| From: | marcin mank <marcin(dot)mank(at)gmail(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Proposal for 9.1: WAL streaming from WAL buffers |
| Date: | 2010-07-08 03:52:14 |
| Message-ID: | AANLkTim_kUfYXzvnlR5u_qhA5cHeaYvJFAdUaxssdRyb@mail.gmail.com |
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| Lists: | pgsql-hackers |
> Having said that, I do think we urgently need some high-level design
> discussion on how sync rep is actually going to handle this issue
> (perhaps on a new thread). If we can't resolve this issue, sync rep
> is going to be really slow; but there are no easy solutions to this
> problem in sight, so if we want to have sync rep for 9.1 we'd better
> agree on one of the difficult solutions soon so that work can begin.
>
When standbys reconnect after a crash, they could send the
ahead-of-the-master WAL to the master. This is an alternative to
choosing the most-ahead standby as the new master, as suggested
elsewhere.
Greetings
Marcin Mańk
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