Hi, I've read a few articles about the lack of 'simple' raidz pool expansion capability in ZFS. I am interested in having a go at developing this functionality. Is anyone working on this at the moment?
I'll explain what I am proposing. As mentioned in many forums, the concept is really simple: allow a raidz pool to grow by adding one or more disks to an existing pool. My intended user group is the consumer market, as opposed to the enterprise, so I expect I'll put some rather strict limitations on how/when this functionality will operate: to make the first implementation more achievable. The use case I will try and solve first is, what I see as, the simplest. I have a raidz pool configured with 1 file system on top; no snapshots. I want to add an additional disk (must be at least the same size as the rest of the disks in the pool). I don't mind if there is some downtime. I want all my data to take advantage of the additional disk. What is the benefit to the consumer? The answer is simple: - more flexibility in growing storage i.e. can have an odd number of disks. - more disk space available for use e.g. 2 pools of 3 disks gives less available space than 1 pool of 6 disks. - consistent with many RAID-5 implementations - opens up the consumer market for raidz: growable small backup/SAN/Home Theatre appliances I'm no expert on any of this stuff, but I do have many years experience as a software engineer. Is there a mentoring program that Sun offers so I can get some assistance when necessary? My expectation is that this isn't impossible to do but it isn't simple to do either. Are there any procedural hoops I need to jump through to take on this piece of work? Regards, Ty -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
