Re: 10g show stoppers

From: Tanel Põder <tanel.poder.003_at_mail.ee>
Date: Thu, 1 Jul 2004 22:05:54 +0300
Message-ID: <06d501c45f9e$7090b620$a9879fd9@porgand>

ASM is using raw devices. It's not possible to (simply) extract datafiles nor archivelogs from an ASM managed device, but Oracle knows the internal format of the it and knows where the blocks of its "files" are stored on the device.

You can use RMAN to back up archivelogs and datafiles from an ASM device, no OS copying is allowed.

I personally do like ASM and haven't seen any showstopper-bugs, but I've not implemented a large RAC+ASM in production yet, only few two node ones on linux servers (I don't trust OCFS, I have seen too much trouble with it).

Tanel.

Original Message ----- From: "Ron Rogers" <RROGERS_at_galottery.org> To: <oracle-l_at_freelists.org> Sent: Thursday, July 01, 2004 9:45 PM Subject: Re: 10g show stoppers

> Tanel,
> If I understand your statement, ASM can handle file systems?
> Or is the ASM using raw and knows to keep track of the archlog
> nomenclature internally
> and place the logs where it may but make them appear as cooked?
> Ron
>
> >>> tanel.poder.003_at_mail.ee 07/01/2004 2:32:51 PM >>>
> > You always want archived logs on a filesystem. The archiver expects
> to
> > write the sequence of archived logs to the same directory. Not sure
> how
> > you could do anything else but put archived logs on a filesystem.
>
> In 10g you can place archivelogs to ASM managed "directory", you just
> include a + sign in beginning of log_archive_dest_x p
arametersvalue,tospecifythatwearedealingwithASMvolumeinsteadofaregulardirect

ory.Tanel.----------------------------------------------------------------Pl
easeseetheofficialORACLE-LFAQhttpwww.orafaq.zl6-----------------------------
-----------------------------------

> To unsubscribe send email to: oracle-l-request_at_freelists.org
> put 'unsubscribe' in the subject line.
> --
> Archives are at http://www.freelists.org/archives/oracle-l/
> FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html
> -----------------------------------------------------------------
> ----------------------------------------------------------------
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> ----------------------------------------------------------------
> To unsubscribe send email to: oracle-l-request_at_freelists.org
> put 'unsubscribe' in the subject line.
> --
> Archives are at http://www.freelists.org/archives/oracle-l/
> FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html
> -----------------------------------------------------------------
>

Please see the official ORACLE-L FAQ: http://www.orafaq.com

To unsubscribe send email to: oracle-l-request_at_freelists.org put 'unsubscribe' in the subject line.

--
Archives are at http://www.freelists.org/archives/oracle-l/
FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html
-----------------------------------------------------------------

Received on Thu Jul 01 2004 - 14:22:19 CDT