Re: UNIX file system read/write locks

Hi Tanel

Thanks for the reply.

For Solaris 8, I think from update 3 there is some workaround for this problem.

I was wondering because I have some customers who have a mount point per database, I am not sure for a busy database they would run into I/O problems?

Thanks

On 9/11/06, Tanel Poder <tanel.poder.003_at_mail.ee> wrote:
>
> The file level write locks still apply to many filesystems, even the ones
> which support direct IO.
>
> However, some vendors have introducted concurrent direct IO option into
> their filesystems.
> Solaris has CIO since some update of Solaris 8.
> I've used CIO option on AIX 5.2 as well.
>
> I haven't heard about CIO for Linux so I guess they don't have it.
>
> Also, you have to manually enable concurrent IO in filesystem mount
> options in order to use it.
>
> For Oracle 9.2 on AIX CIO stuff, read this article:
>
> http://www-03.ibm.com/servers/aix/whitepapers/db_perf_aix.pdf
>
> Tanel.
>
> ------------------------------
> *From:* oracle-l-bounce_at_freelists.org [mailto:
> oracle-l-bounce_at_freelists.org] *On Behalf Of *LS Cheng
> *Sent:* Monday, September 11, 2006 16:38
> *To:* _oracle_L_list
> *Subject:* UNIX file system read/write locks
>
> Hi
>
> I was wondering if UNIX/Linux filesystem read/write locks still applies in
> modern filesystems such as qfs/vxfs/OnlineJFS/ext2/ext3?
>
>
> Thanks
>
>
>
>

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