Hi, I am using cowbuilder for building my packages, because the initialization takes like 10s, compared to several minutes with pbuilder on my system. A few days ago, I realized that on one of my systems, it takes 0.5s only to copy the COW directory. I became curious and wanted to know why, so I did a benchmarking [1] and to my utter surprise, it turned out the problem is in the XFS filesystem, that is 20x slower, than the ext3 filesystem. I know that XFS is bad at handling small files, but 20x times?
Basically, what cowbuilder is doing is just those 2 commands: cp -al /var/cache/pbuilder/base.cow /tmp/new rm -rf /tmp/new and those are the ones I tested. So it's a benchmarking of creating a tree of hardlinks and then deleting it. For details see that page [1]. If you use cowbuilder, which filesystem are you using? And how long does it take to copy the COW dir for you? Ondrej P.S. I don't know if this belongs to mentors or devel, so I am posting to both. [1] http://wiki.debian.org/cowbuilder_benchmark -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
