Hi, Dmitriy, to wait for memory freeing we have method org.apache.ignite.internal.processors.igfs.IgfsEx#awaitDeletesAsync() which returns a Future that can be awaited (with a timeout or without). Also during recent fix https://issues.apache.org/jira/browse/IGNITE-1510 we introduced new method IgfsEx#clear(IgfsPath) that deletes the specified path and waits for the garbage data cleanup. These methods have more or less convenient usage pattern. But it is much more difficult to use PURGE events in practice. E.g. how to know how many events to expect, and how to track what events have arrived, and what have not?
On Fri, Nov 20, 2015 at 9:10 PM, Dmitriy Setrakyan <dsetrak...@apache.org> wrote: > Ivan, > > The importance of the PURGE event has to do with notification about freeing > memory, otherwise occupied by a deleted file. > > How hard do you think would be making the PURGE behavior consistent between > directory and file deletions? > > D > > On Fri, Nov 20, 2015 at 8:15 AM, Ivan V. <iveselovs...@gridgain.com> > wrote: > > > Hi, dev, > > need opinions on the question discussed in > > https://issues.apache.org/jira/browse/IGNITE-1679 (IGFS: Purge event is > > inconsistent). > > In short: in Igfs we have "soft" delete that moves the deleted file or > > folder to special "TRASH" folder. > > Special async worker walks inside TRASH and removes the items > permanently. > > When an item is completely removed, an event of type > > org.apache.ignite.events.EventType#EVT_IGFS_FILE_PURGED is fired. > > But such events are now fired only for files, and only in case if such > file > > was deleted itself, but not a part of a folder sub-tree. It's quite > obvious > > that such behavior is not quite consistent, so we should either get rid > of > > PURGE events at all, or make them consistent. > > In the latter case it would be good to have answer to the question: what > > are real use cases when we may need the purge events ? (Now they seem to > > be used in tests only). > > If we don't have such real use cases, are there any objections to get rid > > of the purge events at all? > > Thanks in advance. > > >
