I've had the same problem in the past and for me using resv_level=0 in the mount option reduced the problems. I didn't knew about this mount option but in this page http://www.mjmwired.net/kernel/Documentation/filesystems/ocfs2.txt you can find the explanation os this and other options.
Ive reformatted the partition and on all servers I use that option. This way I've been able to use already 97% of the partitions. We could go to 100% but I want to have some free space for whatever need that could arrise. Hope this helps. Adelino On Thu, May 10, 2012 at 10:05 PM, Jay V <jvas...@gmail.com> wrote: > On Thu, May 10, 2012 at 1:59 PM, Jay V <jvas...@gmail.com> wrote: >> Ever since the file system reached 82% full, the file system has gone to a >> crawl and stalls of only writing up to 10 mb/s, even going as slow as a few >> kbytes/sec. The file system may be fragmented. Is there a defrag tool? >> >> I have tried many options, but nothing seems to work. "data=writeback" does >> seem to work. We have checked the logs, debugs, traces trying to figure out >> the probelm, but with no success. >> > > I meant to say data=writeback does not seem to work. > >> Features: >> Compat: backup-super strict-journal-super >> Incompat: sparse inline-data >> RO Compat: unwritten >> debugfs.ocfs2 -R "stats" /dev/drbd2 >> Revision: 0.90 >> Mount Count: 0 Max Mount Count: 20 >> State: 0 Errors: 0 >> Check Interval: 0 Last Check: Sat Mar 17 05:51:42 2012 >> Creator OS: 0 >> Feature Compat: 3 backup-super strict-journal-super >> Feature Incompat: 80 sparse inline-data >> Tunefs Incomplete: 0 >> Feature RO compat: 1 unwritten >> Root Blknum: 5 System Dir Blknum: 6 >> First Cluster Group Blknum: 3 >> Block Size Bits: 12 Cluster Size Bits: 12 >> Max Node Slots: 2 >> Extended Attributes Inline Size: 0 >> Label: imepool2 >> UUID: 5AAD4275BEBA4F96B8FEE7274FC4D043 >> Hash: 0 (0x0) >> DX Seeds: 0 0 0 (0x00000000 0x00000000 0x00000000) >> Cluster stack: classic o2cb >> Cluster flags: 0 >> Inode: 2 Mode: 00 Generation: 2084865048 (0x7c448418) >> FS Generation: 2084865048 (0x7c448418) >> CRC32: 00000000 ECC: 0000 >> Type: Unknown Attr: 0x0 Flags: Valid System Superblock >> Dynamic Features: (0x0) >> User: 0 (root) Group: 0 (root) Size: 0 >> Links: 0 Clusters: 3496426618 >> ctime: 0x4aa1e6e7 0x0 -- Fri Sep 4 21:19:51.0 2009 >> atime: 0x0 0x0 -- Wed Dec 31 16:00:00.0 1969 >> mtime: 0x4aa1e6e7 0x0 -- Fri Sep 4 21:19:51.0 2009 >> dtime: 0x0 -- Wed Dec 31 16:00:00 1969 >> Refcount Block: 0 >> Last Extblk: 0 Orphan Slot: 0 >> Sub Alloc Slot: Global Sub Alloc Bit: 65535 >> >> Version OCFS2 1.8.0: >> filename: >> /lib/modules/2.6.39-100.5.1.el6uek.x86_64/kernel/fs/ocfs2/ocfs2.ko >> license: GPL >> author: Oracle >> version: 1.8.0 >> description: OCFS2 1.8.0 >> srcversion: A427F5E2A962D0808C8478F >> depends: jbd2,ocfs2_stackglue,ocfs2_nodemanager >> vermagic: 2.6.39-100.5.1.el6uek.x86_64 SMP mod_unload modversions >> mounted options: rw,_netdev,noatime,nodiratime,heartbeat=local >> >> When deleting files it seems to help temporarily. I like to be able to go >> over 82% without this degradation. >> >> I want to minimize downtime as this filesystem is 15TB. Is there a feature I >> can enable such as "discontig-bg" that will help?? >> >> Thanks so much for your help! >> -Jay > > _______________________________________________ > Ocfs2-users mailing list > Ocfs2-users@oss.oracle.com > http://oss.oracle.com/mailman/listinfo/ocfs2-users -- Cumprimentos / Best Regards Adelino Monteiro _______________________________________________ Ocfs2-users mailing list Ocfs2-users@oss.oracle.com http://oss.oracle.com/mailman/listinfo/ocfs2-users
