>I have a LTO-3 Tape library that can be fiber attached to the Net App filer. >My concern is that the Net App filer will not be able to stream to the tape >drives and I will kill my performance since the tape will have to do lots >of re-positioning and start and stop.
It does heart my good to see somebody thinking about these things. I believe you are probably right. >I was thinking a VTL would be able to match the speed of the net app box >thus the performance would be optimized. That would be correct, sir! >I have newer and older Net App boxes, assuming a 2GB san, what performance >can I expect using NDMP? YMMV. It's a dump thing. >Do you see an advantage using VTL in place of multiple LTO-3 drives? Oh, yeah. NDMP is one of the best uses of VTL. Give each filer as many tape drives as it wants and you don't have to share. Awesome. >How many streams are possible (Using NBU 6.x)? Do the number of streams >help in a VTL environment? how about a tape environment? 1 per drive. That's also an NDMP thing. >Any recommendations on performance tuning with NBU 6 and NDMP? Other than filer filesystem and volume constructioin (and more RAM/CPU), there's not much to do. There's NOTHING to do on the NetBackup side. It's all about the filer, the data, and dump. _______________________________________________ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu