[Boxbackup-dev] [Box Backup-commit] COMMIT r2817 - box/invisnet/perfhack1/lib/server

[Martin Ebourne]

On Sat, 2010-12-04 at 01:13 +0000, Charles Lecklider wrote:
> > Certainly tcp nodelay is not going to be relevant on the LAN usage case
> > which as already discussed is very slow.
> 
> It more than quadrupled the backup speed of a Maildir over a Gbit LAN.
> In other more normal usage it won't change much.
> 
> > Sounds to me if verify is slow over a long distance link rather than
> > disabling nagle it would be worth reworking the protocol to reduce round
> > trips.
> 
> I intend to make it an option, not the default - it only makes a
> difference on a LAN.

That's somewhat surprising, and contrary to normal expectation. Did you
figure out the reason why this is? Would be interesting to analyse a
packet captures to understand this fully.

Cheers,
Martin