[zfs-discuss] Improving snapshot write performance

2012-04-11 Thread Ian Collins
I use an application with a fairly large receive data buffer (256MB) to replicate data between sites. I have noticed the buffer becoming completely full when receiving snapshots for some filesystems, even over a slow (~2MB/sec) WAN connection. I assume this is due to the changes being widely

Re: [zfs-discuss] Improving snapshot write performance

2012-04-11 Thread Richard Elling
On Apr 11, 2012, at 1:34 AM, Ian Collins wrote: I use an application with a fairly large receive data buffer (256MB) to replicate data between sites. I have noticed the buffer becoming completely full when receiving snapshots for some filesystems, even over a slow (~2MB/sec) WAN

Re: [zfs-discuss] Improving snapshot write performance

2012-04-11 Thread Ian Collins
On 04/12/12 04:17 AM, Richard Elling wrote: On Apr 11, 2012, at 1:34 AM, Ian Collins wrote: I use an application with a fairly large receive data buffer (256MB) to replicate data between sites. I have noticed the buffer becoming completely full when receiving snapshots for some filesystems,

Re: [zfs-discuss] Improving snapshot write performance

2012-04-11 Thread Peter Jeremy
On 2012-Apr-11 18:34:42 +1000, Ian Collins i...@ianshome.com wrote: I use an application with a fairly large receive data buffer (256MB) to replicate data between sites. I have noticed the buffer becoming completely full when receiving snapshots for some filesystems, even over a slow (~2MB/sec)

Re: [zfs-discuss] Improving snapshot write performance

2012-04-11 Thread Ian Collins
On 04/12/12 09:00 AM, Jim Klimov wrote: 2012-04-11 23:55, Ian Collins wrote: Odd. The pool is a single iSCSI volume exported from a 7320 and there is 18TB free. Lame question: is that 18Tb free on the pool inside the iSCSI volume, or on the backing pool on 7320? I mean that as far as the

Re: [zfs-discuss] Improving snapshot write performance

2012-04-11 Thread Ian Collins
On 04/12/12 09:51 AM, Peter Jeremy wrote: On 2012-Apr-11 18:34:42 +1000, Ian Collinsi...@ianshome.com wrote: I use an application with a fairly large receive data buffer (256MB) to replicate data between sites. I have noticed the buffer becoming completely full when receiving snapshots for