Stan,
I've read other's replys and they do seem on the mark. I can say
when we went to SDLT drives from DLT7000's the tape mount time when down
tremendously which helped our server. That said, I used AIT drives years
ago and they have one of the fastest load times on the market if I remember
correctly.
Is it possible that, based on your number of drives, parallelisms, and
target values, that your server is trying to mount too many tapes? That is,
do you see it trying to mount tapes but all your drives are busy?
I think additional CPU's will help with the Network load and mount requests.
Its too bad they don't help with the single threaded nsrd. In the meantime
I would think turning down some of the parallelism and reducing the load on
the server would help?
Robert Maiello
Thomson Healthcare
On Fri, 1 Aug 2003 09:47:55 -0400, Stan Horwitz <stan AT TEMPLE DOT EDU> wrote:
>On Fri, 1 Aug 2003, Tarjei T. Jensen wrote:
>
>>Stan Horwitz wrote:
>>>Thanks Ted. This is very helpful information. Yes, you're right, nsrd is
>>>usually at the top or high up on the process list. We are going to get
>>>three additional CPUs on order for our Enterprise 450 and more RAM. The
>>>CPUS are rated at 450Mhtz. The machine we migrated from is 500Mhtz, if I
>>>remember correctly.
>>
>>Since nsrd is a single process, you may find that it will not help to add
>>CPUs. It may work in the beginning, but as you add clients the problem
>>might return. I would advice you to get hold of a more recent machine with
>>faster CPUs.
>
>Thanks. Are there any suggestions on a more powerful Sun system than the
>E450 for backing approx 120 clients (including four NDMP with SnapImage)?
>
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