Bill Campbell writes:
Cyrus scaling?
We currently user Courier and so far I am far from impressed with it's
scalability.
We have NFS servers for the storage and then front end machines for the
POP/IMAP connections. The footprint per connection is about 3MB to 5MB on
the client. On a machine with 2GB that means about 600 connections... but
the machines usually are dying around 400 connections.
Perhaps on one mongo server.
I have read totally the opposity that the only way to scale a mail setup
beyond 10s of thousands is with Cyrus .. or some other propietary system.
Have note read of any truly large Courier installation.
imap from a central server housing home directories, and have
seen essentially linear performance as servers are added.
How many connections can you handle per "front-end" machine?
What type of configuration? I inheritted the setup I am working with and
little by little we are building things "right".. including better mail
store machines.
Also as part of the initial question was which sysctl/kernel settings are
usefull in dedicated mail clients/servers
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