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On Wed, 31 Oct 2001, Peter Mueller wrote:
> |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.
Given good network cards, on dual PIII @ 1Ghz you may try aggregating 2 or 3
FastEthernets using the bonding driver or you may try GigE. It certainly
does more than 100 Mbps, even with "bad" average packet size (e.g. 700 bytes)
Radu-Adrian Feurdean
mailto: raf @ chez.com
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