On Fri, 2014-05-16 at 16:48 +0100, Tomasz Chmielewski wrote: > While doing rsyncs of large archives from one RAID-1 btrfs filesystem > to another RAID-1 btrfs filesystem: > > btrfs filesystem 1: sda + sdb (RAID-1), being copied to: > btrfs filesystem 2: sdc + sdd (RAID-1) > Server has 32 GB RAM > > > I can observe the following: > > > From time to time, rsync "freezes", while there is high IO on only *one* > of write drives.
No comment on the performance issue, other than to say that I've seen similar on RAID-10 before, I think. > Also, what happens when the system crashes, and one drive has several > hundred megabytes data more than the other one? This shouldn't be an issue as long as you occasionally run a scrub or balance. The scrub should find it and fix the missing data, and a balance would just rewrite it as proper RAID-1 as a matter of course. -- Calvin Walton <[email protected]> -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
