So far snapshots are ok - they're reminiscent of Netapp, but as you mentioned, they're in the root directory of the mount only. Hasn't been an issue for us, but I guess if we were trying to automate things it'd be another step to figure out the path to the snapshot.
There is a quirk in their reporting of space and snapshot reserve space and things like that - if you use the snapshot reserve, it reserves dedicated space for snapshots, but doesn't mark that space as used in your free space. I made the mistake of setting the snapshot reserve too high and we had a bit of panic when we lost the ability to write to the device with a "quota exceeded" error when we had no quotas. Fortunately, now that we know how it works (including the fact that you can write snapshots even when the reserve is exceeded, that's just a minimum guarantee but they can grow as large as you want them to) we've had no issues there. We're not doing any NDMP backups or replication yet - or at least not on the array. We do application-level replication (i.e. write a backup copy of this file to this other place, like S3 for instance) but nothing in the array. It's one of the things we'd like to get to once the budget allows. The most critical files are "backed up" to S3 (and then back down to different disk in case S3 goes south, not that AWS has ever had outages) and the rest we rely on the Isilon's built-in protection. Nicholas On Sat, Jun 18, 2011 at 5:27 PM, Adam Levin <[email protected]> wrote: > > On Fri, 17 Jun 2011, Nicholas Tang wrote: > >> We just put an Isilon cluster in to production a couple of months ago and >> so >> far, I've never had a storage system that came as close to ' just >> working'. >> Two thumbs up so far. It's fast and easy to manage and so far has >> exceeded >> its specs. We've tried adding and removing shelves and drives while it >> was >> under some reasonably heavy benchmarking loads and, well, out just worked. >> Very impressed so far. We have a 6 node cluster with around 350 tb of >> data >> on it, doing around 15-25k iops. >> > > That's great to know. I've been pretty impressed with what I've heard > about Isilon, and they've been around for a while. > > Have you played around at all with snapshots? How are they working for > you? > > Are you doing NDMP backups or any replication? > > -Adam > >
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