Mogile Deployment Layout: More Hosts or More Disks.

marc at marc at
Tue Sep 18 06:59:43 UTC 2007

I can only comment on what I'd do - I don't run mogile (yet) and am just 
observing.   We have a similar, home grown system.  I would go for boxes 
with more disks if I were you.     How much actual storage would you be 


Javier Frias wrote:
> Hello all,
> At my company we've recently evaluated mogilefs and it seems to meet
> our needs. (great piece of software btw ) We are now planning to build
> out our prod configuration and are having issues deciding on a
> hardware layout, so I'm looking for input from people that may have
> used mogilefs in a similar way.
> Basically, we will be using mogilefs for long term text and image
> archiving, as well as low level image serving ( it will only be
> feeding our CDN, so while there will be some performance issues, it
> doesnt look to be now our primary concern since the system will only
> be feeding the CDN and not taking the brunt of the traffic itself ),
> but from time to time, we will run batch jobs that will fetch ten's of
> thousands of items for reprocessing.
> Main question is, do we do more hosts per disks, or more disks per hosts.
> Due to hardware standards ( self imposed, too many hosts to have to
> worry about yet another hardware manufacturer ) I have the choice of
> either a host that can handle two 750GB disks ( dell 860s or 1435's )
> or a host that can handle 6 x 750GB disks ( dell 2950's ) for the
> storage nodes. The difference in pricing is about 20%  in favor of a 6
> disk server solution, versus a 2 disks server solution. So is the
> extra complexity worth it in terms of performance and redundancy? or
> will i be shooting myself in the foot by having 3 X the number of
> storage nodes? I'm planning a 3 copy policy for most of my files, and
> will need approximate 5TB to start, so we are taking of at least 4 x 6
> disks systems, or 10-12 2 disk systems.
> Any input greatly appreciated.
> As a side note, any real reason not to run the trackers on the storage
> nodes? also, anyone have any pros cons on running mysql master/save
> with InnoDB on DRBD versus running lets say mysql cluster?
> thx

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