On Tuesday, December 21, 2010 01:11:44 am Bruce Locke wrote: > A checklist of things to do (including some already mentioned):
... > * If you have a small filesystem (say less than 100GB) and are > regularly creating, destroying and copying around large 1GB+ files and > using tools like BitTorrent your filesystem will suffer from > fragmentation Note on this: there are usually settings for BitTorrent as to how large files are allocated; you can avoid a lot of the fragmentation issues by using the "fully reserve disk space" setting. ... > * Advanced thought: Did you switch from ext3 to ext4 as part of the > upgrade? If so are you using any fsync() heavy apps? The interesting thing about this is lots of other filesystems other than ext3 (XFS, JFS, etc) had different default behavior for fsync() and a lot of applications generally relied on the ext3 fsync() behavior -- up until the switchover to ext4 made it clear that it /had/ to be fixed. The performance issues I was seeing after the initial ext3 -> ext4 switchover have gotten better to the point that I no longer notice issues. I have my doubts as to whether this could be a major culprit in this case -- and I don't think it would explain the increasing degradation over time. -- Chris -- Chris Knadle [email protected] _______________________________________________ Mid-Hudson Valley Linux Users Group http://mhvlug.org http://mhvlug.org/cgi-bin/mailman/listinfo/mhvlug Upcoming Meetings (6pm - 8pm) MHVLS Auditorium Jan 5 - Building a Community Site with Drupal Feb 2 - Zimbra Mar 2 - MHVLUG 8th Anniversary - Show and Tell
