Re: [Networker] SLOW LTO-drives

Hi Tonny,

What's the nature of the files on the volume?  If it's tons of small files,
that'll kill the backup performance.

How full are your volumes?  The filer starts to fragment the volume when the
volume reaches ~90% capacity.

Large numbers of snapshots can also affect (at least it used to back in the
early days of OnTap 6.x - don't know if still happens).  For example, this
happens if you have hourly, nightly, and weekly snapshots enabled on the
volume.

Regards,
        /\/elson

On Fri, 13 Sep 2002, Tonny Verberk wrote:

> To all,
>
> We are running networker 6.1.1 with NDMP and are backing up a NetApp filer
> (F840 with ONTAP 6.2R2) to two LTO-drives which are attached to the filer.
>
> Backups are going oke but the speed of the LTO-drives is very poor. We only
> get an averedge of 12 MB/sec (compressed to nrst?a) which should be about
> 25MB/sec.
>
> Has anybody seen this poor performance and if so, have you solved it?
> Do you have any tips to speed up the backup?
>
> TIA.
>
> Regards,
>
> Tonny Verberk.
> NCR
> Tel Nr : (+31 40 27)32071
> E-mail : Tonny.Verberk AT ncr DOT com
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