Todd Lipcon has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/9327 )

Change subject: KUDU-2297 (part 2). Convert diagnostics log to a format closer 
to glog
......................................................................

KUDU-2297 (part 2). Convert diagnostics log to a format closer to glog

Previously the metrics/diagnostics log used a custom log format designed
to be readable by scripts. The only timestamps were unix microtimes,
which are convenient for computers but not for people. In order to make
the log more easily greppable, this patch converts it over to use a
glog-compatible prefix on each log line.

The aim is that, if an admin sees some issues at 10/23 15:03 they can simply
grep the diagnostics log for '1021 15:0[0-6]' rather than having to go
figure out the appropriate range of numeric timestamps.

This patch also updates the docs accordingly.

Change-Id: I10d93c84f8c738c26850ae3d1ae6afbb5519c7ad
Reviewed-on: http://gerrit.cloudera.org:8080/9327
Tested-by: Todd Lipcon <t...@apache.org>
Reviewed-by: Mike Percy <mpe...@apache.org>
---
M docs/administration.adoc
M src/kudu/server/diagnostics_log.cc
M src/kudu/util/logging.cc
M src/kudu/util/logging.h
M src/kudu/util/trace.cc
5 files changed, 46 insertions(+), 29 deletions(-)

Approvals:
  Todd Lipcon: Verified
  Mike Percy: Looks good to me, approved

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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: I10d93c84f8c738c26850ae3d1ae6afbb5519c7ad
Gerrit-Change-Number: 9327
Gerrit-PatchSet: 9
Gerrit-Owner: Todd Lipcon <t...@apache.org>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Mike Percy <mpe...@apache.org>
Gerrit-Reviewer: Tidy Bot
Gerrit-Reviewer: Todd Lipcon <t...@apache.org>
Gerrit-Reviewer: Will Berkeley <wdberke...@gmail.com>

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