Re: enabling dnfs when it's not being used

From: Kevin Jernigan <kevin.jernigan_at_oracle.com>
Date: Tue, 17 Feb 2015 20:45:10 -0800
Message-ID: <54E418D6.70908_at_oracle.com>

There are no downsides to enabling dNFS and then not using it...KJ

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Kevin Jernigan
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Compression (HCC), Database File System
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On 2/17/15 11:40 AM, Martin Berger wrote:


> to close this Q (for the records) Kevin Closson told us offline any 

> ODM code is just not used if not needed.

> So no bugs should be added without need.

>

> Martin

>

> On Fri, Feb 6, 2015 at 3:21 PM, Jeremy Schneider 

> <jeremy.schneider_at_ardentperf.com 

> <mailto:jeremy.schneider_at_ardentperf.com>> wrote:

>

>     This is where my knowledge of ODM is a little lacking.  Once you link

>     an ODM library, wouldn't _all_ I/O calls go through the ODM library

>     even if it doesn't do anything but pass through to kernel I/O

>     functions?  In other words, by simply linking in the dNFS ODM library

>     could you be exposed to any potential bugs in the ODM library?

>     --

>     http://about.me/jeremy_schneider

>

>

>     On Fri, Feb 6, 2015 at 9:15 AM, Martin Berger

>     <martin.a.berger_at_gmail.com <mailto:martin.a.berger_at_gmail.com>> wrote:

>     > As long as you do not need any other ODM library in those setups

>     I assume it

>     > just doesn't matter.

>     > If the code is not used at all, only the mapped .so in memory

>     might differ

>     > in size. But I hope you do not need those few kb saved.

>     >

>     >  Martin

>     >

>     > On Fri, Feb 6, 2015 at 3:02 PM, Jeremy Schneider

>     > <jeremy.schneider_at_ardentperf.com

>     <mailto:jeremy.schneider_at_ardentperf.com>> wrote:

>     >>

>     >> does anyone know any downsides to enabling dnfs when it's not being

>     >> used?  (i.e. the db is using regular local filesystem and/or ASM.)

>     >>

>     >> context is that i create standard builds which get cloned to a

>     whole

>     >> bunch of environments.  i have a few environments that use dNFS and

>     >> i'm thinking about just enabling it by default in my standard build

>     >> that gets pushed everywhere.  my heaviest workload environments

>     don't

>     >> use dNFS and currently it's not enabled on those homes; i'm

>     wondering

>     >> if there would be any potential risk to enabling it there.

>     >>

>     >> -Jeremy

>



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Received on Wed Feb 18 2015 - 05:45:10 CET