[Swift-devel] Swift 0.6 released

[Ben Clifford]

Swift 0.6 is online for download at 
http://www.ci.uchicago.edu/swift/downloads/

In addition to a bunch of bugfixes, the most interesting changes are:

 * much more rigourous compile time type checking - this catches many
   more errors at the start rather than hours into a run, and gives more
   useful error reports.

 * better multisite handling:
     +  job replication - when a job has been queued for much longer than 
        average, Swift can launch a replica of the job on another site. 
        This helps when making multisite runs where one site has a much
        longer queue time than another.
     +  rate limiting for bad sites - poorly scored sites are now rate
        limited much more than in previous versions of Swift, with very
        poorly scored sites being delayed between executions.

 * cog coasters - this is a new execution provider that allows a single
   'coaster' job to be submitted per worker node which pulls in Swift 
   jobs. This can greatly reduce the number of jobs submitted to the
   underlying job submission mechanism (such as GRAM2) allowing more jobs 
   to be submitted; it also can reduce the amount of time jobs spend in
   the LRM queue by sending them directly to an already-executing coaster.


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