Re: Re: new high availability feature for the system with both asynchronous and synchronous replication

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: "Higuchi, Daisuke" <higuchi(dot)daisuke(at)jp(dot)fujitsu(dot)com>
Cc: "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Re: new high availability feature for the system with both asynchronous and synchronous replication
Date: 2017-03-02 09:49:06
Message-ID: CA+TgmoY0HKor-H=UqWjEGHdnYK+fYZQ9GrdTvSziOnFnB0nxtA@mail.gmail.com
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On Tue, Feb 28, 2017 at 10:26 AM, Higuchi, Daisuke
<higuchi(dot)daisuke(at)jp(dot)fujitsu(dot)com> wrote:
> I create POC patch for my proposal of new feature for high availability.
> I want to discuss about this feature. But this feature might be PG11
> because discussion is not enough.
>
> This patch enables walsender for async to wait until walsender for sync confirm
> WAL is flashed to Disk. This feature is activated when GUC parameter
> "async_walsender_delay" is set on.

So this new option makes asynchronous replication synchronous?

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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