Thanks for the answers, everyone. For what it's worth, the question wasn't so much to guide our own path; we're heavily invested in our SAN infrastructure and our VTL cards already. It was more an attempt to validate or refute what we were recently told by outside consultants. I was also looking for the current state of the art, not the history of this issue.
Nick On Nov 15, 2011, at 1:20 PM, Huebner,Andy,FORT WORTH,IT wrote: > 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:[email protected]] On Behalf Of Nick > Laflamme > Sent: Tuesday, November 15, 2011 6:45 AM > To: [email protected] > 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
