<div>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? </div>
<div> </div><div>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.</div><div>
</div><div>Features:</div><div>Compat: backup-super strict-journal-super<br>Incompat: sparse inline-data<br>RO Compat: unwritten<br></div><div>debugfs.ocfs2 -R "stats" /dev/drbd2<br> Revision: 0.90<br> Mount Count: 0 Max Mount Count: 20<br>
State: 0 Errors: 0<br> Check Interval: 0 Last Check: Sat Mar 17 05:51:42 2012<br> Creator OS: 0<br> Feature Compat: 3 backup-super strict-journal-super<br> Feature Incompat: 80 sparse inline-data<br>
Tunefs Incomplete: 0<br> Feature RO compat: 1 unwritten<br> Root Blknum: 5 System Dir Blknum: 6<br> First Cluster Group Blknum: 3<br> Block Size Bits: 12 Cluster Size Bits: 12<br> Max Node Slots: 2<br>
Extended Attributes Inline Size: 0<br> Label: imepool2<br> UUID: 5AAD4275BEBA4F96B8FEE7274FC4D043<br> Hash: 0 (0x0)<br> DX Seeds: 0 0 0 (0x00000000 0x00000000 0x00000000)<br> Cluster stack: classic o2cb<br>
Cluster flags: 0<br> Inode: 2 Mode: 00 Generation: 2084865048 (0x7c448418)<br> FS Generation: 2084865048 (0x7c448418)<br> CRC32: 00000000 ECC: 0000<br> Type: Unknown Attr: 0x0 Flags: Valid System Superblock<br>
Dynamic Features: (0x0)<br> User: 0 (root) Group: 0 (root) Size: 0<br> Links: 0 Clusters: 3496426618<br> ctime: 0x4aa1e6e7 0x0 -- Fri Sep 4 21:19:51.0 2009<br> atime: 0x0 0x0 -- Wed Dec 31 16:00:00.0 1969<br>
mtime: 0x4aa1e6e7 0x0 -- Fri Sep 4 21:19:51.0 2009<br> dtime: 0x0 -- Wed Dec 31 16:00:00 1969<br> Refcount Block: 0<br> Last Extblk: 0 Orphan Slot: 0<br> Sub Alloc Slot: Global Sub Alloc Bit: 65535</div>
<div> </div><div>Version OCFS2 1.8.0:</div><div>filename: /lib/modules/2.6.39-100.5.1.el6uek.x86_64/kernel/fs/ocfs2/ocfs2.ko<br>license: GPL<br>author: Oracle<br>version: 1.8.0<br>description: OCFS2 1.8.0<br>
srcversion: A427F5E2A962D0808C8478F<br>depends: jbd2,ocfs2_stackglue,ocfs2_nodemanager<br>vermagic: 2.6.39-100.5.1.el6uek.x86_64 SMP mod_unload modversions <br></div><div>mounted options: rw,_netdev,noatime,nodiratime,heartbeat=local</div>
<div> </div><div>When deleting files it seems to help temporarily. I like to be able to go over 82% without this degradation.</div><div> </div><div>I want to minimize downtime as this filesystem is 15TB. Is there a feature I can enable such as "discontig-bg" that will help??</div>
<div> </div><div>Thanks so much for your help!</div><div>-Jay</div>