Boxen (was: conceptual overview?)
dag at janrain.com
Tue Jan 16 00:44:28 UTC 2007
Brad Fitzpatrick wrote:
> As for configs:
> DBs: reliable storage subsystem. battery-backed write-back cache
> is nice, speeds commits. big disk cache helps too, and lots of memory on
> the machine for InnoDB is nice. Get two, setup with heartbeat (Linux-HA).
> Storage nodes: Lots of SATA disks, one per mogile device. 3ware
> controller or something is good. Lot of memory helps the buffer cache.
> Don't be tricked into seeing "7GB of memory free!" and thinking, "Oh, I
> should run more stuff on this box!". Because that 7GB of memory is being
> used for file page cache, which makes Mogile effectively faster.
> Trackers: whatever. Needs some CPU, but not much. Run 'em on your first
> few storage nodes (2's probably enough, 3 might be overkill....)
> Any other questions?
Is it a good idea to put storage nodes on the same machines as the
pageservers for the application? Because that would be an easy way to
increase N for both at the same time, but rendering can be a hog, so it
could be better to keep them separate. Any data on this?
Dag Rorek Arneson
OpenID Identifiers: rorek.org, dag.myopenid.com
irc.freenode.net: rorek in #openid
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