Re: [zfs-discuss] Zvol vs zfs send/zfs receive

2012-09-16 Thread Edward Ned Harvey (opensolarisisdeadlongliveopensolaris)
> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Bill Sommerfeld > > > But simply creating the snapshot on the sending side should be no > problem. > > By default, zvols have reservations equal to their size (so that writes > don't fail due

Re: [zfs-discuss] Zvol vs zfs send/zfs receive

2012-09-16 Thread Fajar A. Nugraha
On Sun, Sep 16, 2012 at 7:43 PM, Edward Ned Harvey (opensolarisisdeadlongliveopensolaris) wrote: > There's another lesson to be learned here. > > As mentioned by Matthew, you can tweak your reservation (or refreservation) > on the zvol, but you do so at your own risk, possibly putting yourself in

Re: [zfs-discuss] Zvol vs zfs send/zfs receive

2012-09-16 Thread Richard Elling
On Sep 15, 2012, at 6:03 PM, Bob Friesenhahn wrote: > On Sat, 15 Sep 2012, Dave Pooser wrote: > >> The problem: so far the send/recv appears to have copied 6.25TB of >> 5.34TB. >> That... doesn't look right. (Comparing zfs list -t snapshot and looking at >> the 5.34 ref for the snapshot v

Re: [zfs-discuss] Zvol vs zfs send/zfs receive

2012-09-16 Thread Dave Pooser
On 9/16/12 10:40 AM, "Richard Elling" wrote: >With a zvol of 8K blocksize, 4K sector disks, and raidz you will get 12K >(data >plus parity) written for every block, regardless of how many disks are in >the set. >There will also be some metadata overhead, but I don't know of a metadata >sizing for