I have read several documents on the number of
concurrent https sessions a FreeBSD system is capable
of.
However, I wonder how well this relates to how many
ssh sessions (scp file transfers, specifically) that a
FreeBSD server can handle. Can anyone throw out some
basic numbers for this ? Assuming a 1ghz p3 and 2gigs
of RAM, and assuming that everyone is transferring a
totally different file. (so there is no amount of
cache hits - everything comes straight off the drives)
I would think the major bottleneck would be disk - you
would start chugging the disks far before you used up
all the CPU on a 1ghz p3 ... but what is the second
bottleneck ? Is it cpu, or is it ram (or mbufs, etc.)
Would it be a reasonable test to just start up scp
sessions from the machine to itself and then divide
the number of sessions you can acceptably create by
the number 2 ? Or is this somehow a flawed test ?
Any additional comments (kernel tunes, settings, war
stories) are greatly appreciated.
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