Re: [zfs-discuss] zfs send/recv question

2008-03-07 Thread Randy Bias
ave seen zero negative performance impact. In fact, I am unable to really make my ZFS fileservers notice they are in use CPU-wise. The added benefit is that zfs send/recv is already compressed, removing the need for a costly intermediate single-threaded compressor of any kind. --Randy Ra

Re: [zfs-discuss] jbod questions

2006-09-30 Thread Randy Bias
On Sep 30, 2006, at 1:07 PM, Torrey McMahon wrote:What about the case of an iSCSI LUN?  Does this change?  I get that while local to the system a read from a mirror versus a RAIDZ pool is desirable, but would an IP network introduce enough latency that the difference is negligible?  And wouldn't I

Re: [zfs-discuss] jbod questions

2006-09-29 Thread Randy Bias
On Sep 29, 2006, at 6:24 AM, Roch wrote: Keith Clay writes: On Sep 29, 2006, at 2:41 AM, Roch wrote: IMO, RAIDZn should perform admirably on the write loads. The random reads aspects is more limited. The simple rule of thumb is to consider that a RAIDZ group will deliver random read IOPS with