Ron Johnson put forth on 4/25/2011 4:54 PM: > On 04/25/2011 02:33 PM, Stan Hoeppner wrote: >> Ron Johnson put forth on 4/25/2011 1:25 AM: >>> On 04/19/2011 05:42 PM, Stan Hoeppner wrote: >>> [snip] >>>> >>>> XFS beats EXT4 hands down in nearly every category, >>> >>> Including not being able to xfs_check very large filesystems on 32 bit >>> machines. (Which if why I'm going back to ext4.) >> >> This is an odd statement given that XFS (on 32 bit archs) and EXT4 both >> currently top out at 16 TiB. Thus moving to EXT4 gains you nothing on a >> 32 bit machine, and you lose many advantages. >> >> Please define "very large filesystems" and post the specific error >> message you received when running xfs_check on this "very large >> filesystem" on your 32 bit machine. >> > > The fs was approx 3.5TB. > > # xfs_check /dev/mapper/backup_vg-backup_lv > xfs_check: Out Of Memory
This is not a 32 bit system limitation per se, as you initially claimed, but a memory size limitation, as the error clearly states. This is a well known issue with xfs_check BTW, plenty of info available via your favorite search engine, including workarounds. Using 'xfs_repair -n' will give you essentially the same results as xfs_check but with much less memory usage. Assuming you have 4GB physical RAM in the box in question 'xfs_repair -n' should work for a 3.5TB XFS. Newer versions of xfs_check require less RAM than older versions, but xfs_check still needs significant memory resources for checking large filesystems with lots of inodes and lots of fragmented free space. To address the 32 bit system limitation claim, running a PAE kernel with xfsprogs apps compiled with PAE support will get around this out of memory error, assuming you have enough physical RAM. PAE supports up to 64GB. I do not recommend this. I'm simply stating it is possible. Since most x86 chips shipped in the past 6 years support x86-64, you're better off using a full 64 bit distro and a machine with 8GB or more RAM. -- Stan -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/4db60919.6080...@hardwarefreak.com
