Re: [Networker] NDMP over network speed question

So your doing NDMP over the network to drives attached to the backup
server, they're not attached to the NetApp ?

If so, I would think your top speeds may be limited your servers NIC(s).

Robert Maiello
Pioneer Data Systems


On Tue, 18 Jul 2006 08:46:20 +0100, bob flynn <bob.flynn AT S3GROUP DOT COM> 
wrote:

>Hi,
>
>I have the following configuration
>
>    * Networker Server 7.2.2
>    * SCSI attached LTO2 drives
>    * Linux RH 3 AS
>
>Netapp filers running NDMP over network, streaming data to backup server.
>
>My question is to clarify my understanding of expected speeds of NDMP
>backups.
>
>What I think happens is;
>
>    * Networker server requests an ndmp backup from filer.
>    * Filer commences ndmp backup.
>    * ndmp backup runs through the ndmp phases. Once a tree walk of the
>      data is complete, and the file indexes have been created, it
>      starts streaming data to the backup server.
>
>My question is;
>
>I expect the job to work as follows;
>
>    * First phases, no data streamed
>    * Once index is created, stream this data across
>    * Once data is being streamed, a solid stream of data from the filer
>      to backup server.
>
>What I see is;
>
>    * First phases, no data streamed
>    * Once index is created, a trickle of data
>    * Once data is being streamed, data seems to spurt, ie fast/slow/fast.
>
>What characteristics of ndmp data streaming should I see. Can I run any
>tests to verify expected v's actual data rates, to determine if I am
>bottlenecking backups at;
>
>    * Filer ( CPU )
>    * Filer ( Network )
>    * Network
>    * Backup Server ( CPU )
>    * Backup Server ( network )
>    * Backup Server ( tapedrive )
>
>I am currently monitoring the following;
>
>    * Filer ( CPU )
>    * Filer ( NIC )
>    * Network
>    * Backup Server ( CPU )
>    * Backup Server ( NIC )
>
>and am not seeing bottlenecks, but still seeing erratic backup performance.
>
>Any hints to either understand this further, and baseline performance
>are appreciated.
>
>-Bob
>
>
>
>
>
>
>
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