I just got off the phone with the folks at Symantec where we talked about NBU 6.5.4. The thing that stood out for me were the enhancements for OST, so I thought I’d talk about those.
I’ve already blogged about OST and why I think it’s so cool. It signficantly increases the value of an intelligent storage device, like the one that EMC just paid way too much money to acquire. 😉
One of the things I’ve always wanted to do was to have backups replicated from my datacenter to an alternate location, and then to make a tape copy of it from there. Those tapes would never leave the tape library, but would be the “just in case” copy. OST makes it possible to get the copy there, and for NBU to know about it, but until 6.5.4, you could not make that tape copy at the remote site without some scripting because NBU always wants to duplicate/clone from the primary copy, and there can be only one primary copy. Before 6.5.4, you had to write a script that would temporarily promote the remote copy to be the primary while you were copying it to tape. It worked, but it was clunky.
NBU 6.5.4 introduced the concept of “hierarchical duplication,” which allows a storage lifecycle policy to choose which copy it wants to make a copy from. This will allow my desired design to work without having to script anything. Nice job.
In addition, 6.5.4 also supports the concept of doing copies direct from the intelligent storage device to tape without having to transfer those bits back to the media server. While this is in the product today, none of the OEMs have supported it yet. I wrote about this in my open letter to EMC employees.I’m also a big fan of this, but I’ll have to wait a while for the vendors to support it.
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Written by W. Curtis Preston (@wcpreston). For those of you unfamiliar with my work, I've specialized in backup & recovery since 1993. I've written the O'Reilly books on backup and have worked with a number of native and commercial tools. I am now Chief Technologist at Druva, the leading provider of cloud-based data protection and data management tools for endpoints, infrastructure, and cloud applications. These posts reflect my own opinion and are not necessarily the opinion of my employer.