Hi Kelly, Thanks for the idea, but that is not a option for the customer. :( If you think about it, theoretical it should go faster with iSCSI then normal IP traffic because you have larger packages sending and less overheads sending back and forward for each package. But this is only because of the large file size. If it was multiple small files such HTML normal IP traffic is faster.
I will probably test both technology to see what speed I get. Best Regards Christian Svensson Cell: +46-70-325 1577 E-mail: christian.svens...@cristie.se Skype: cristie.christian.svensson ________________________________________ Från: ADSM: Dist Stor Manager [ads...@vm.marist.edu] för Kelly Lipp [l...@storserver.com] Skickat: den 27 maj 2009 17:35 Till: ADSM-L@VM.MARIST.EDU Ämne: Re: Performance question I would guess that it won't go any faster via iSCSI. Perhaps it might be slower due to one more protocol conversion on each end. You can move about one quarter TB/hour over a GigE. So that's 1200 hours to move all that data... That's a long time! How about deploying another TSM server local to that data and doing the backup there and removing the tapes for DR? Kelly Lipp CTO STORServer, Inc. 485-B Elkton Drive Colorado Springs, CO 80907 719-266-8777 x7105 www.storserver.com -----Original Message----- From: ADSM: Dist Stor Manager [mailto:ads...@vm.marist.edu] On Behalf Of Christian Svensson Sent: Wednesday, May 27, 2009 5:26 AM To: ADSM-L@VM.MARIST.EDU Subject: [ADSM-L] Performance question Hi all *SMers I got a new challenge in a front of me. Every quarter will I get a large package with 10 000 new files where the total size is 300 TB of Data (each file is average size 30GB large). This is static data that will not replace any other files or modified. The problem is that I can not do any LAN-Free backup over SAN because of the data and TSM is on different locations (20 Miles between the sites). The link between the data and my TSM Server is black fiber but I only have 1 GBit limited speed on this link. Why I don't know... I don't have any time limit how long time it takes to backup/restore this files, even if it takes 1 hour or 30 days. The customer don't care. But as TSM Admin I want to do this backup/restore as fast as possible. I was thinking of to do a LAN-Free backup but via iSCSI so I sending larger blocks between server and tape but I don't know if that will give me any performance benefit then backup as normal incremental backup over normal TCP/IP network. My question is, will it go faster to do a backup via iSCSI then regular LAN Backup? Best Regards Christian Svensson Cell: +46-70-325 1577 E-mail: christian.svens...@cristie.se Skype: cristie.christian.svensson