On 2013-02-28 6:55, list@airstreamcomm.net wrote:
I have to +1 Nikolaos' sentiment for a geographically distributed mail cluster, we have been hoping for a Dovecot solution to this problem for the last few years.
I am using that solution over a year now. Both mail servers have been running ~500 km apart. Regular mail traffic is very low, though, only a couple of users and ~1000 mails a day.
I haven't been using such an elaborate test scenario you are describing here, but I did test dsync with huge loads of locally injected messages (100000 messages at either site, or simultaneously). Thus, I am very much interested in your stress test results simulating a real world scenario in a much better way than my more ore less lab- like scenario, only.
As Timo mentioned before, there have been bugs (especially with v2.1), but I never ever lost a single mail since starting dsync replication. Main issues have been duplicates, instead, and this is history after all those improvements Timo has achieved in v2.2.
Thus, whoever is interested in a cheap man's fail-over mail cluster with geographically distributed servers and moderate load, I would encourage to consider and test replicator/dsync v2.2, now.
Just my two cents, Michael