We run two DDs with VTL and 4 TSM servers. I have had no real problems with the setup. The VTL cost was not an issue due to the AS/400 requiring it. We do push data to the systems faster than 10GbE, also our Ethernet network is not built to handle the data load from where the TSM servers are to where the DDs are located. About 1 mile. With that said we are currently building a new TSM server that will use CIFS. In this case the network was built with DD in mind. Happiness may come from what is comfortable for you to manage. For us it was easier to transition to a VTL than to NFS. It took about an hour to point TSM to new tape pools. (4 months to move the data) DDs do have a stream limit, so we always build a disk pool in front to handle the hundreds of incoming streams and to handle incoming data when the DD is down for maintenance.
Andy Huebner -----Original Message----- From: ADSM: Dist Stor Manager [mailto:ADSM-L@VM.MARIST.EDU] On Behalf Of Nick Laflamme Sent: Tuesday, November 15, 2011 6:45 AM To: ADSM-L@VM.MARIST.EDU Subject: [ADSM-L] Tape or NFS? (DataDomain specifically) We've been told by consultants (these particular consultants shouldn't throw stones) that DataDomain customers running TSM are far happier running NFS than VTL, because DDRs are built primarily as file servers and the VTL function is an add-on. I can see the financial motive for staying with NFS (those VTL licenses aren't cheap!), but I'm skeptical about the implication that there's a functional or performance advantage to using NFS over VTL for a TSM server, in our case on AIX. Would anyone who's run both or chosen NFS care to comment? How much does it depend on your infrastructure or your needs for LAN-free? Thanks, Nick This e-mail (including any attachments) is confidential and may be legally privileged. If you are not an intended recipient or an authorized representative of an intended recipient, you are prohibited from using, copying or distributing the information in this e-mail or its attachments. If you have received this e-mail in error, please notify the sender immediately by return e-mail and delete all copies of this message and any attachments. Thank you.
