[Swift-devel] Re: replication vs site score

[Ben Clifford]

On Mon, 6 Apr 2009, Mihael Hategan wrote:

> I'm still not following. From what I understand, you are suggesting
> what's already there. So either that is true and you think the current
> scheme is not what it is, or I don't understand how your suggestion is
> different than the current scheme. 

Its not the case, as I understand it, that replica jobs will always be run 
after primary jobs - they will be run in the order they arrive in the job 
queue. Jobs that Swift puts in the queue after that replication decision 
has been made (for example, jobs that were waiting for dependent data) 
will run after the replicas submitted before that dependent data become 
available.

 a=p(x)
 b=p(y)
 c=q(a);

a, b run. eventually swift gets bored and resubmits b to the local job 
queue. then a completes, and so c gets queued in the local job queue.

replica_of_b gets submitted to a site before c does.

or not?

--