Re: [Moosefs-users] problem with mfsmetarestore.

[Michał B. <mic...@ge...>]

Normally you do not run the master process on the metalogger machine. You do
it only when the main master server breaks down. In this situation you stop
metalogger, do metarestore and run the master process.

 

You do not need to do anything special to generate metadata_ml.mfs.back on
the metalogger machine. It will be just created. 

 

See http://www.moosefs.org/news-reader/items/metadata-ins-and-outs.html and
read about recovering metadata by mfsmetarestore. Generally you would need
to run "mfsmetarestore -a".

 

 

Regards

Michał 

 

From: Roast [mailto:zha...@gm...] 
Sent: Thursday, July 29, 2010 4:11 AM
To: moosefs-users
Subject: [Moosefs-users] problem with mfsmetarestore.

 

Hi,all.

I want to setup the metalogger server as the backup for the master, so I use
mfsmetarestore to generate the metadata.mfs to start the master at the
metalogger server. But it doesn't works.

Here is some logs:

----------------------------------------------------------------------------
-------------------------------------------
[root@localhost ~]# /usr/local/mfs/sbin/mfsmetarestore -m
/data/mfs/meta/metadata_ml.mfs.back -o /data/mfs/meta/metadata.mfs
/data/mfs/meta/changelog_ml.*.mfs
loading objects (files,directories,etc.) ... ok
loading names ... ok
loading deletion timestamps ... ok
checking filesystem consistency ... ok
loading chunks data ... ok
connecting files and chunks ... ok
applying changes from file: /data/mfs/meta/changelog_ml.0.mfs
meta data version: 961564
version after applying changelog: 961564
applying changes from file: /data/mfs/meta/changelog_ml.10.mfs
meta data version: 961564
version after applying changelog: 961564
applying changes from file: /data/mfs/meta/changelog_ml.11.mfs
meta data version: 961564
version after applying changelog: 961564
applying changes from file: /data/mfs/meta/changelog_ml.12.mfs
meta data version: 961564
version after applying changelog: 961564
applying changes from file: /data/mfs/meta/changelog_ml.13.mfs
meta data version: 961564
version after applying changelog: 961564
applying changes from file: /data/mfs/meta/changelog_ml.14.mfs
meta data version: 961564
version after applying changelog: 961564
applying changes from file: /data/mfs/meta/changelog_ml.15.mfs
meta data version: 961564
version after applying changelog: 961564
applying changes from file: /data/mfs/meta/changelog_ml.16.mfs
meta data version: 961564
version after applying changelog: 961564
applying changes from file: /data/mfs/meta/changelog_ml.17.mfs
meta data version: 961564
version after applying changelog: 961564
applying changes from file: /data/mfs/meta/changelog_ml.18.mfs
meta data version: 961564
version after applying changelog: 961564
applying changes from file: /data/mfs/meta/changelog_ml.19.mfs
meta data version: 961564
version after applying changelog: 961564
applying changes from file: /data/mfs/meta/changelog_ml.1.mfs
meta data version: 961564
963911: version mismatch
[root@localhost ~]# 
----------------------------------------------------------------------------
-------------------------------------------

version mismatch? How to fix this problem?

Thanks.

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