Re: [Moosefs-users] problem with mfsmetarestore.

[Roast <zha...@gm...>]

Thanks Michał .

I want to restore the meta data from metalogger machine, so there is no
mfsdata.mfs.back  at the metalogger machine.

And at the metalogger server, metadata_ml.mfs.back will sync from master 24
hours as default, so I think we can restore the meta data with
metadata_ml.mfs.back and changelog_ml.0.mfs ~ changelog_ml.24.mfs. But we
met *version mismatch *and* **Data mismatch*.

Here is some new logs.

-----------------------------------------------------------------------------------------------------------------------
version after applying changelog: 2072593
applying changes from file: /usr/local/mfs/var/mfs/changelog_ml.1.mfs
meta data version: 2072593
version after applying changelog: 2077544
applying changes from file: /usr/local/mfs/var/mfs/changelog_ml.0.mfs
meta data version: 2077544
2081473: error: 32 (Data mismatch)
-----------------------------------------------------------------------------------------------------------------------

And can you tell me how to fix this problem?  Or how to restore the metadata
without master?

Thanks again.


2010/8/10 Michał Borychowski <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.htmland 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.
>
> --
> The time you enjoy wasting is not wasted time!
>



-- 
The time you enjoy wasting is not wasted time!