We have some lit fiber between two of our locations as well. The WAN guy came to us on his own, and asked if we'd like to use some of the DWDM capacity on the fiber to run our SAN across between facilities.
Since we already had FC-IP capable switches, the only incremental cost would be about 5k$ for the DWDM ports. The point I'm trying to make: Talk to your WAN folks, and ask them what is possible. There might be more bandwidth available for the cost of the ports. -----Original Message----- From: ADSM: Dist Stor Manager [mailto:ads...@vm.marist.edu] On Behalf Of Christian Svensson Sent: Wednesday, May 27, 2009 4:26 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 DISCLAIMER: This message is intended for the sole use of the addressee, and may contain information that is privileged, confidential and exempt from disclosure under applicable law. If you are not the addressee you are hereby notified that you may not use, copy, disclose, or distribute to anyone the message or any information contained in the message. If you have received this message in error, please immediately advise the sender by reply email and delete this message.