Re: 3 par recovery manager for Oracle (HP Product)
Date: Wed, 15 Jan 2014 11:55:16 -0500
Message-ID: <CAE-dsOJvX4Cp-ey2ADPwTX+vYiHs802hov2_DrPGR2TY5nLFVg_at_mail.gmail.com>
So if I am using ASM. Would I see the 1 TB of data in my mpath file system?(we use redhat) So I can make a 1 TB ASM diskgroup, but behind the seens I would only get 200 gb? Then leave autoextend on and as I grow get allocated more space?
There is an oracle white paper about thin provisioning with ASM. I am trying to understand this.
The impression I got is that the SAN engineer sets this up at the LUN level and presents this to your server in the mpath file, but your really not getting that much space. Its in a pool that can be used by other servers, etc...
One concern I had with this is the the performance hit from incrementally requesting more space from the SAN if I have a fast growing DB. The oracle white paper touched on this briefly by saying you can configure 3par with how much you request at a time. I also don't know if this can lead to a bottleneck if there are several servers requesting space from the same LUN at the same time.
My SAN knowledge is rudimentary.
On 1/14/14, Mark Bobak <Mark.Bobak_at_proquest.com> wrote:
> Thin provisioning just means that not all the space that the storage array
> has promised you, is actually reserved and allocated to you.
>
> If devices are thin provisioned, you could ask for 1TB of storage, and you'd
> think, from the host's point of view, that you have 1TB of storage. But, if
> you've only used 200GB, that's all the array has allocated to you.
>
> -Mark
>
> From: Dba DBA
> <oracledbaquestions_at_gmail.com<mailto:oracledbaquestions_at_gmail.com>>
> Reply-To:
> "oracledbaquestions_at_gmail.com<mailto:oracledbaquestions_at_gmail.com>"
> <oracledbaquestions_at_gmail.com<mailto:oracledbaquestions_at_gmail.com>>
> Date: Tuesday, January 14, 2014 at 11:30 AM
> To: ORACLE-L <oracle-l_at_freelists.org<mailto:oracle-l_at_freelists.org>>
> Subject: Re: 3 par recovery manager for Oracle (HP Product)
>
> our SAs are talking about something called 'thin provisioning'. I have not
> had a chance to dig into that.
>
>
-- http://www.freelists.org/webpage/oracle-lReceived on Wed Jan 15 2014 - 17:55:16 CET