In my previous entry, I described the overall architecture of shadow migration. This post will dive into the details of how it's actually implemented, and the motivation behind some of the original design decisions. VFS interposition A very early desire was that we wanted something that could migrat ...
When ZFS was first developed, the engineering team had the notion that pooled storage would make filesystems cheap and plentiful, and we'd move away from the days of /export1, /export2, ad infinitum. From the ZFS perspective, they are cheap. It's very easy to create dozens or hundreds of filesystems ...
Today we shipped our 2009.Q3 release. Amidst the many great new features, enhancements and bug fixes, we've added new storage profiles for triple-parity RAID and three-way mirroring. Here's an example on a 9 JBOD system of what you'll see in the updated storage configuration screen: Note that the ne ...
In the Sun Storage 7000 2009.Q3 software release, one of the major new features I worked on was the addition of what we termed "shadow migration." When we launched the product, there was no integrated way to migrate data from existing systems to the new systems. This resulted in customers rolling it ...
Double-parity RAID, or RAID-6, is the de facto industry standard for storage; when I started talking about triple-parity RAID for ZFS earlier this year, the need wasn't always immediately obvious. Double-parity RAID, of course, provides protection from up to two failures (data corruption or the whol ...
Last week, we announced the Sun Storage 7310 system. At the same time, a less significant but still notable change was made to the Sun Storage product line. The Sun Storage 7210 system is now expandable via J4500 JBODs. These JBODs have the same form factor as the 7210 - 48 drives in a top loading 4 ...
Last week, we announced the Sun Storage 7310 system. At the same time, a less significant but still notable change was made to the Sun Storage product line. The Sun Storage 7310 system is now expandable via J4500 JBODs. These JBODs have the same form factor as the 7210 - 48 drives in top loading 4u ...
On the heels of the 2009.Q2.0.0 release, we've posted an update to the Sun Storage 7000 simulator. The simulator contains the exact same software as the other members of the 7000 series, but runs inside a VM rather than on actual hardware. It supports all the same features, and has all the same UI c ...
Today we released the first major software update for the Sun Storage 7000 series. It includes a bunch of new features, bug fixes, and improvements. Significantly for users of the Sun Storage 7000 simulator, the virtual machine version of the 7000 series, this is the first update that supports the V ...
