885] : volume rebalance FastVol status : SUCCESS </div>
<div>[2015-12-14 23:35:56.708077] : volume rebalance FastVol status : SUCCESS </div>
<div> </div>
<div>================================= </div>
<div> </div>
<div> </div>
<div>Because the task failed at [ 2015-12-14 21:46:54.179xx], something wrong might happened at 3621 secs before, that is [ 2015-12-14 20:46:33.179xx]. I check logs at that time, found nothing special. </div>
<div>========== FastVol-rebalance.log ======== </div>
<div>[2015-12-14 20:46:33.166748] I [dht-rebalance.c:1010:dht_migrate_file] 0-FastVol-dht: /for_ybest_fsdir/user/Weixin.oClDcjjJ/rH/wV/mNv6sX94lypFWdvM/userPoint: attempting to move from FastVol-client-0 to FastVol-client-1 </div>
<div>[2015-12-14 20:46:33.171009] I [MSGID: 109022] [dht-rebalance.c:1290:dht_migrate_file] 0-FastVol-dht: completed migration of /for_ybest_fsdir/user/Weixin.oClDcjjJ/t2/n1/VSXZlm65KjfhbgoM/flag_finished from subvolume FastVol-client-0 to FastVol-client-1 </div>
<div>[2015-12-14 20:46:33.174851] I [dht-rebalance.c:1010:dht_migrate_file] 0-FastVol-dht: /for_ybest_fsdir/user/Weixin.oClDcjjJ/rH/wV/mNv6sX94lypFWdvM/portrait_origin.jpg: attempting to move from FastVol-client-0 to FastVol-client-1 </div>
<div>[2015-12-14 20:46:33.181448] I [MSGID: 109022] [dht-rebalance.c:1290:dht_migrate_file] 0-FastVol-dht: completed migration of /for_ybest_fsdir/user/Weixin.oClDcjjJ/rH/wV/mNv6sX94lypFWdvM/userPoint from subvolume FastVol-client-0 to FastVol-client-1 </div>
<div>[2015-12-14 20:46:33.184996] I [dht-rebalance.c:1010:dht_migrate_file] 0-FastVol-dht: /for_ybest_fsdir/user/Weixin.oClDcjjJ/rH/wV/mNv6sX94lypFWdvM/portrait_small.jpg: attempting to move from FastVol-client-0 to FastVol-client-1 </div>
<div>[2015-12-14 20:46:33.191681] I [MSGID: 109022] [dht-rebalance.c:1290:dht_migrate_file] 0-FastVol-dht: completed migration of /for_ybest_fsdir/user/Weixin.oClDcjjJ/rH/wV/mNv6sX94lypFWdvM/portrait_origin.jpg from subvolume FastVol-client-0 to FastVol-client-1 </div>
<div>[2015-12-14 20:46:33.195396] I [dht-rebalance.c:1010:dht_migrate_file] 0-FastVol-dht: /for_ybest_fsdir/user/Weixin.oClDcjjJ/rH/wV/mNv6sX94lypFWdvM/portrait_big_square.jpg: attempting to move from FastVol-client-0 to FastVol-client-1 </div>
<div> </div>
<div>================================== </div>
<div> </div>
<div> </div>
<div>And, there is no logs around at [ 2015-12-14 20:46:33.179xx ] in mnt-b1-brick.log, mnt-c1-brick.log and etc-glusterfs-glusterd.vol.log. </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div>PuYun </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div>From: PuYun </div>
<div>Date: 2015-12-15 07:30 </div>
<div>To: gluster-users </div>
<div>Subject: Re: [Gluster-users] How to diagnose volume rebalance failure? </div>
<div> </div>
<div> </div>
<div>Hi, </div>
<div> </div>
<div> </div>
<div>Failed again. I can see disconnections in logs, but no more details. </div>
<div> </div>
<div> </div>
<div>=========== mnt-b1-brick.log =========== </div>
<div>[2015-12-14 21:46:54.179662] I [MSGID: 115036] [server.c:552:server_rpc_notify] 0-FastVol-server: disconnecting connection from d001-1799-2015/12/14-12:54:56:347561-FastVol-client-1-0-0 </div>
<div>[2015-12-14 21:46:54.181764] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on / </div>
<div>[2015-12-14 21:46:54.181815] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on /for_ybest_fsdir </div>
<div>[2015-12-14 21:46:54.181856] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on /for_ybest_fsdir/user </div>
<div>[2015-12-14 21:46:54.181918] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on /for_ybest_fsdir/user/ji/ay/up/a19640529/linkwrap/129836/0.jpg </div>
<div>[2015-12-14 21:46:54.181961] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on /for_ybest_fsdir/user/ji/ay/an </div>
