| From: | Fujii Masao <masao(dot)fujii(at)gmail(dot)com> |
|---|---|
| To: | Aidan Van Dyk <aidan(at)highrise(dot)ca> |
| Cc: | Greg Smith <greg(at)2ndquadrant(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: write ahead logging in standby (streaming replication) |
| Date: | 2009-11-13 02:20:16 |
| Message-ID: | 3f0b79eb0911121820p2eae030aq9a8a638c7ade231a@mail.gmail.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Fri, Nov 13, 2009 at 10:58 AM, Aidan Van Dyk <aidan(at)highrise(dot)ca> wrote:
> * Fujii Masao <masao(dot)fujii(at)gmail(dot)com> [091112 20:52]:
>
>> Personally, I think that
>> semi-synchronous replication is sufficient for HA.
>
> Often, but that's not synchronous replication so don't call it such...
Hmm, though I'm not sure about your definition of "synchronous",
if the primary waits for a *redo* ACK from the standby before
returning a "success" of a transaction to a client, you can call
SR synchronous?
This is one of TODO items of SR for v8.5.
Regards,
--
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Greg Stark | 2009-11-13 02:22:01 | Re: EOL for 7.4? |
| Previous Message | Bruce Momjian | 2009-11-13 02:15:40 | Re: next CommitFest |