On Apr 17, 2007, at 3:55 AM, Clinton Gormley wrote:
Must disagree with you about pound http://www.apsis.ch/pound/
index_html
being a PITA to configure and maintain.
Pound is really easy to configure, fast as all hell, and just never
goes
down. I've been using it for about 3 years now and I've never ever
had
a problem with it.
if its working for you, great ;)
I had some issues when I first tried it, then leaned to nginx which
can handle proxy+loadbalancing and serving static content as well.
Just a point of clarification, with reference to this email:
http://marc.info/?l=apache-modperl&m=117595808501296&w=2
(File Uploads using MP2 best practises):
is it reasonable to serve your static files from a mod_perl server, as
long as you have a proxy/pound/squid in front?
My understanding is that the cost of using your mod_perl server to
serve
static files is the amount of time that a slow request would tie them
up. However, if your requests are all fast, because your proxy
handles
the slow part, then this ceases to be an issue. Am I correct in this
assumption?
I have a bunch of mod_perl servers behind a single pound proxy (plus
failover), and they share the uploaded images via NFS currently,
although I'm considering moving to iSCSI with OCFS2 when I am
convinced
of its stability.
Any views on this?
That assumption sounds right -- so long as you have a caching proxy
like squid. Not all proxies cache ( i'm pretty sure that pound
doesn't ). Any content you can offload from mp should give your app
a big boost -- the thing that 'kills' modperl performance is tying up
the same apache child used for content generation with 45 .gifs/jpg/
pngs and a handful of css/js files.
If you're doing uploaded images over NFS though, chances are you have
a lot of images -- which can make caching a bit of a nightmare as you
try to balance the cache params. so i'd strongly suggest using a
lightweight server (even vanilla apache would be an improvement).
alternately, you could consider using amazon's s3 for mass storage
with a CDN for distribution. ( i'm constantly told that s3 has
uptime/access issues -- your data is safe, but it might not be
accessible for an hour ). using a combo of the two gives you
reliable storage and distro both for cheap.
// Jonathan Vanasco
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