Here is some Pie in the Sky info for ya... "btrfs" or "Butter FS" is being developed by Oracle for Linux.
Its one of the reasons Oracle shutdown the development of ZFS when they bought Sun. (ZFS has many of those snapshotting features you are talking about). So now you have all of these spinoffs for ZFS with companies like: http://nexenta.com/corp/ http://www.ixsystems.com/ix/storage/titan-truenas-pro Nexenta is based on a Solaris kernel (with Debian's package management) TrueNAS is based on a BSD kernel with ZFS implemented there. ZFS never made it into the Linux kernel because of licensing issues... although there is still some attempt to do it. Apple at one point was talking about it, but, they shut the project down. So, btrfs, is the attempt to get those features you guys are talking about into the Linux kernel, and because its oracle, they will eventually do it, I'm sure (there is enough money behind it) However, as all filesystem development goes, they have been working on btrfs for some years now... and at present, it does not have a filesystem checker (fsck) that can fix errors. So its not recommend for production use. Unless of course they have just released it. I played with btrfs in its infancy a couple of years ago... at a time when you could not even boot from it. It was very finnicky, as anything new is sometimes. I use Nexenta free version for a couple of video cameras I got saddled into providing storage for. It was cheap enough to setup a spare machine I had with it. As far as using either for U2, "Much testing and documenting would be required me thinks" On Tue, Aug 23, 2011 at 10:30 AM, Robert Porter <ropor...@ochsner.org>wrote: > > Snapshotting doesn't get rid of mirroring just the need to break/merge > them. I'd still suggest using mirrors. The risk of disk failure is too > great. Guess you could use some other level of RAID to get there but it's > hard to beat spindles plus mirrors (0+1) for databases. In fact our > snapshot logical volumes are striped and mirrored as well. The snapshot > volume is holding the writes, you have the same risk of a disk failure > there. > > On the Linux front, are you talking about Btrfs (aka "Better FS")? I've > read some good things, but haven't gotten the nerve to play with it yet. > > > >>> Wols Lists <antli...@youngman.org.uk> 8/23/2011 6:28 AM >>> > On 22/08/11 14:56, Robert Porter wrote: > ... > > Interesting. The reason I suggested breaking the mirror was that > mirroring is a common technique. > ... > _______________________________________________ > U2-Users mailing list > U2-Users@listserver.u2ug.org > http://listserver.u2ug.org/mailman/listinfo/u2-users > _______________________________________________ > U2-Users mailing list > U2-Users@listserver.u2ug.org > http://listserver.u2ug.org/mailman/listinfo/u2-users > -- John Thompson _______________________________________________ U2-Users mailing list U2-Users@listserver.u2ug.org http://listserver.u2ug.org/mailman/listinfo/u2-users
