| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Ravi Krishna <s(dot)ravikrishna(at)aim(dot)com> |
| Cc: | tgl(at)sss(dot)pgh(dot)pa(dot)us, pgsql-admin(at)postgresql(dot)org |
| Subject: | Re: WAL and O_DIRECT |
| Date: | 2015-05-14 15:53:38 |
| Message-ID: | 20150514155338.GA23739@momjian.us |
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| Thread: | |
| Lists: | pgsql-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(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ Everyone has their own god. +
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