[kudu-CR] KUDU-3195: flush when any DMS in the tablet is older than the time threshold

["Andrew Wong (Code Review)" <ge...@cloudera.org>]

Hello Kudu Jenkins, Grant Henke, 

I'd like you to reexamine a change. Please visit

    http://gerrit.cloudera.org:8080/16581

to look at the new patch set (#3).

Change subject: KUDU-3195: flush when any DMS in the tablet is older than the time threshold
......................................................................

KUDU-3195: flush when any DMS in the tablet is older than the time threshold

Currently each tablet will wait at least 2 minutes between flushing
DMSs, even if there are several DMSs that are older than 2 minutes. This
means that for tablets with several dozen rowsets and updates across the
entire tablet, it may take hours to flush all the deltas.

Rather than waiting for 2 minutes since the last flush time before
considering time-based flushing, this patch tracks the creation time of
every DMS and flushes as long as there is a DMS that is older than 2
minutes in the tablet.

Change-Id: Id05202bf6a4685f4d79db11ef8ebb0f91f6316b4
---
M src/kudu/tablet/delta_tracker.cc
M src/kudu/tablet/delta_tracker.h
M src/kudu/tablet/deltamemstore.cc
M src/kudu/tablet/deltamemstore.h
M src/kudu/tablet/diskrowset.cc
M src/kudu/tablet/diskrowset.h
M src/kudu/tablet/memrowset.h
M src/kudu/tablet/mock-rowsets.h
M src/kudu/tablet/rowset.h
M src/kudu/tablet/tablet.cc
M src/kudu/tablet/tablet.h
M src/kudu/tablet/tablet_replica_mm_ops.cc
M src/kudu/tablet/tablet_replica_mm_ops.h
M src/kudu/tserver/tablet_server-test.cc
14 files changed, 184 insertions(+), 111 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/81/16581/3
-- 
To view, visit http://gerrit.cloudera.org:8080/16581
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Id05202bf6a4685f4d79db11ef8ebb0f91f6316b4
Gerrit-Change-Number: 16581
Gerrit-PatchSet: 3
Gerrit-Owner: Andrew Wong <aw...@cloudera.com>
Gerrit-Reviewer: Grant Henke <gr...@apache.org>
Gerrit-Reviewer: Kudu Jenkins (120)