| From: | "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov> |
|---|---|
| To: | "Bruce Momjian" <bruce(at)momjian(dot)us> |
| Cc: | <jd(at)commandprompt(dot)com>,"Scott Marlowe" <scott(dot)marlowe(at)gmail(dot)com>, "Steve Crawford" <scrawford(at)pinpointresearch(dot)com>, <pgsql-performance(at)postgresql(dot)org>, "Ben Chobot" <bench(at)silentmedia(dot)com> |
| Subject: | Re: BBU Cache vs. spindles |
| Date: | 2010-10-21 17:15:15 |
| Message-ID: | 4CC02ED30200002500036C24@gw.wicourts.gov |
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| Lists: | pgsql-performance pgsql-www |
Bruce Momjian <bruce(at)momjian(dot)us> wrote:
> full_page_writes is designed to guard against a partial write to a
> device. I don't think the raid cache can be partially written to
So you're confident that an 8kB write to the controller will not be
done as a series of smaller atomic writes by the OS file system?
-Kevin
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