Merges and ticks
Wednesday, April 27, 2011
11:21 AM
Merges and ticks
A bloom program executes in ticks. 
Until a tick, all statements are considered to be declarations. 
At a tick, statements are executed and the results are cached. 
(Compare with pig's "store" command).
A tick is logically equivalent to a barrier synchronization, i.e., it waits for (eventual) consistency of the affected tables. 