On Mon, 20 Apr 2009, Eric Sandeen wrote:
Jeremy Sanders wrote:
On Mon, 20 Apr 2009, Eric Sandeen wrote:
...
One other question - do you make use of xattrs on this filesystem?
No.
I've commandeered about 10T of disk space to see if I can hit this.
Would you mind providing dumpe2fs -h output for your 8.2T filesystem so
I can exactly replicate the geometry?
I formatted with
mkfs.ext4 -m0 -b 4096 -E stride=8,stripe-width=72 /dev/md0
[root@xback2 ~]# dumpe2fs -h /dev/md0
Filesystem volume name: <none>
Last mounted on: <not available>
Filesystem UUID: 34fefacb-0494-4df7-b189-e11b2064dd90
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize
Filesystem flags: signed_directory_hash
Default mount options: (none)
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 549314560
Block count: 2197239840
Reserved block count: 0
Free blocks: 2162717221
Free inodes: 549314549
First block: 0
Block size: 4096
Fragment size: 4096
Reserved GDT blocks: 500
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 8192
Inode blocks per group: 512
RAID stride: 8
RAID stripe width: 72
Flex block group size: 16
Filesystem created: Mon Apr 20 17:29:14 2009
Last mount time: n/a
Last write time: Mon Apr 20 17:38:28 2009
Mount count: 0
Maximum mount count: 38
Last checked: Mon Apr 20 17:29:14 2009
Check interval: 15552000 (6 months)
Next check after: Sat Oct 17 17:29:14 2009
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
First inode: 11
Inode size: 256
Required extra isize: 28
Desired extra isize: 28
Journal inode: 8
Default directory hash: half_md4
Directory Hash Seed: 06d43af3-a75c-405a-8f25-e51517dae7f6
Journal backup: inode blocks
Journal size: 128M
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