Re: [Moosefs-users] HELP!!! 250T Data lost!

[Ken <ken...@gm...>]

Hi, chengang

I think you should try more, and post detail here. Someone must resolve it.
Maybe you will lost some data in last few minutes, but 250T should be saved.

At first, BACKUP all files:
  /var/lib/mfs/* on master
  /var/lib/mfs/* on mfsmetalogger

about restore error:

> file 'metadata.mfs.back' not found - will try 'metadata_ml.mfs.back'
> instead
> loading objects (files,directories,etc.) ... loading node: read error:
> ENOENT (No such file or directory)
> error
> can't read metadata from file: .//metadata_ml.mfs.back
>
How did you run mfsmetarestore?  add -d options?
If stat(datapath + metadata_ml.mfs.back) fail, these error will occur.
Maybe use strace will show why stat fail exactly.

ps: I am in Beijing now and I can provide more help.

HTH

-Ken



On Wed, Mar 7, 2012 at 10:21 AM, 陈钢 <yik...@gm...> wrote:

> can not start mfsmaster with the file "78962688 Mar  6 17:18 metadata.mfs
> "..
> i tried that. :(
>
> 2012/3/7 Ricardo J. Barberis <ric...@da...>
>
> El Martes 06/03/2012, 陈钢 escribió:
>> > on master
>> [ ... ]
>> > -rw-r-----  1 mfs  mfs   78962688 Mar  6 17:18 metadata.mfs
>> > -rw-r--r--  1 root root         8 Jul  4  2011 metadata.mfs.empty
>> > -rw-r-----  1 mfs  mfs       5984 Mar  6 12:00 sessions.mfs
>> > -rw-r-----  1 mfs  mfs          0 Mar  6 16:46 sessions.mfs.tmp
>> > -rw-r-----  1 mfs  mfs     131072 Mar  6 17:18 stats.mfs
>>
>> You have /var/lib/mfs/metadata.mfs on the master, it might not be corrupt
>> after all?
>>
>> I'd suggest:
>>
>> - backup /var/lib/mfs to another disk/server (for later recovery if
>> needed)
>> - make sure you have free space in your main disk
>> - then simply try to start mfsmaster
>> - check mfs.cgi (web interface) if it looks OK
>>
>>
>> BUT: if you can, wait for confirmation from Michał Borychowski first, in
>> case
>> what I'm telling you is not safe.
>>
>>
>> (BTW: You have Reply-To set to che...@cp..., I don't know if that's
>> intentional on your part)
>>
>> Hope it helps,
>> --
>> Ricardo J. Barberis
>> Senior SysAdmin / ITI
>> Dattatec.com :: Soluciones de Web Hosting
>> Tu Hosting hecho Simple!
>>
>> ------------------------------------------
>>
>
>
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