26 Nov
2016
26 Nov
'16
6:22 p.m.
Den 25. nov. 2016 14:29, skrev Miloslav Hůla:
Hi,
we are planning to change hardware for our standalone Dovecot instance handling ~5800 IMAP users with 1TB mailboxes on local RAID. Is there some recommendation about CPU?
We can choose from:
- Intel Xeon E5-2620v4 - 2,1GHz@8,0GT 20MB cache, 8core, HT, 85W, LGA2011
- Intel Xeon E5-2623v4 - 2,6GHz@8,0GT 10MB cache, 4core, HT, 85W, LGA2011
The difference is about more cores vs. hi frequency. As far as I can see, high frequency costs more than more cores, so the 2623 is more geared towards interactive use, or single-threaded servers (like a single java thread). 50% reduction in number of cores gets you only a few percent increase in frequency. Go with 2620 for mail server.