Re: btrfs-RAID(3 or 5/6/etc) like btrfs-RAID1?

2014-02-13 Thread Hugo Mills
On Thu, Feb 13, 2014 at 11:32:03AM -0500, Jim Salter wrote: That is FANTASTIC news. Thank you for wielding the LART gently. =) No LART necessary. :) Nobody knows everything, and it's not a particularly heavily-documented or written-about feature at the moment (mostly because it only exists

Re: btrfs-RAID(3 or 5/6/etc) like btrfs-RAID1?

2014-02-13 Thread Goffredo Baroncelli
Hi Jim, On 02/13/2014 05:13 PM, Jim Salter wrote: This might be a stupid question but... There is no stupid questions, only stupid answers... Are there any plans to make parity RAID levels in btrfs similar to the current implementation of btrfs-raid1? It took me a while to realize how

Re: btrfs-RAID(3 or 5/6/etc) like btrfs-RAID1?

2014-02-13 Thread Hugo Mills
On Thu, Feb 13, 2014 at 09:22:07PM +0100, Goffredo Baroncelli wrote: Hi Jim, On 02/13/2014 05:13 PM, Jim Salter wrote: Let's say you have five disks, and you arbitrarily want to define a stripe length of four data blocks plus one parity block per stripe. I what it is different from a

btrfs-RAID(3 or 5/6/etc) like btrfs-RAID1?

2014-02-13 Thread Jim Salter
This might be a stupid question but... Are there any plans to make parity RAID levels in btrfs similar to the current implementation of btrfs-raid1? It took me a while to realize how different and powerful btrfs-raid1 is from traditional raid1. The ability to string together virtually any

Re: btrfs-RAID(3 or 5/6/etc) like btrfs-RAID1?

2014-02-13 Thread Hugo Mills
On Thu, Feb 13, 2014 at 11:13:58AM -0500, Jim Salter wrote: This might be a stupid question but... Are there any plans to make parity RAID levels in btrfs similar to the current implementation of btrfs-raid1? Yes. It took me a while to realize how different and powerful btrfs-raid1 is

Re: btrfs-RAID(3 or 5/6/etc) like btrfs-RAID1?

2014-02-13 Thread Jim Salter
That is FANTASTIC news. Thank you for wielding the LART gently. =) I do a fair amount of public speaking and writing about next-gen filesystems (example: http://arstechnica.com/information-technology/2014/01/bitrot-and-atomic-cows-inside-next-gen-filesystems/) and I will be VERY sure to talk