Thanks for your reply On Wed, Feb 11, 2009 at 9:22 PM, J Potter <jpotter-centos at codepuppy.com>wrote: > > Look at pound: http://www.apsis.ch/pound/ > > If you are concerned about traffic volume, you might consider running > squid as a transparent proxy in front of pound. I.e.: > > request -> squid -> pound -> apache > > Where squid will return the response for everything marked as > cacheable and still fresh; and pound will take care of load balancing > to apache. (Pound can inspect/insert cookies to send visitors to the > same back-end node on subsequent requests.) On some of our setups, > squid responds to 98% of the requests coming in, and is able to > respond to an extremely insane high volume of requests. Other list > users might be able to provide good stats as to what sort of volume > they can support. (I'd be curious to hear what others have seen...) > > For HA: > - 2 instances of squid, active/standby or active/active (i.e. two IP > address in DNS for the public hostname, and have each squid instance > pick up the others during failure). > - 2 instances of pound, active/standby > - N instances of apache > > Re: replication of content on your apache nodes, another poster > suggested drbd. From my understanding, I do not think this is > possible, since only one node can mount the drbd volume at a time. If > you have shared data that needs to be seen across apache nodes, either > stick it in SQL or mount an NFS volume across the nodes. (But then you > have NFS in the picture, which might not be so good.) > > If your apache code is constant, then have a master apache node and > write a shell script that runs rsync to push code changes out to the > other instances. > > It's hard to get very specific about what's best for your setup > without know the specifics of things like the data sync needs on the > apache nodes, so take all of this with a grain of salt -- or as a > default starting place. > > best, > Jeff > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20090213/dd9e343a/attachment-0005.html>