From: Bruce Momjian <bruce@momjian.us>
To: Ravi Krishna <s.ravikrishna@aim.com>
Cc: tgl@sss.pgh.pa.us
Cc: pgsql-admin@postgresql.org
Subject: Re: WAL and O_DIRECT
Date: Thu, 14 May 2015 11:53:38 -0400
Message-ID: <20150514155338.GA23739@momjian.us> (raw)
In-Reply-To: <14d530df35f-2108-30ce7@webstg-m03.mail.aol.com>
References: <20588.1431616292@sss.pgh.pa.us>
<14d530df35f-2108-30ce7@webstg-m03.mail.aol.com>
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-admin>
On Thu, May 14, 2015 at 11:32:12AM -0400, Ravi Krishna wrote:
> Aha that pretty much explains it. Yes we are using streaming replication.
>
> However our DB2 folks are raising a concern that PG WAL writes may not be crash
> safe, unless we are using write back technology in SAN or SSD , which we are
> using.
We write WAL to the kernel, then issue fsync.
--
Bruce Momjian <bruce@momjian.us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ Everyone has their own god. +
--
Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-admin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-admin@postgresql.org
Cc: bruce@momjian.us, s.ravikrishna@aim.com, tgl@sss.pgh.pa.us
Subject: Re: WAL and O_DIRECT
In-Reply-To: <20150514155338.GA23739@momjian.us>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox