<quote name="Stuart Jansen" date="Wed, 12 Mar 2008 at 21:15 -0600"> > Today I had a chance to compare ext3 and XFS overhead. Basically, I > created a new XFS filesystem and copied a bunch of data onto it. Then I > created an ext3 filesystem and copied everything from the XFS filesystem > onto it. Most files were under 15M in size. I didn't compare performance > because all I cared about was space efficiency. Count me as another XFS > fan.
I am an XFS fan as well, and used it as the sole fs on my 250G HD (surfer) for about three years now, my only beef is that it can't resize. I've occasionally wanted to repartition surfer to accomadate some space readable by winsucks, as now it's in an external USB enclosure. If I could resize, this would be doable, but as I can't, I'd need room for the entire contents, which never has gone below 180G or so, and I don't have that kind of space. Recently, I put two new drives in my mythtv box (which also has surfer right now), an 80G and a 120G (which actually turn out to be 74G and 112G). I decided to lvm the two drives into one big 186G (shark), and as much as I wanted to use XFS, I knew I was entirely likely to want to shrink it at some point. Hence I chose ext3. Upon doing so, just after formatting shark to ext3, I noticed there were about 8G completely gone from the getgo. That's what I call painful overhead. So right off the bat that's about 20 hours of mythtv I don't have room for. :( This is compared surfer which has virtually no such discrepency. total - (used + free) from the df command xfs: 244076732 - (150157648 + 93919084) = 0 ext3: 183847020 - (120945192 + 53562948) = 9338880 (about 5% overhead) Maybe xfs merely reports it's overhead as used space where ext just hides it, who knows. I _do_ know that I would have gawked at nearly 12G being used when I first formated surfer, and I remember no such event, so it's at least a smaller overhead. Von Fugal -- Freedom is Popular! http://www.ronpaul2008.com
signature.asc
Description: Digital signature
/* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
