[OpenAFS] Re: dropbox semantics ("irl")
Derrick J Brashear
Thu, 31 May 2007 10:32:51 -0400 (EDT)
On Thu, 31 May 2007, Jeffrey Altman wrote:
> Adam Megacz wrote:
>> Perhaps a time limit would also make sense (if file's modification
>> time is more than 1 hour prior to now, refuse all storedata's, even
>> beyond the end of the file).
> This would be inappropriate for logging.
> This is not something that can be fixed on the file server given the
> lack of a "file handle" equivalent issued by the file server. That is
> why the semantics of insert are enforced by the clients.
> You can't even enforce "append-only" on the file server because there is
> no guarantee that clients will write dirty chunks to the file server in
> a particular order.
if you define "append" as "only write to parts of the file which have no
data yet" you can