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

[Michał B. <mic...@ge...>]

Yes, we can think of metalogger as a "spare" master. When it fails,
metalogger can easily and quickly take over its functions. The process of
switching to metalogger by using CARP is described here:
http://www.moosefs.org/mini-howtos.html#redundant-master (we have not yet
tried Heartbeat and as far as we know nobody from the community have done it
yet neither).

 

And with metalogger it is just easy to back up the metadata on the fly. Of
course, you can additionally back it up to external resources, but you need
to prepare extra scripts.

 

 

Regards

Michal

 

 

 

 

From: Stas Oskin [mailto:sta...@gm...] 
Sent: Wednesday, August 11, 2010 10:47 AM
To: Michał Borychowski
Cc: moosefs-users
Subject: Re: [Moosefs-users] Fwd: Fwd: Backing up MFS metadata

 

Hi.

Thanks a lot - much appreciate your answers :).

  

If you have any other doubts please let us know.

 

 

 

Just one question - what the main benefit of keeping meta-loggers,
considering the meta-data can be backed up to external additional medium?
Is this the option of having high-availability, where the meta-logger could
be quickly brought down, and master brought up using the meta-logger data?

Regards.