Re: [Moosefs-users] Question re: master server failover

[Steve W. <st...@pu...>]

Thanks for your responses, Michal and Thomas.  And I look forward to 
seeing the second generation of your failover solution, Thomas.

Regards,
Steve

On 03/08/2011 10:19 AM, Thomas S Hatch wrote:
> Keep in mind Steve that my solution, as presented in the mailing list 
> is not perfect, and I have found a number of bugs in it.
>
> I am currently working in a second generation system, which is much 
> cleaner and more robust.
>
> Once I have the new system tested to a level in which I am satisfied 
> that it is a truly viable option I will be publishing it on github, 
> unfortunately the hardware I have been using for testing the failover 
> system has been unavailable to me for testing, and my new test 
> hardware is still a month away.
>
> But, since this is obviously such a big deal to so many people, I will 
> try to get the code that I have up on github as quickly as possible. I 
> have written a small daemon in python that fixes many of the problems 
> in migration, and my tests so far have been flawless(which is why I 
> need to run more tests, I can't imagine that it is really working as 
> well as I think it is).
>
> This is probably the only real shortcoming of MooseFS, but I still 
> think that MooseFS is the best option available for distributed 
> filesystems today, and while Ceph is a very promising project, our 
> tests have concluded that it is still a ways out from being production 
> ready. Also, if you have seen any of my previous posts on the matter, 
> I am not a big fan of GlusterFS, we experienced rampant... RAMPANT 
> data corruption, and the reliability was far below sub standard.
>
> I hope I can be helpful, and if you (or anyone else) are interested in 
> assisting with failover testing I must admit that I would be more 
> motivated to get what I have out, I will post as soon as I can get it 
> all up to github.
>
> -Thomas S Hatch
> -Systems Engineer, Beyond Oblivion
>
> On Tue, Mar 8, 2011 at 2:59 AM, Michal Borychowski 
> <mic...@ge... <mailto:mic...@ge...>> 
> wrote:
>
>     Hi
>
>     As you know a redundant master functionality is right now not a
>     built-in
>     functionality. This subject is for us very crucial because we know how
>     important this is and we receive lots of requests about it from many
>     sources. Unfortunately I cannot give a date when it would be
>     ready. 6 months
>     is not rather possible.
>
>     We've been using MooseFS for more than 5 years and it appears that
>     in real
>     it is not that big problem. For the moment we recommend using
>     solutions with
>     eg. ucarp.
>
>     Please read this tutorial from Thomas:
>     http://sourceforge.net/mailarchive/message.php?msg_id=26804911
>
>
>     Kind regards
>     Michal
>
>
>
>     -----Original Message-----
>     From: Steve Wilson [mailto:st...@pu...
>     <mailto:st...@pu...>]
>     Sent: Monday, March 07, 2011 4:43 PM
>     To: moo...@li...
>     <mailto:moo...@li...>
>     Subject: [Moosefs-users] Question re: master server failover
>
>     Hi,
>
>     I understand that there's some consideration being given to
>     implementing
>     a redundant master server for failover purposes.  I've not seen this
>     show up yet on the MooseFS roadmap, though.  Are there any plans for
>     building failover into MooseFS and, if so, is there a rough idea
>     of the
>     timeline involved (i.e., are we talking about six months or two years
>     or...)?
>
>     Thanks!
>
>     Steve
>
>     --
>     Steven M. Wilson, Systems and Network Manager
>     Markey Center for Structural Biology
>     Purdue University
>     (765) 496-1946
>
>
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>     What You Don't Know About Data Connectivity CAN Hurt You
>     This paper provides an overview of data connectivity, details
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-- 
Steven M. Wilson, Systems and Network Manager
Markey Center for Structural Biology
Purdue University
(765) 496-1946