|
|I'm considering LVS as a replacement to Cisco LocalDirectors to front
|several SMTP server farms. Due to customer-end constraints we
|need to do
|this via NAT. Target throughput is up to 40 Mbps. Is this
|realistic? LVS
|hardware is likely to be twin 1GHz Pentiums.
|
40mbps sounds all right on dual-1ghz box, assuming you use later 2.4 kernel
on your director. Be very stingy on your NICs.. for example eepro100's seem
to historically be 'uncertain' with high bandwidth..
I haven't seen a "gauranteed" figure with newer 2.4 kernels. However,
lurking on the mailing list for a year or so now has led me to believe that
the key LVS people now believe NAT (with 2.4 kernel) to perform similar to
DR. LVS-DR easily exceeds 40mbs, assuming you have decent hardware.
some probably outdated performance evaluations:
http://www.linuxvirtualserver.org/Joseph.Mack/performance/single_realserver_
performance.html
and
http://www.linuxvirtualserver.org/Documents.html#manuals (look under
performance)
===
bottom line : if I were you, I would have a basic assumption that it will
perform and proceed directly to your testing of LVS-NAT and see if it does.
It would only take 2-3 days and could possibly save you lots of $.
Peter
|
