[pgpool-hackers: 2268] Re: [pgpool-committers: 3978] pgpool: Implement infrastructure for supporting per node health check p

[Tatsuo Ishii]

In this implementation, I have removed "failback to template1 database
if postgres database does not exist while doing health check"
feature. The reasons are:

- It is pretty rare that the database postgres does not exist.
- Even if the case, user can specify alternate database.
- The failback feature makes the code complex and reduces maintainability
  and reliability.

For now, the code works as follows:

- If health check database is specified, use it.

- If health check database is not specified (i.e. empty), use postgres
  database instead.

If there's no objection, I would like to go forward this way (no
failback feature).

Best regards,
--
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese:http://www.sraoss.co.jp

> Implement infrastructure for supporting per node health check parameters.
> 
> Now pgpool main process forks health check process for each DB node.
> Also autotools is now updated from 1.14 to 1.15.
> 
> TODO:
> - Implement per node health check parameters.
> 
> Branch
> ------
> master
> 
> Details
> -------
> https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=127e64fa52fe2ad2337eea5d55a0b8104f0a4df6
> 
> Modified Files
> --------------
> Makefile.in                         |  49 +++--
> aclocal.m4                          |  71 ++++----
> configure                           |  85 +++++----
> doc.ja/Makefile.in                  |  24 ++-
> doc.ja/src/Makefile.in              |  24 ++-
> doc.ja/src/sgml/Makefile.in         |  24 ++-
> doc/Makefile.in                     |  24 ++-
> doc/src/Makefile.in                 |  24 ++-
> doc/src/sgml/Makefile.in            |  24 ++-
> src/Makefile.am                     |   1 +
> src/Makefile.in                     |  34 +++-
> src/include/Makefile.in             |  25 ++-
> src/include/pool.h                  |   4 +-
> src/libs/Makefile.in                |  24 ++-
> src/libs/pcp/Makefile.in            |  27 ++-
> src/main/health_check.c             | 352 ++++++++++++++++++++++++++++++++++++
> src/main/pgpool_main.c              | 247 +++++--------------------
> src/parser/Makefile.in              |  26 ++-
> src/protocol/pool_connection_pool.c |  17 +-
> src/tools/Makefile.in               |  25 ++-
> src/tools/pcp/Makefile.in           |  25 ++-
> src/tools/pgmd5/Makefile.in         |  26 ++-
> src/watchdog/Makefile.in            |  25 ++-
> 23 files changed, 815 insertions(+), 392 deletions(-)
>