Coda File System

Re: CODA clients implement incoming TCP connections from CODA server??

From: Peter J. Braam <>
Date: Mon, 25 Jan 1999 09:23:31 -0500 (EST)
Our Bandwidth is up to 4MB/sec (bytes)  on 100BT.  Not great, but decent.
Coda's slow performance hinges on different things at the moment.  Given
that we have made much progress in stability going to 5.0 there might just
be a bit of time available this spring to speed one or two things up a

- Peter -

On 25 Jan 1999, Magnus Ahltorp wrote:

> > > Among other things, if TCP had been used, the servers would have to
> > > have a connection open (with a corresponding fd) to each client. Since
> > > UDP is used, the servers demultiplexes the requests themselves.
> > 
> > The number of fd should not be a problem anymore on modern unix systems.
> It's a problem that select is O(n).
> > How does the choice udp/tcp affect performance (latency and bandwidth)?
> Since no TCP connection has to be established, latency is improved in
> a UDP solution. I don't think either RPC2 or rx are great bandwidth
> consumers. There are TCP-like mechanisms in the RPC protocols.
> /Magnus
Received on 1999-01-25 09:24:42