[jboss-dev-forums] [Design of Messaging on JBoss (Messaging/JBoss)] - Re: Journal Clean up / Compactor

[clebert.suconic@jboss.com]

The problem is when one record is *not* deleted.

f1: A1, A2    (A2 won't be deleted for a while)

f2: D1, A3, A4

f3: D3, D4 A5 A6

f4: D5, D6, A7, a8

f5: d7, d8, A9, A10


F2 won't be reclaimed because f1 is not completed yet. F3 won't be reclaimed because it has waiting records on F2... F4->F3, F5->F4


If I phisically removed A1 from f1 (as it is deleted & confirmed already), f2, f3, f4 and f5 will be instantly reclaimable.



That's the common scenario that would break reclaiming. 

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