Re: [Moosefs-users] Metalogger failover

[Thomas S H. <tha...@gm...>]

Ok, I found the metadata blog post and that answered my questions:

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

Great article, cleared up a lot!

But I have another question, I am running mfsmetarestore on one of my
loggers, and I keep getting errors, it is either:
174660: error: 3 (No such file or directory)

or

873: error: 32 (Data mismatch)

and I remember one being an error 7

Can anyone point me in the right direction to figure out how to solve these
errors?

My guess is that since I have been failing over masters using ucarp that I
got some inconsistent data, but I am not sure.

Thanks!


On Tue, Nov 2, 2010 at 5:50 PM, Thomas S Hatch <tha...@gm...> wrote:

> I am running an automatic metalogger failover using ucarp and running into
> problems. After I failover to a new mfsmaster the new mfsmaster shows that
> many files are missing, I have a goal set to 2 , many files are down to goal
> 1, as one might expect, but the files that are missing never seem to come
> back, even with all chunkservers connected.
>
> So my question is, what EXACTLY doses the metalogger pull from the master,
> and what files need to be copied over to turn a metalogger into an
> mfsmaster?
>
> Right now I am running mfsmetarestore -a and then copying
> the /var/lib/mfs/metadata_ml.mfs.back to /var/lib/mfs/metadata.mfs and
> then /var/lib/mfs/sessions_ml.mfs to /var/lib/mfs/sessions.mfs
>
> The more I look at it the more I think I am missing something or doing it
> in the wrong order.
>
> And what exactly is in the changelog files?
>
> -Tom Hatch
>