[Swift-devel] Clustering and Temp Dirs with Swift

[Ben Clifford]

any sequential numbering relies on having a global lock on a sequence 
counter.

if we're expecting workflow log names to be unique amongst all workflow 
runs ever (which I believe to be desirable) then there needs to be a 
global shared counter variable between all instances of swift running 
anywhere. that's lame.

having a large value space and picking numbers in there very sparsely (eg 
timestamp + some random ID) is very scalable in this situation.

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