| From: | Fujii Masao <masao(dot)fujii(at)gmail(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Proposal for 9.1: WAL streaming from WAL buffers |
| Date: | 2010-06-11 13:57:48 |
| Message-ID: | AANLkTikwlfohnfdXgM9enNKLPYaQ31ya0-kN5lwL9Wno@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Jun 11, 2010 at 10:22 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> On Fri, Jun 11, 2010 at 9:14 AM, Fujii Masao <masao(dot)fujii(at)gmail(dot)com> wrote:
>> Thought? Comment? Objection?
>
> What happens if the WAL is streamed to the standby and then the master
> crashes without writing that WAL to disk?
What are you concerned about?
I think that the situation would be the same as 9.0 from users' perspective.
After failover, the transaction which a client regards as aborted (because
of the crash) might be visible or invisible on new master (i.e., original
standby). For now, we cannot control that.
Regards,
--
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center
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