Re: [zfs-discuss] ZFS send/recv extreme performance penalty in snv_128

2009-12-13 Thread Bob Friesenhahn
On Sat, 12 Dec 2009, Brent Jones wrote: There is a little bit of disk activity, maybe a MB/sec on average, and about 30 iops. So it seems the hosts are exchanging a lot of data about the snapshot, but not actually replicating any data for a very long time. Note that 'zfs send' is a one-way stre

Re: [zfs-discuss] ZFS send/recv extreme performance penalty in snv_128

2009-12-13 Thread Brent Jones
On Sat, Dec 12, 2009 at 8:14 PM, Brent Jones wrote: > On Sat, Dec 12, 2009 at 11:39 AM, Brent Jones wrote: >> On Sat, Dec 12, 2009 at 7:55 AM, Bob Friesenhahn >> wrote: >>> On Sat, 12 Dec 2009, Brent Jones wrote: >>> I've noticed some extreme performance penalties simply by using snv_128 >>

Re: [zfs-discuss] ZFS send/recv extreme performance penalty in snv_128

2009-12-12 Thread Brent Jones
On Sat, Dec 12, 2009 at 11:39 AM, Brent Jones wrote: > On Sat, Dec 12, 2009 at 7:55 AM, Bob Friesenhahn > wrote: >> On Sat, 12 Dec 2009, Brent Jones wrote: >> >>> I've noticed some extreme performance penalties simply by using snv_128 >> >> Does the 'zpool scrub' rate seem similar to before?  Do

Re: [zfs-discuss] ZFS send/recv extreme performance penalty in snv_128

2009-12-12 Thread Brent Jones
On Sat, Dec 12, 2009 at 7:55 AM, Bob Friesenhahn wrote: > On Sat, 12 Dec 2009, Brent Jones wrote: > >> I've noticed some extreme performance penalties simply by using snv_128 > > Does the 'zpool scrub' rate seem similar to before?  Do you notice any read > performance problems?  What happens if yo

Re: [zfs-discuss] ZFS send/recv extreme performance penalty in snv_128

2009-12-12 Thread Bob Friesenhahn
On Sat, 12 Dec 2009, Brent Jones wrote: I've noticed some extreme performance penalties simply by using snv_128 Does the 'zpool scrub' rate seem similar to before? Do you notice any read performance problems? What happens if you send to /dev/null rather than via ssh? Bob -- Bob Friesenha