Re: Bridging fc to scsi for NetApp filer backups

>
>Yes its per stream. Is that good or can it be tweaked further?
>We use Netbackup NDMP. not sure if increasing the stream would improve
>performance, I think 18995 KB/s is near the rated capacity of an LTO drive,
>(15MB/second native, 30MB/second compressed)?

you're probably near peak performance then, after 15mb/sec it is data
dependent.

>
>>
>> Can you post the firmware version you're using?
>Firmware of FC bridge model: StorageTek SN3250 Router Version: 3.06 2009j

This explains part of it.  We have 2 10k Crossroads and 1 SN3250
(rebadged Xroads).  The 3250 ha been much less problematic, it's the
10k's that are killing me.  I believe it has to do with the load but
still haven't been able to confirm that.

Thanks for the info though, and glad to hear your setup is working
well.

~F

>> Are you chaining any
>> drives off the bus?
>No. R150 has a  FC adaptor connected to one crossroad bridge. which has 2
>LTO SCSI LVD drives attached to it in a L700. Robot controlled by the
>netbackup master server running on solaris.
>
>>Question bombardment I know, but it's nice to
>> hear someone is able to use it and I'd like to be able to duplicate
>> that....
>>
>> Thanks.
>>
>> ~F
>>
>> On Wed, 19 Nov 2003 02:13:50 GMT, "Net Worker" <[EMAIL PROTECTED]>
>> wrote:
>>
>> >We have a filer (R150) that uses fiber to connect to an L700 via a
>crossroad
>> >bridge (1 Gig 1/f).
>> >No problems so far, but we don't have  a fiber switch in between,
>> >just R150-> crossroad.-> tape drives
>> >Performance averages 18995 KB/s
>> >-G
>> >
>> >"Faeandar" <[EMAIL PROTECTED]> wrote in message
>> >news:[EMAIL PROTECTED]
>> >> On Tue, 18 Nov 2003 21:06:09 +0100, "Rene Koehnen-Wiesemes"
>> >> <[EMAIL PROTECTED]> wrote:
>> >>
>> >> >> Performance blows, every weekend when we run fulls something goes
>into
>> >> >> the weeds, and everytime (but once) it's been the bridge.
>> >> >>
>> >> >
>> >> >Please provide us with more details about the problems you have.
>> >> >
>> >> >Rene
>> >> >
>> >>
>> >> Well, they're all over the board but they always start with
>> >> performance dropping to it's knees.  The bridge has very little in the
>> >> way of online diags so inevitably the solution is reboot the bridge.
>> >> Everything from buffer overflows to mis-presenting scsi id's.
>> >>
>> >> I'm looking more for information from people who already have this
>> >> sort of setup and what they think of it.  Not necessarily a bridge but
>> >> filers using fiber to backup.
>> >> Ideally I'd go stright to fiber drives but SDLT has no native fiber
>> >> yet.
>> >>
>> >> ~F
>> >
>>
>