On Sat, 20 Jan 2007, Jason Fisher wrote: > I'm down to 75% usage now and write speeds in the root of that > filesystem are still 5MB/sec. I do have a directory that gives me > 180MB/sec writes -- I suppose it has a big set of contiguous blocks > assigned to it.
Interesting thread, really: I still wonder how other filesystems deal with fragmentation over time. Sure, it's good to have >5% of free space, this will be exceeded at peak times and the fs might be running at <1% of free space until the bofh makes room again. but the fragmentation was heavily increased during this "1% free period". It's hard to reproduce too, because most fragmentation really happens over time, methinks. For the record: I have a 30GB jfs on a single scsi disk, created back in 04/2005 which acts as some kind of "scratch partition", so many small files and at other times bigger dvd-images get written to the disk. Often the partition has ~5% of free space, sometimes less. I just dd'ed a DVD image from the partition to /dev/null...18MB/s it said... Christian. -- BOFH excuse #397: T-1's congested due to porn traffic to the news server. ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Jfs-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/jfs-discussion
