On Sun, Jun 02, 2013 at 07:40:52AM -0700, George Mitchell wrote: > I am seeing massive journal corruptions that seem to be unique to > btrfs and I am suspecting that cow might be causing them. My > bandaid fix for this will be to mark the /var filesystem "nodatacow" > at boot. But I am wondering if their is any way to flag a > particular directory as "nodatacow" outside of the mount process. I > would like to be able to mark /var/log/journal as "nodatacow" for > example, without having to declare it a subvolume and mount it > separately. Hi George, We actually have per-file/directory nodatacow :) But please note if you set nodatacow on the particular directory, only new-created or zero-size files in the directory can follow the nocow rule. 'chattr' in the latest e2fsprogs can fit your requirements, # chattr +C /var/log/journal Also, what kind of massive journal corruptions? Does it look like a btrfs specific bug? thanks, liubo -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
