| From: | Mark Lewis <mark(dot)lewis(at)mir3(dot)com> |
|---|---|
| To: | Dan Gorman <dgorman(at)hi5(dot)com> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Postgres fsync off (not needed) with NetApp |
| Date: | 2006-06-14 21:54:45 |
| Message-ID: | 1150322085.31200.39.camel@archimedes |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
No. You need fsync on in order to force the data to get TO the NetApp
at the right time. With fsync off, the data gets cached in the
operating system.
-- Mark Lewis
On Wed, 2006-06-14 at 14:48 -0700, Dan Gorman wrote:
> All,
> So I thought I'd pose this question:
>
> If I have a pg database attached to a powervault (PV) with just an
> off-the-shelf SCSI card I generally want fsync on to prevent data
> corruption in case the PV should loose power.
> However, if I have it attached to a NetApp that ensures data writes
> to via the NVRAM can I safely turn fsync off to gain additional
> performance?
>
> Best Regards,
> Dan Gorman
>
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 2: Don't 'kill -9' the postmaster
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