hi,
i'd like recommendations for a dlt autoloader to be attached to an f760 and controlled by legato. thanks. --
Actually on that subject I am looking to buy a system soon, I'm thinking of getting an HP surestore library and using Veritas. Theres a lot of systems to back up altho they dont have that much data on them, then I have (for now 1) netfiler, does anyone
a) think surestore are good? b) think veritas is good? c) know if i can do anything to save time by directly connecting the tape library to the filer hence bypassing the server but still keeping the tape accessible from the server in order to do my network backups?
Steve
-- Stephen J. Wilcox Internet Manager, Opal Telecom http://www.opaltelecom.co.uk/ Tel: 0161 222 2000 Fax: 0161 222 2008
On Wed, 6 Sep 2000, neil lehrer wrote:
hi,
i'd like recommendations for a dlt autoloader to be attached to an f760 and controlled by legato. thanks. --
neil lehrer wrote:
hi,
i'd like recommendations for a dlt autoloader to be attached to an f760 and controlled by legato. thanks. --
I've never really been a big fan of hanging a tape stacker off the netapps. We had an F330 with a 5 tape DLT stacker on it and would occasionally drop the F330.
We later upgraded to the F740s and hung a similar stacker on it while parrallel testing for production and it would hang the bus. One of the prior SAs here actually found an article somewhere which said that some stackers, locally connected, had tendencies to hang the bus.
We then started heavily using BudTool's ability to dump ndmp requests over the wire. Since we have the 100mbit trunked interfaces, we bearly scratch network throughput. The only bottleneck we see now, is at the drives. We have 12 DLT7000s in a L11000 stacker and the drives just can't write fast enough.
We're still looking for a product that'll dump ndmp requests over the wire efficiently that's also cost effective.
so, the backup data is sent across your network to your tape drives? and the legato indexes are updated by budtools?
Juan Torres wrote:
neil lehrer wrote:
hi,
i'd like recommendations for a dlt autoloader to be attached to an f760 and controlled by legato. thanks. --
I've never really been a big fan of hanging a tape stacker off the netapps. We had an F330 with a 5 tape DLT stacker on it and would occasionally drop the F330.
We later upgraded to the F740s and hung a similar stacker on it while parrallel testing for production and it would hang the bus. One of the prior SAs here actually found an article somewhere which said that some stackers, locally connected, had tendencies to hang the bus.
We then started heavily using BudTool's ability to dump ndmp requests over the wire. Since we have the 100mbit trunked interfaces, we bearly scratch network throughput. The only bottleneck we see now, is at the drives. We have 12 DLT7000s in a L11000 stacker and the drives just can't write fast enough.
We're still looking for a product that'll dump ndmp requests over the wire efficiently that's also cost effective.
--
** Juan Torres ** Susquehanna Partners, GP.
neil lehrer wrote:
so, the backup data is sent across your network to your tape drives?
yes
and the legato indexes are updated by budtools?
yes
The data is sent over-the-wire to the L11000. The L11000 is hung off an E450. The /etc/dumpdates file on the F740s are updated appropriately, and the file history information is kept by BudTool just like all other non-ndmp requests.
-- ******************************************* ** Juan Torres ** Susquehanna Partners, GP. *******************************************
Juan Torres wrote:
neil lehrer wrote:
hi,
i'd like recommendations for a dlt autoloader to be attached to an f760 and controlled by legato. thanks. --
I've never really been a big fan of hanging a tape stacker off the netapps. We had an F330 with a 5 tape DLT stacker on it and would occasionally drop the F330.
We later upgraded to the F740s and hung a similar stacker on it while parrallel testing for production and it would hang the bus. One of the prior SAs here actually found an article somewhere which said that some stackers, locally connected, had tendencies to hang the bus.
We then started heavily using BudTool's ability to dump ndmp requests over the wire. Since we have the 100mbit trunked interfaces, we bearly scratch network throughput. The only bottleneck we see now, is at the drives. We have 12 DLT7000s in a L11000 stacker and the drives just can't write fast enough.
We're still looking for a product that'll dump ndmp requests over the wire efficiently that's also cost effective.
--
** Juan Torres ** Susquehanna Partners, GP.
--
regards
+++++++++++++++++++++++++++++++++++++++++++++++++
- Neil Lehrer
- United States International Broadcasting Bureau
- System Development Division
- voice 202 619-2524
- fax 202 619-3576
- nlehrer@ibb.gov
- " is this crisis an opportunity or just
- another grab the fire extinguisher moment?"
+++++++++++++++++++++++++++++++++++++++++++++++++
As sort of an aside - we're looking at something like this too, and I found that ATL has some network attachable units (with GBE interfaces) that I'm going to be talking with them about tommorrow.
I just wish they were AIT units rather than DLT. Less space wasted.
Still not sure if we'll go that way or with a backup SAN.
Oz
+-- Juan Torres torres@susq.com once said: | neil lehrer wrote: | > | > so, the backup data is sent across your network to your tape drives? | yes | > and the legato indexes are updated by budtools? | yes | | The data is sent over-the-wire to the L11000. | The L11000 is hung off an E450. | The /etc/dumpdates file on the F740s are updated appropriately, | and the file history information is kept by BudTool just like | all other non-ndmp requests.
On Thu, 7 Sep 2000, Juan Torres wrote:
We then started heavily using BudTool's ability to dump ndmp requests over the wire. Since we have the 100mbit trunked interfaces, we bearly scratch network throughput. The only bottleneck we see now, is at the drives. We have 12 DLT7000s in a L11000 stacker and the drives just can't write fast enough.
Out of curiosity, what's the aggregate throughput on your backups to 12 DLT7000's? They should be able to do, what, 5MB/sec if you can stream data to them consistently? 12 drives would be 60MB/sec... are you actually seeing that much throughput over the network?
-
Brian Tao -
Juan Torres -
neil lehrer -
Ozzie Sabina -
Stephen J. Wilcox