Hello Dan Burkert,
I'd like you to do a code review. Please visit
http://gerrit.cloudera.org:8080/4184
to review the following change.
Change subject: consensus: improve log messages for lagging or tablet-copying
peers
......................................................................
consensus: improve log messages for lagging or tablet-copying peers
This patch improves the log throttling utility code so that it supports
a user-defined "throttler" instance. It then uses a throttler for each
consensus peer in order to improve the logging:
- we used to spew "Successfully read <N> ops from disk" messages out of
log_cache.cc when we were reading messages for a lagging peer. This
message was not that useful, considering it didn't tell us which peer
was lagging. This is now replaced by a specific (and throttled)
message letting us know which peer is lagging and how far behind they
are.
Unfortunately the "how far behind" is only in terms of op indexes and
not time, since we don't attach any wall time to ReplicateMsgs. Still,
this is better than we had before.
- we used to spew "Sending request to start Tablet Copy" if a peer was
already in the process of copying. This log message is relocated and
also now throttled to once every few seconds.
Change-Id: I4dd560309841ba738b031ea87b12f8f612e6c674
---
M src/kudu/consensus/consensus_peers.cc
M src/kudu/consensus/consensus_queue.cc
M src/kudu/consensus/consensus_queue.h
M src/kudu/consensus/log_cache.cc
M src/kudu/util/logging-test.cc
M src/kudu/util/logging.h
M src/kudu/util/logging_test_util.h
7 files changed, 116 insertions(+), 16 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/84/4184/1
--
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Gerrit-MessageType: newchange
Gerrit-Change-Id: I4dd560309841ba738b031ea87b12f8f612e6c674
Gerrit-PatchSet: 1
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: Todd Lipcon <t...@apache.org>
Gerrit-Reviewer: Dan Burkert <d...@cloudera.com>
