I do see that all the devices are quite evenly busy. There is no
doubt that the load balancing is quite good. The main question is if
there is any actual striping going on (breaking the data into
smaller chunks), or if the algorithm is simply load balancing.
Striping trades IOPS for
Bob Friesenhahn wrote:
On Sat, 15 Mar 2008, Richard Elling wrote:
My observation, is that each metaslab is, by default, 1 MByte in
size. Each
top-level vdev is allocated by metaslabs. ZFS tries to allocate a
top-level
vdev's metaslab before moving onto another one. So you should see
On Sun, 16 Mar 2008, Richard Elling wrote:
But where is the bottleneck? iostat will show bottlenecks in the
physical disks and channels. vmstat or mpstat will show the
bottlenecks in cpus. To see if the app is the bottleneck will
require some analysis of the app itself. Is it spending its
On Mar 14, 2008, at 3:28 PM, Bill Shannon wrote:
What's the best way to backup a zfs filesystem to tape, where the size
of the filesystem is larger than what can fit on a single tape?
ufsdump handles this quite nicely. Is there a similar backup program
for zfs? Or a general tape management
Jonathan Edwards wrote:
On Mar 14, 2008, at 3:28 PM, Bill Shannon wrote:
What's the best way to backup a zfs filesystem to tape, where the size
of the filesystem is larger than what can fit on a single tape?
ufsdump handles this quite nicely. Is there a similar backup program
for zfs? Or
