[OpenAFS] OpenAFS or Coda?

[Derrick J Brashear]

On Sat, 7 Dec 2002, Michael Loftis wrote:

> The delay of writing 100+MB files out across the T-1 wouldn't be 
> acceptable.  The writes occur pretty equally at both sites, with no clear 
> winner on that.

then i think you need something neither has, but coda could have more
easily (if it doesn't; it might): lazy replication. write the file to the
local replica and let it propagate later. this means no strong coherency.

> So am I right in understanding that AFS doesn't allow multiple RW replicas? 

correct

> You have one 'master' RW, then other RO replicas, and when a write occurs, 
> what, the whole file goes upstream, or only the changes from the clients 

it depends how you changed it.

> cache?  I understand the difficulties in having multiple RW replicas, the 
> locking issues, etc, but the concern is to try and keep from transmitting 
> entire 100MB files all the time and to allow both teams to work efficiently.