On Wed, Mar 2, 2016 at 12:37 AM, Erik Sørnes <[email protected]> wrote:
> Hi! > > Are there any plans on implementing functionality to remove an entire vdev > from a pool ? > > One could write zpool remove <zpoolname> vdev <vdev-name>, and it would > move the data on <vdev-name> to other vdevs in the pool and then remove the > vdev <vdev-name> entirely. > This is very usefull for many use cases. I've googled a lot, and haven't > found any information on this, apart from a very old one from SUN. > Yes, we (Delphix) have implemented this and it is used in production. It is not yet upstreamed. For more info, see our talk at the 2014 OpenZFS Developer Summit: slides: http://open-zfs.org/w/images/b/b4/Device_Removal-Alex_Reece_%26_Matt_Ahrens.pdf video: http://www.youtube.com/watch?v=Xs6MsJ9kKKE&list=PLaUVvul17xSdOhJ-wDugoCAIPJZHloVoq&index=12 Here is the first commit for Device Removal from the Delphix repo (there are several follow on bug fixes and additional features): https://github.com/delphix/delphix-os/commit/db775effdda128d8e14216abde06281513b03c37 We haven't yet upstreamed this because it only supports removing non-redundant top-level vdevs (i.e. you can't remove a mirror or RAID-Z vdev). Additional work is needed to make sure that we don't lose any good copies of the data, and to ensure proper raid-z allocation alignment. We would welcome anyone who's interested in implementing these. We'd also appreciate opinions of "Please upstream even without mirror/RAID-Z support" or "Please don't integrate without mirror/RAID-Z support - all ZFS features should work together." --matt > > kind regards > > Erik Sørnes, IT-support, Nilu > P Please consider the environment before printing this email and > attachments > ------------------------------------------- openzfs-developer Archives: https://www.listbox.com/member/archive/274414/=now RSS Feed: https://www.listbox.com/member/archive/rss/274414/28015062-cce53afa Modify Your Subscription: https://www.listbox.com/member/?member_id=28015062&id_secret=28015062-f966d51c Powered by Listbox: http://www.listbox.com
