[Gluster-devel] What does it mean (unify bug ?) ?

[Антон Халиков]

Hello. It's me again.

>Hi Anton, your volume spec looks fine. Please upgrade to 1.3.9


I've upgraded to 1.3.9. Then I recreated a fresh storage from scratch and
after a few days of using this storage I got the same error again.

Example:

dom0r1:~# head
/backup/hosting/****-databases/****/databases/mysql/db_iis_enfo_en/iis_informer.MYI
head: cannot open
`/backup/hosting/****-databases/****/databases/mysql/db_iis_enfo_en/iis_informer.MYI'
for reading: Input/output error

glusterfs.log contains:
2008-06-09 11:04:49 E [unify.c:873:unify_open] backup-unify:
/hosting/****-databases/***/databases/mysql/db_iis_enfo_en/iis_informer.MYI:
entry_count is 3
2008-06-09 11:04:49 E [unify.c:876:unify_open] backup-unify:
/hosting/****-databases/***/databases/mysql/db_iis_enfo_en/iis_informer.MYI:
found on bbrick2
2008-06-09 11:04:49 E [unify.c:876:unify_open] backup-unify:
/hosting/****-databases/***/databases/mysql/db_iis_enfo_en/iis_informer.MYI:
found on bbrick1
2008-06-09 11:04:49 E [unify.c:876:unify_open] backup-unify:
/hosting/****-databases/***/databases/mysql/db_iis_enfo_en/iis_informer.MYI:
found on afr-ns
2008-06-09 11:04:49 E [fuse-bridge.c:692:fuse_fd_cbk] glusterfs-fuse:
61894193: (12)
/hosting/****-databases/***/databases/mysql/db_iis_enfo_en/iis_informer.MYI
=> -1 (5)

We use rdiff-backup to backup data from our servers. After 2-5 backup cycles
we get the situation.

Storage systems are placed over ext3fs mounted with attributes
rw,noatime,user_xattr.

In the same time I tried to 'head' the file, glusterfsd.log got a lot of
error messages like:
2008-06-09 11:04:49 E [posix.c:1984:posix_setdents] backupbrick-ns: Error
creating file
/var/lib/gluster/ns//hosting/****-databases/***/databases/mysql/db_iis_enfo_en/iis_mylinks_cat.MYI
with mode (0100660)

You can notice the error message complaints about different file. In one
second I got 349 lines complaining about different file names in total. All
these lines were caused by my 'head' call.

glusterfs 1.3.9 built on Jun  2 2008 20:36:02
Repository revision: glusterfs--mainline--2.5--patch-770


Any ideas ?

--
Best regards
Anton Khalikov