[Linux-cluster] GFS and CLVM-snapshot
wkenji at labs.fujitsu.com
Thu May 12 02:28:37 UTC 2005
David Teigland wrote:
> If the NetApp has block-level snapshots, that would be an excellent
> solution (better than any kind of host-based snapshots).
From what I've heard, apparently NetApp has LUN-level snapshots.
That sounds promising!
> [root at va03 ~]# gfs_tool freeze /gfs
> gfs_tool: unknown mountpoint /gfs
> [root at va03 ~]# gfs_tool list
> 3501862912 gnbd0 foo:a.0
> [root at va03 ~]# gfs_tool freeze 3501862912
> [root at va03 ~]# gfs_tool unfreeze 3501862912
I see how it is. It worked stably!
By the way, sometimes I get warnings from gfs_fsck for snapshot-LV,
even though I froze GFS before doing lvcreate -s.
For example, the followings are. Is this usual thing?
# gfs_fsck -y /dev/vg0/lv0ss0
Found unlinked inode at 1929233
Adjusting freemeta block count (59 -> 60).
Adjusting used dinode block count (10 -> 9).
l+f directory at 29
Added inode #1929233 to l+f dir
Found unlinked inode at 1800635
Added inode #1800635 to l+f dir
Link count inconsistent for inode 25 - 5 6
Link count updated for inode 25
ondisk and fsck bitmaps differ at block 29
used inode count inconsistent: is 9 should be 10
free meta count inconsistent: is 60 should be 59
> The cluster components are changing radically in CVS head and don't all
> work together yet. So, you need to checkout code from the RHEL4 or FC4
> cvs branches.
I see, I will try with FC4-test3 from now.
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