| From: | Jan Wieck <JanWieck(at)Yahoo(dot)com> |
|---|---|
| To: | Darren Johnson <darren(at)up(dot)hrcoxmail(dot)com> |
| Cc: | Al Sutton <al(at)alsutton(dot)com>, Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, shridhar_daithankar(at)persistent(dot)co(dot)in, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [mail] Re: Big 7.4 items - Replication |
| Date: | 2002-12-16 03:40:17 |
| Message-ID: | 3DFD4B21.B9965A99@Yahoo.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Darren Johnson wrote:
> The group communication system doesn't just run on one system. For
> postgres-r using spread
The reason why group communication software is used is simply because
this software is designed with two goals in mind:
1) optimize bandwidth usage
2) make many-to-many communication easy
Number one is done by utilizing things like multicasting where
available.
Number two is done by using global scoped queues.
I add this only to avoid reading that pushing some PITR log snippets via
FTP or worse over a network would do the same. It did not in the past,
it does not do right now and it will not do in the future.
Jan
--
#======================================================================#
# It's easier to get forgiveness for being wrong than for being right. #
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