Tim thanks for the link, I will give it a go. Kyle appreciate the detailed explanation, yes will try to put in practice through ELB, but I am not sure if I can switch the configs like you do with nginx.
On Wednesday, May 16, 2012 7:32:59 PM UTC+5:30, Kyle Burton wrote: > > > I'm not personally using this but people I trust recommend it highly. > > It has a free option plus fairly reasonable monthly options. > > > > http://www.pingdom.com/ > > We use a similar service: cloudkick > > We have some custom plugins that we've written for it (to monitor > RabbitMQ consumers and queue sizes -- we have had consumers die and > need to be restarted). > > As you are, we are using Nginx. We have it set up to serve static > content and act as a load balancer and to do SSL termination. We have > a cluster of app servers set up behind this Nginx load balancer. > Having multiple app servers helps significantly with issues like a > single box going out. We have 3 configurations for the load balancer: > an A, a B and A+B. Where each has 50% of the app servers configured. > Nginx handles any one of the app servers being down, and we perform > releases, we split the cluster in to A, deploy to the boxes in B, wait > for the JVMs to warm up, the flip A and B and release to the A > partition. When those JVMs have warmed up we put them all back into > rotation (A+B). We use a symlink to point to the 3 configurations and > do a HUP on Nginx to have it reload its configuration without dropping > any connections. > > We're not on AWS yet, if we were I think the same would be > accomplished with ELB instead of Nginx. > > I think this is a pretty common set up -- we are following the books: > Scalable Internet Architectures, and Release IT (I highly recommend > both of those books). > > > Regards, > > Kyle > > -- > Twitter: @kyleburton > Blog: http://asymmetrical-view.com/ > Fun: http://snapclean.me/ > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
