On Tue, Nov 16, 1999 at 12:56:12PM +0100, Marthe Nes�en Gangfl�t wrote:
> Hi people,
>
> I need benchmarks and such to show my employer that Linux can rock mail
> better than NT Exchange (dohh). We use RedHat Linux and qmail for this,
> because that's where we have knowledge. This is somehing we might sell to
> customers of ours, and it's about 2000-5000 pop-users.. Can qmail manage
> that much on ONE single server?
I can't speak for Exchange; nor can I speak for pop-users specifically.
However, I have no qualms about qmail scaling that high. On our network, we
have two qmail machines: a main relay server and an ezmlm ml server. Neither
machine delivers anything local, so all deliveries are "remote" (even if on
the same network).
Here is the output from `zcat qmail-19991115.gz|localtai|matchup|zoverall`:
[ relay server ]
Completed messages: 50939
Recipients for completed messages: 191315
Total delivery attempts for completed messages: 200494
Average delivery attempts per completed message: 3.93596
Bytes in completed messages: 339800621
Bytes weighted by success: 917491749
Average message qtime (s): 180.223
Total delivery attempts: 224784
success: 197167
failure: 7485
deferral: 20132
Total ddelay (s): 17580934.661599
Average ddelay per success (s): 89.167734
Total xdelay (s): 1606541.947916
Average xdelay per delivery attempt (s): 7.147048
Time span (days): 0.993594
Average concurrency: 18.7141
[ ezmlm server ]
Completed messages: 4786
Recipients for completed messages: 5319
Total delivery attempts for completed messages: 5415
Average delivery attempts per completed message: 1.13142
Bytes in completed messages: 26064596
Bytes weighted by success: 27721323
Average message qtime (s): 112.261
Total delivery attempts: 74849
success: 62120
failure: 1960
deferral: 10769
Total ddelay (s): 19233264.798056
Average ddelay per success (s): 309.614694
Total xdelay (s): 661400.438022
Average xdelay per delivery attempt (s): 8.836463
Time span (days): 0.983027
Average concurrency: 7.78727
The hardware/software for each:
[ relay ]
AMD K6-2 333
384MB RAM
UW SCSI disk on Buslogic controller
True tulip 100bTX NIC on 3com 10/100 switch, full-dup
RH6 w/ 2.2.13 kernel
qmail-1.03 + jbuce.diff + newlines.patch
[ ezmlm ]
Dual P90 EISA
128MB RAM
FW SCSI disk on Adaptec 2940
3com 3c509 10bT on 3com 10/100 switch
RH6 w/ 2.2.10 SMP kernel
qmail-1.03 + jbuce.diff + newlines.patch
ezmlm+idx-0.322
The relay machine is also our primary name server; the ezmlm machine (made
entirely out of "junk" parts) also serves a little news with INN. I'd say a
couple of thousand POP accounts are not totally unheard of... :)
/pg
--
Peter Green
Gospel Communications Network, SysAdmin
[EMAIL PROTECTED]
