For everyone...

http://www.symantec.com/business/support/index?page=content&id=TECH51967

Hope it helps.

By the way, looks like up to 256 is ok now.

--tmac

Tim McCarthy

Principal Consultant

          

Clustered ONTAP                                                        Clustered ONTAP

 NCDA ID: XK7R3GEKC1QQ2LVD        RHCE5 805007643429572      NCSIE ID: C14QPHE21FR4YWD4

 Expires: 08 November 2014                 Expires w/release of RHEL7      Expires: 08 November 2014

On Wed, Feb 27, 2013 at 3:35 AM, Jayanathan, David <djayan@qualcomm.com> wrote:

Hi Tim,

 

This mail from you caught my eye because our backup environment heavily relies on NDMP and we are always looking for ways to improve it. Recently our backup team has started to change their architecture to do 3-way NDMP over 10GbE to a master server which has drives attached to it via tape SAN and has multiplexing/pooling enabled.

 

Were you able to dig up what specific environment variable you were thinking of to change the backup blocking factor?

 

Thanks in advance J

 

-David

 

From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of tmac
Sent: Wednesday, February 20, 2013 11:53 AM
To: Klise, Steve

Cc: toasters@teaparty.net
Subject: Re: NDMP speed question

 

You know, another way to speed up backup is to change the backup blocking factor.

 

I think the default is 63 and if you are going over the network, it is certainly feasible to make it 126.

 

If I recall, there is an environment variable that can be set/modified to change the blocking factor.

--tmac

 

Tim McCarthy

Principal Consultant

 

<~WRD000.jpg>     <~WRD000.jpg>     <~WRD000.jpg>

 

Clustered ONTAP                                                        Clustered ONTAP

 NCDA ID: XK7R3GEKC1QQ2LVD        RHCE5 805007643429572      NCSIE ID: C14QPHE21FR4YWD4

 Expires: 08 November 2014                 Expires w/release of RHEL7      Expires: 08 November 2014

 

On Wed, Feb 20, 2013 at 1:38 PM, Klise, Steve <klises@sutterhealth.org> wrote:

Just a lame question here, but how many and type of spindles are behind the volume you are dumping?  If you only have a handful of drives, could be the culprit.

-----Original Message-----
From: toasters-bounces@teaparty.net [mailto:toasters-bounces@teaparty.net] On Behalf Of Scott Eno
Sent: Wednesday, February 20, 2013 10:36 AM
To: Patrick Giagnocavo
Cc: toasters@teaparty.net
Subject: Re: NDMP speed question

Likely a slight boost, but I am at the mercy of the network guys.  I do what they tell me.


On Feb 20, 2013, at 1:17 PM, Patrick Giagnocavo <xemacs5@gmail.com> wrote:

> Stupid question, but isn't 10Gbe a lot faster with e.g. 9000 byte MTU?  I thought I saw in the original post, a 1500 byte MTU:
>
>
> From original post:
>
> e1a: flags=0x5f4e867<UP,BROADCAST,
> RUNNING,MULTICAST,TCPCKSUM,NOWINS> mtu
> 1500
>
> if the 1500 byte MTU can be changed to 9000 without interrupting service (depends on switch and other configuration, most likely), you might see a speed bump.
>
> Cheers
>
> Patrick
> _______________________________________________
> Toasters mailing list
> Toasters@teaparty.net
> http://www.teaparty.net/mailman/listinfo/toasters


_______________________________________________
Toasters mailing list
Toasters@teaparty.net
http://www.teaparty.net/mailman/listinfo/toasters

_______________________________________________
Toasters mailing list
Toasters@teaparty.net
http://www.teaparty.net/mailman/listinfo/toasters

 

_______________________________________________
Toasters mailing list
Toasters@teaparty.net
http://www.teaparty.net/mailman/listinfo/toasters