/** * Modifies the per-CF dirty cursors of any commit log segments for the column family according to * the position given. Discards any commit log segments that are no longer used. * * @param cfId the column family ID that was flushed * @param context the replay position of the flush */ public void discardCompletedSegments(final UUID cfId, final ReplayPosition context) { logger.trace("discard completed log segments for {}, table {}", context, cfId); // Go thru the active segment files, which are ordered oldest to newest, marking the // flushed CF as clean, until we reach the segment file containing the ReplayPosition passed // in the arguments. Any segments that become unused after they are marked clean will be // recycled or discarded. for (Iterator<CommitLogSegment> iter = allocator.getActiveSegments().iterator(); iter.hasNext(); ) { CommitLogSegment segment = iter.next(); segment.markClean(cfId, context); if (segment.isUnused()) { logger.trace("Commit log segment {} is unused", segment); allocator.recycleSegment(segment); } else { logger.trace( "Not safe to delete{} commit log segment {}; dirty is {}", (iter.hasNext() ? "" : " active"), segment, segment.dirtyString()); } // Don't mark or try to delete any newer segments once we've reached the one containing the // position of the flush. if (segment.contains(context)) break; } }