Re: [Moosefs-users] Fwd: Backing up MFS metadata

[Michał B. <mic...@ge...>]

Hi!

 

---------- Forwarded message ----------
From: Stas Oskin < <mailto:sta...@gm...> sta...@gm...>
Date: 2010/7/30
Subject: Re: [Moosefs-users] Backing up MFS metadata
To: Michał Borychowski < <mailto:mic...@ge...> mic...@ge...>



Question. 

  

Yes, you can fully restore metadata from files saved by metalogger.

 

 

How far beyond master the meta server is?

[MB] What do you mean by this question?



Where it's better to backup, on master or on metalogger?

[MB] Master on its own creates binary metadata.mfs.back and text changelogs and you cannot disable it. Metalogger is optionally.

 

If you ask about recovering from the backup if the master server had only power outage and has no hdd problems, you can restore metadata from the master itself. In a more serious damages to master you would need to restore meta from the metalogger.

 

Please read this blog entry:

http://www.moosefs.org/news-reader/items/metadata-ins-and-outs.html

 

 

Regards

Michał 



Thanks.