On Wed, Apr 2, 2014 at 6:30 PM, Jukka Zitting <jukka.zitt...@gmail.com> wrote: > The inUse map is in FileDataStore for a reason.
Ack. From what I have understood from Blob GC logic in Oak is that it relies on blob last modified value to distinguish between active used blobs. So for performing GC only those blob would be considered whose lastModified value is say 1 day. Only these blobs would be candidate for deletion. This ensures that any blob created in transient space are not considered for GC. So current logic does make an assumption that 1 day is sufficient time and hence not foolproof. However the current impl of inUse would probably only work for a single node system and would fail for shared DataStore scenario as its an in memory state and its hard to determine inUse state for whole cluster. For supporting such case we would have to rely on lastModified time interval to distinguish between active used blobs regards Chetan Chetan Mehrotra
