2009/9/3 Rob Ayres <[email protected]>: > Hi, > > We are using varnish on a single server with four backend servers. This is > working very well (thanks to the varnish developers!) but we wish to add > some redundancy to the system. The obvious way is just to add another > varnish running on another server in a different datacentre. The downside to > this is that keeping two caches populated will increase the load on the > backend servers. > > We do have the facility to use "backup chaining" which would allow us to use > varnish_1 and then if that goes down we would automatically failover to > varnish_2 but this would have an empty cache so a sudden and huge load would > hit the backend servers. > > Does anyone have any experience or tips on using varnish in this way? > Hi.
We have two varnish load balanced with LVS (active-active). The difference between to use 1 or 2 varnish (for the backends load) is practically zero, because the hit rate is 90%. Hope this helps. BR. _______________________________________________ varnish-misc mailing list [email protected] http://projects.linpro.no/mailman/listinfo/varnish-misc
