[ILUG] ftp.heanet.ie

[Paul Jakma]

On Tue, 13 Jan 2004, Colm MacCarthaigh wrote:

> It's about the same; which is very :)

avoid it so, go with opteron. :)

> Actually, I turn sendfile() off, because it breaks TCP checksums in
> IPv6 on our hardware,

Ah, ouch. Shame there doesnt appear to be a way to turn hardware 
csums on/off on a per protocol or socket basis.

> but we use mmap() instead - which does avoid
> bounce-buffering :)

Hmm, wow. Any pointers on how that's achieved?

> thousand users. Our limits are more in terms of number of users,
> we can't scale to tens of thousands of users, which is where
> we need to be next :)

Congrats anyway. You should write up a paper on this, "Tuning the
b*llocks out of linux: How heanet got Linux to scale to thousands of
connections and ~500MBit/s sustained rsync, ftp and http traffic" :)

regards,
-- 
Paul Jakma	paul at clubi.ie	paul at jakma.org	Key ID: 64A2FF6A
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