ktm@xxxxxxxx schrieb (18.09.2014 21:43 Uhr): > On Thu, Sep 18, 2014 at 12:07:57PM -0700, Vincent Fox wrote: >> On 9/18/2014 11:58 AM, Fabio S. Schmidt wrote: >>> Does anyone have any better ideas to improve the high availability? I >>> was wondering about using HAPROXY vs NGINX but I do not know their >>> behaviours in cases like I mentioned above. >>> >> We have for about 8 years used Perdition for POP/IMAP proxy. >> >> 3 simple Linux boxes in a load balanced pool. >> >> Friends don't let friends do Round Robin DNS. You can't count >> on removing DNS entries, since propagation can be very slow and >> some clients don't even respect TTL. >> > > We also used Perdition here for our POP3/IMAP proxy. Unfortunately, its > process per connection resulted in an enormous resource footprint when > everyone was connected to the server. In addition, the startup stampede > of processes completely swamped the frontends crippling the performance > until a steady state was reached. As a result, we moved to using NGINX > as our POP3/IMAP proxy. Now a single-box can carry the connection load > that 4 or more boxes struggled with along with better responsiveness > and performance to boot. > > These are all located behind our Citrix Netscaler boxes. You should > be able to replicate their function with either haproxy or nginx. What does the Netscaler do in this scenario? Marc ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ To Unsubscribe: https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus
