Am 31.10.2013 20:18, schrieb Claudio Freire:
So, the subject says it all.
I've been testing a huge database on 13.1 RC1, well actually factory, with a btrfs partition (not the system partition, just a dedicated partition), and under heavy write it chokes the system much more than ext4 does.
It also seems to have lower thoughput on what should be mostly parallel sequential access (ie: multiple sequential threads), but I'll have to perform more accurate benchmarks to be sure. It may be an fsync issue.
It's not a critical issue, of course, but I'm in a position to assist with tests, benchmarks and diagnostics... so... what do I need to do to provide useful info here? It is known (e.g. [1], [2]), that btrfs has a performance problem with writes in large files - typical for databases and virtual machines. As long as those problems don't get fixed, I guess there is nothing you can do about it, if you want to use the features of btrfs.
Hendrik [1] https://wiki.archlinux.org/index.php/Btrfs#Copy-On-Write_.28CoW.29 [2] http://www.ilsistemista.net/index.php/linux-a-unix/36-btrfs-mount-options-an... -- To unsubscribe, e-mail: opensuse-factory+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-factory+owner@opensuse.org