David Kempe wrote: > XFS is good, we use it on dapper all the time. My largest XFS filesystem > is 5.5TB formatted. > I have to say 64-bit is the only way to go for this - the xfs repair > tools can't handle larger filesystems in 32bit mode. > btw, one thing I found was that xfs_repair can chew massive amounts of > ram to run a repair on a filesystem. I had a 2TB fs take nearly 8gb of > ram (and swap) to repair it. It did a good job of repairing, and took > ages. So XFS is not free of the fsck problem, just xfs_check is faster > and perhaps less thorough (dunno).
I'll be doing all of these on 64-bit systems, good to know. I just got a new project today that will start out around 5TB and likely grow to 7 or 8 soon. Not all these systems have enough ram + swap to get to 8GB of virtual memory, I wonder how it works without that much, I hope it doesn't just fail? Also, you can run xfs_check online, right? That's my impression, so at least the server isn't down during the check, although it will likely be crawling. > > Importantly, you can have data-loss on XFS if you lose power suddenly, > perhaps more so than ext3. When files get corrupted on XFS, I have > noticed they go to zero size, whereas in messy situations with ext3 I > have noticed you are more likely to loose metadata than data. I still > would stick with XFS anyday though, even just because the sheer increase > in format time. Yes I've heard this as well from some RedHat/CentOS friends. My intent would be to make sure all the systems with XFS have a good UPS, and are setup to shutdown on power loss. Of course, we'll have a good backup plan as well. That should mitigate things to the point it doesn't really matter... > > I have had good results on many different types of block devices as well. > > thanks > > dave Thanks much Dave, I'm feeling more confident already. -- Nick Webb System Administrator Freelock Computing - www.freelock.com 206.577.0540 x22 -- ubuntu-server mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-server More info: https://wiki.ubuntu.com/ServerTeam