<div>[2015-12-14 21:46:54.182003] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on /for_ybest_fsdir/user/ji/ay/up/a19640529/linkwrap/129836/icon_loading_white22c04a.gif </div>
<div>[2015-12-14 21:46:54.182036] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on /for_ybest_fsdir/user/ji </div>
<div>[2015-12-14 21:46:54.182076] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on /for_ybest_fsdir/user/ji/ay </div>
<div>[2015-12-14 21:46:54.182110] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on /for_ybest_fsdir/user/ji/ay/an/ling00 </div>
<div>[2015-12-14 21:46:54.182203] I [MSGID: 101055] [client_t.c:419:gf_client_unref] 0-FastVol-server: Shutting down connection d001-1799-2015/12/14-12:54:56:347561-FastVol-client-1-0-0 </div>
<div> </div>
<div>====================================== </div>
<div> </div>
<div> </div>
<div>============== mnt-c1-brick.log -============ </div>
<div>[2015-12-14 21:46:54.179597] I [MSGID: 115036] [server.c:552:server_rpc_notify] 0-FastVol-server: disconnecting connection from d001-1799-2015/12/14-12:54:56:347561-FastVol-client-0-0-0 </div>
<div>[2015-12-14 21:46:54.180428] W [inodelk.c:404:pl_inodelk_log_cleanup] 0-FastVol-server: releasing lock on 5e300cdb-7298-44c0-90eb-5b50018daed6 held by {client=0x7effc810cce0, pid=-3 lk-owner=fdffffff} </div>
<div>[2015-12-14 21:46:54.180454] W [inodelk.c:404:pl_inodelk_log_cleanup] 0-FastVol-server: releasing lock on 3c9a1cd5-84c8-4967-98d5-e75a402b1f74 held by {client=0x7effc810cce0, pid=-3 lk-owner=fdffffff} </div>
<div>[2015-12-14 21:46:54.180483] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on / </div>
<div>[2015-12-14 21:46:54.180525] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on /for_ybest_fsdir </div>
<div>[2015-12-14 21:46:54.180570] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on /for_ybest_fsdir/user </div>
<div>[2015-12-14 21:46:54.180604] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on /for_ybest_fsdir/user/ji/ay/up/a19640529/linkwrap/129836/0.jpg </div>
<div>[2015-12-14 21:46:54.180634] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on /for_ybest_fsdir/user/ji </div>
<div>[2015-12-14 21:46:54.180678] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on /for_ybest_fsdir/user/ji/ay </div>
<div>[2015-12-14 21:46:54.180725] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on /for_ybest_fsdir/user/ji/ay/an/ling00 </div>
<div>[2015-12-14 21:46:54.180779] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on /for_ybest_fsdir/user/ji/ay/up/a19640529/linkwrap/129836/icon_loading_white22c04a.gif </div>
<div>[2015-12-14 21:46:54.180820] I [MSGID: 115013] [server-helpers.c:294:do_fd_cleanup] 0-FastVol-server: fd cleanup on /for_ybest_fsdir/user/ji/ay/an </div>
<div>[2015-12-14 21:46:54.180859] I [MSGID: 101055] [client_t.c:419:gf_client_unref] 0-FastVol-server: Shutting down connection d001-1799-2015/12/14-12:54:56:347561-FastVol-client-0-0-0 </div>
<div> </div>
<div>====================================== </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div>============== etc-glusterfs-glusterd.vol.log ========== </div>
<div>[2015-12-14 21:46:54.179819] W [socket.c:588:__socket_rwv] 0-management: readv on /var/run/gluster/gluster-rebalance-dbee250a-e3fe-4448-b905-b76c5ba80b25.sock failed (No data available) </div>
<div>[2015-12-14 21:46:54.209586] I [MSGID: 106007] [glusterd-rebalance.c:162:__glusterd_defrag_notify] 0-management: Rebalance process for volume FastVol has disconnected. </div>
<div>[2015-12-14 21:46:54.209627] I [MSGID: 101053] [mem-pool.c:616:mem_pool_destroy] 0-management: size=588 max=1 total=1 </div>
<div>[2015-12-14 21:46:54.209640] I [MSGID: 101053] [mem-pool.c:616:mem_pool_destroy] 0-management: size=124 max=1 total=1 </div>
