[Ocfs2-users] ocfs2 filesystem seems out of sync

[Tom Schouteden]

I did some further testing.  When I try to `ls` the directory from both 
nodes, both report the same files and I believe also the same inodes 
(?). eg:

debugfs: ls
	17              16   1    2  .
	17              16   2    2  ..
	131593          24   10   2  lost+found
	131594          36   4    1  test
	516105          20   5    2  mysql
	516814          3984 9    2  documents

This is identical on both nodes.  However, when I look at the mounted 
filesystem on the node itself, only one node shows the 'test' file.

When I run `debugfs.ocfs2 -R "stats" /dev/Docs/docs` on both systems, 
the 2nd node replies:

"open: I/O error on channel while opening context for device /dev/Docs/docs
No device open"

When I run it again, I get the same reply on both nodes:

# debugfs.ocfs2 -R "stats" /dev/Docs/docs
	Revision: 0.90
	Mount Count: 0   Max Mount Count: 20
	State: 0   Errors: 0
	Check Interval: 0   Last Check: Mon Aug 11 14:37:05 2008
	Creator OS: 0
	Feature Compat: 1 BackupSuper
	Feature Incompat: 0 None
	Tunefs Incomplete: 0 None
	Feature RO compat: 0 None
	Root Blknum: 17   System Dir Blknum: 18
	First Cluster Group Blknum: 8
	Block Size Bits: 12   Cluster Size Bits: 15
	Max Node Slots: 2
	Label: KTDMS
	UUID: F0667F99E9E142818F247E21CFAEC441
	Inode: 2   Mode: 00   Generation: 257944831 (0xf5fecff)
	FS Generation: 257944831 (0xf5fecff)
	Type: Unknown   Attr: 0x0   Flags: Valid System Superblock
	User: 0 (root)   Group: 0 (root)   Size: 0
	Links: 0   Clusters: 6651904
	ctime: 0x48a03271 -- Mon Aug 11 14:37:05 2008
	atime: 0x0 -- Thu Jan  1 01:00:00 1970
	mtime: 0x48a03271 -- Mon Aug 11 14:37:05 2008
	dtime: 0x0 -- Thu Jan  1 01:00:00 1970
	ctime_nsec: 0x00000000 -- 0
	atime_nsec: 0x00000000 -- 0
	mtime_nsec: 0x00000000 -- 0
	Last Extblk: 0
	Sub Alloc Slot: Global   Sub Alloc Bit: 65535

I have no idea as to while it failed the first time I ran it though.

Looking forward to your input.

Many thanks


tom


Sunil Mushran wrote:
> Which kernel/distro/ocfs2 version?
> 
> When you say writes, are you referring to files/dirs mismatch or
> filedata mismatch. Can you expand on what you are noticing.
> 
> BTW, you can use debugfs.ocfs2 to help in your debugging.
> It allows one to read the contents of the fs directly from the
> volume. It has commands like ls and cat. Check out its manpage.
> 
> For example, say a file is not showing up on the other node.
> Do a sync on the node you created the file and then use debugfs.ocfs2
> to read the fs. Do the same on both nodes.
> 
> Tom Schouteden wrote:
>> Hi there
>>
>> I recently installed an OCFS2 filesystem on our FC-SAN.  Everything 
>> seemed to work fine and I could read & write the filesystem from both 
>> servers that are mounting it.  After a while though, writes coming from 
>> one node do not appear on the other node and vice versa.
>>
>> I am not sure what's causing this, and not very experienced at debugging 
>>   filesystems.  If anybody has any pointers as to how to debug/solve 
>> this,   that would be greatly appreciated.
>>
>> Not sure if the following information is useful at all, but let me know 
>> if you need anything else:
>>
>> [root at docs1 mon]# /etc/init.d/o2cb status
>> Module "configfs": Loaded
>> Filesystem "configfs": Mounted
>> Module "ocfs2_nodemanager": Loaded
>> Module "ocfs2_dlm": Loaded
>> Module "ocfs2_dlmfs": Loaded
>> Filesystem "ocfs2_dlmfs": Mounted
>> Checking O2CB cluster ocfs2: Online
>>    Heartbeat dead threshold: 31
>>    Network idle timeout: 30000
>>    Network keepalive delay: 2000
>>    Network reconnect delay: 2000
>> Checking O2CB heartbeat: Active
>>
>> [root at docs1 mon]# /etc/init.d/ocfs2 status
>> Configured OCFS2 mountpoints:  /mnt/docsdata
>> Active OCFS2 mountpoints:  /mnt/docsdata
>>
>> Best regards
>>
>>
>> tom
>>
>> _______________________________________________
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>>   
> 
> 
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