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.
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