<div> </div>
<div>============================================= </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div>================== FastVol-rebalance.log ============ </div>
<div>... </div>
<div>[2015-12-14 21:46:53.423719] I [MSGID: 109022] [dht-rebalance.c:1290:dht_migrate_file] 0-FastVol-dht: completed migration of /for_ybest_fsdir/user/ji/ay/up/a19640529/linkwrap/129836/07.jpg from subvolume FastVol-client-0 to FastVol-client-1 </div>
<div>[2015-12-14 21:46:53.423976] I [MSGID: 109022] [dht-rebalance.c:1290:dht_migrate_file] 0-FastVol-dht: completed migration of /for_ybest_fsdir/user/ji/ay/up/a19640529/linkwrap/126724/1d0ca0de913c4e50f85f2b29694e4e64.html from subvolume FastVol-client-0 to FastVol-client-1 </div>
<div>[2015-12-14 21:46:53.436268] I [dht-rebalance.c:1010:dht_migrate_file] 0-FastVol-dht: /for_ybest_fsdir/user/ji/ay/up/a19640529/linkwrap/129836/0.jpg: attempting to move from FastVol-client-0 to FastVol-client-1 </div>
<div>[2015-12-14 21:46:53.436597] I [dht-rebalance.c:1010:dht_migrate_file] 0-FastVol-dht: /for_ybest_fsdir/user/ji/ay/up/a19640529/linkwrap/129836/icon_loading_white22c04a.gif: attempting to move from FastVol-client-0 to FastVol-client-1 </div>
<div> </div>
<div><EOF> </div>
<div>============================================== </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div>PuYun </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div>From: PuYun </div>
<div>Date: 2015-12-14 21:51 </div>
<div>To: gluster-users </div>
<div>Subject: Re: [Gluster-users] How to diagnose volume rebalance failure? </div>
<div> </div>
<div> </div>
<div>Hi, </div>
<div> </div>
<div> </div>
<div>Thank you for your reply. I don't know how to send you the huge sized rebalance log file which is about 2GB. </div>
<div> </div>
<div> </div>
<div>However, I might have found out the reason why the task failed. My gluster server has only 2 cpu cores and carries 2 ssd bricks. When the rebalance task began, top 3 processes are 70%~80%, 30%~40 and 30%~40 cpu usage. Others are less than 1%. But after a while, 2 CPU cores are used up totally and I even can't login until the rebalance task failed. </div>
<div> </div>
<div> </div>
<div>It seems 2 bricks require 4 CPU cores at least. Now I upgrade the virtual server with 8 CPU cores and start rebalance task again. Everything goes well for now. </div>
<div> </div>
<div> </div>
<div>I will report again when the current task completed or failed. </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div>PuYun </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div> </div>
<div>From: Nithya Balachandran </div>
<div>Date: 2015-12-14 18:57 </div>
<div>To: PuYun </div>
<div>CC: gluster-users </div>
<div>Subject: Re: [Gluster-users] How to diagnose volume rebalance failure? </div>
<div> </div>
<div>Hi, </div>
<div> </div>
<div>Can you send us the rebalance log? </div>
<div> </div>
<div>Regards, </div>
<div>Nithya </div>
<div> </div>
<div>----- Original Message ----- </div>
<div>> From: "PuYun" <cloudor@126.com> </div>
<div>> To: "gluster-users" <gluster-users@gluster.org> </div>
<div>> Sent: Monday, December 14, 2015 11:33:40 AM </div>
<div>> Subject: Re: [Gluster-users] How to diagnose volume rebalance failure? </div>
<div>> </div>
<div>> Here is the tail of the failed rebalance log, any clue? </div>
<div>> </div>
<div>> [2015-12-13 21:30:31.527493] I [dht-rebalance.c:2340:gf_defrag_process_dir] </div>
<div>> 0-FastVol-dht: Migration operation on dir </div>
<div>> /for_ybest_fsdir/user/Weixin.oClDcjhe/Ny/5F/1MsH5--BcoGRAJPI took 20.95 secs </div>
<div>> [2015-12-13 21:30:31.528704] I [dht-rebalance.c:1010:dht_migrate_file] </div>
<div>> 0-FastVol-dht: </div>
