Networker

Re: [Networker] NDMP slow down after teaming NIC's on the Networker Backup Server

2007-04-18 06:58:09
Subject: Re: [Networker] NDMP slow down after teaming NIC's on the Networker Backup Server
From: Howard Martin <howard.martin AT EDS DOT COM>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Wed, 18 Apr 2007 06:56:26 -0400
On Mon, 16 Apr 2007 16:01:58 -0400, Jeff Wade <jefwad AT SAFECO DOT COM> wrote:

>We recently teamed two Network Cards on our Windows 2000 Networker 7.3.2
>master server that performs IP based NDMP backups of the Celerra NAS
>filesystems.  We have always scored relatively fast speeds prior to doing
>this.
>Almost immediately we experienced very slow NDMP backups.  On our GigE
>network the teamed NIC’s perform at around 450MB/s which seems pretty darn
>good.  We have LTO-3’s in the tape library.  I have the network team
>looking at NAS IP port utilization, but outside of that we are not sure
>where the bottleneck lies.
>
>Thoughts?
>
>Jeff
>
1GB ethernet - highest theoretical throughput 125MB/s (doesn't account for 
packet headers ack's etc., if you see 450MB/s how many interfaces are you 
teaming? If its 2 then that figure is impossible.

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