Re: How many drives are you using when you are running TDP for R/ 3 and backing up SAP Database? Urgent!

2003-08-15 Thread Juan Jose Reale
Hello! Yes, I am using LAN-Free backups via SAN, but I have one HBA (Fiber Channel Adapter - 100 MB/sec) for accessing drives and other 4 FCAs for accessing disks (SHARK). We have two switches (directors) ED-500 and 2 switches MC-Data ES-1000. I think we have

Re: How many drives are you using when you are running TDP for R/ 3 and backing up SAP Database? Urgent!

2003-08-15 Thread Hooft, Jeroen
Hola That should do the trick, I think. If the line to the drives is not the bottleneck anymore, the system and/or drives will become. The performance of LTO-drives differs a lot in my LTO-environment. Goes from 8MB/s upto 30MB/s, but I think that's the result of a poorly setup of the SAN and

Re: How many drives are you using when you are running TDP for R/ 3 and backing up SAP Database? Urgent!

2003-08-15 Thread Richard Sims
The performance of LTO-drives differs a lot in my LTO-environment. Goes from 8MB/s upto 30MB/s, but I think that's the result of a poorly setup of the SAN and the fact that I have windows-clients. ... As posted in the past, see IBM LTO Ultrium Performance Considerations

How many drives are you using when you are running TDP for R/3 and backing up SAP Database? Urgent!

2003-08-14 Thread Juan Jose Reale
Hi everybody! We are going to purchase a LTO Ultrium Ultrascalable tape library 3584 model L32, but I don't know yet how many drives we need for running TDP for R/3 (Oracle) on IBM 6M1 RS/600 in under 4 hours. There are 8 CPU's (750 Mhz) with memoria real = 10 GB. The

Re: How many drives are you using when you are running TDP for R/ 3 and backing up SAP Database? Urgent!

2003-08-14 Thread Hooft, Jeroen
Hi Assuming it are LANFree backups, via how many HBA's are you accessing your drives (and disks)? I think the HBA and or the SAN-switch will be the bottleneck (if you have 1Gbit/sec adapters/ports). Let's say you will reach 80 MB/s via 1 HBA, that's 288.000 MB/h 170/288000 = 6 hours if you