<div>> /for_ybest_fsdir/user/Weixin.oClDcjhe/Kn/hM/oHcPMp4hKq5Tq2ZQ/flag_finished: </div>
<div>> attempting to move from FastVol-client-0 to FastVol-client-1 </div>
<div>> [2015-12-13 21:30:31.543901] I [dht-rebalance.c:1010:dht_migrate_file] </div>
<div>> 0-FastVol-dht: </div>
<div>> /for_ybest_fsdir/user/Weixin.oClDcjhe/PU/ps/qUa-n38i8QBgeMdI/userPoint: </div>
<div>> attempting to move from FastVol-client-0 to FastVol-client-1 </div>
<div>> [2015-12-13 21:31:37.210496] I [MSGID: 109081] </div>
<div>> [dht-common.c:3780:dht_setxattr] 0-FastVol-dht: fixing the layout of </div>
<div>> /for_ybest_fsdir/user/Weixin.oClDcjhe/Ny/7Q </div>
<div>> [2015-12-13 21:31:37.722825] I [MSGID: 109045] </div>
<div>> [dht-selfheal.c:1508:dht_fix_layout_of_directory] 0-FastVol-dht: subvolume 0 </div>
<div>> (FastVol-client-0): 1032124 chunks </div>
<div>> [2015-12-13 21:31:37.722837] I [MSGID: 109045] </div>
<div>> [dht-selfheal.c:1508:dht_fix_layout_of_directory] 0-FastVol-dht: subvolume 1 </div>
<div>> (FastVol-client-1): 1032124 chunks </div>
<div>> [2015-12-13 21:33:03.955539] I [MSGID: 109064] </div>
<div>> [dht-layout.c:808:dht_layout_dir_mismatch] 0-FastVol-dht: subvol: </div>
<div>> FastVol-client-0; inode layout - 0 - 2146817919 - 1; disk layout - </div>
<div>> 2146817920 - 4294967295 - 1 </div>
<div>> [2015-12-13 21:33:04.069859] I [MSGID: 109018] </div>
<div>> [dht-common.c:806:dht_revalidate_cbk] 0-FastVol-dht: Mismatching layouts for </div>
<div>> /for_ybest_fsdir/user/Weixin.oClDcjhe/Ny/7Q, gfid = </div>
<div>> f38c4ed2-a26a-4d83-adfd-6b0331831738 </div>
<div>> [2015-12-13 21:33:04.118800] I [MSGID: 109064] </div>
<div>> [dht-layout.c:808:dht_layout_dir_mismatch] 0-FastVol-dht: subvol: </div>
<div>> FastVol-client-1; inode layout - 2146817920 - 4294967295 - 1; disk layout - </div>
<div>> 0 - 2146817919 - 1 </div>
<div>> [2015-12-13 21:33:19.979507] I [MSGID: 109022] </div>
<div>> [dht-rebalance.c:1290:dht_migrate_file] 0-FastVol-dht: completed migration </div>
<div>> of </div>
<div>> /for_ybest_fsdir/user/Weixin.oClDcjhe/Kn/hM/oHcPMp4hKq5Tq2ZQ/flag_finished </div>
<div>> from subvolume FastVol-client-0 to FastVol-client-1 </div>
<div>> [2015-12-13 21:33:19.979459] I [MSGID: 109022] </div>
<div>> [dht-rebalance.c:1290:dht_migrate_file] 0-FastVol-dht: completed migration </div>
<div>> of /for_ybest_fsdir/user/Weixin.oClDcjhe/PU/ps/qUa-n38i8QBgeMdI/userPoint </div>
<div>> from subvolume FastVol-client-0 to FastVol-client-1 </div>
<div>> [2015-12-13 21:33:25.543941] I [dht-rebalance.c:1010:dht_migrate_file] </div>
<div>> 0-FastVol-dht: </div>
<div>> /for_ybest_fsdir/user/Weixin.oClDcjhe/PU/ps/qUa-n38i8QBgeMdI/portrait_origin.jpg: </div>
<div>> attempting to move from FastVol-client-0 to FastVol-client-1 </div>
<div>> [2015-12-13 21:33:25.962547] I [dht-rebalance.c:1010:dht_migrate_file] </div>
<div>> 0-FastVol-dht: </div>
<div>> /for_ybest_fsdir/user/Weixin.oClDcjhe/PU/ps/qUa-n38i8QBgeMdI/portrait_small.jpg: </div>
<div>> attempting to move from FastVol-client-0 to FastVol-client-1 </div>
<div>> </div>
<div>> </div>
<div>> Cloudor </div>
<div>> </div>
<div>> </div>
<div>> </div>
<div>> From: Sakshi Bansal </div>
<div>> Date: 2015-12-12 13:02 </div>
<div>> To: 蒲云 </div>
<div>> CC: gluster-users </div>
<div>> Subject: Re: [Gluster-users] How to diagnose volume rebalance failure? </div>
<div>> In the rebalance log file you can check the file/directory for which the </div>
<div>> rebalance has failed. It can mention what was the fop for whihc the failure </div>
<div>> happened. </div>
<div>> </div>
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<div>> Gluster-users@gluster.org </div>
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</div></blockquote>
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