Coda File System

Re: FW: Coda in a web hosting environment

From: Ivan Popov <>
Date: Wed, 6 Nov 2002 08:39:33 +0100 (MET)

>     I'm setting up a webserver farm with 3 machines. 2 will be frontends
> with apache and one will be the storage server.
>     I was thinking about using NFS to do that, but maybe CODA will be a
> better solution?

it depends on your needs. NFS is surely easier to set up,
Coda has some limitations on storage space and implements no locking
(you may need it in case you are going to modify data via the web

You will face the need for either not using Coda access control at all
(pity?) or cache Coda tokens at the web server and arrange "personality
switching" depending on the users' authenticity. Quite doable of course.

In case you modify data from the webservers, as you have more than one
server, you users can create conflicting updates (and be effectively
locked out of the system until a manual intervention) - unless you prevent
it by some other means, say by implementing locking on CGI-script level.

Otherwise if your data is "readonly", you should be pretty safe with Coda
and enjoy its caching and server failure resilience.

Received on 2002-11-06 02:43:39