Pavan Reddy wrote:
This is the time it took to move the file:
The machine is a Intel P4 - 512MB RAM.
bash-3.00# time mv ../share/pav.tar .
real 1m26.334s
user 0m0.003s
sys 0m7.397s
bash-3.00# ls -l pav.tar
-rw-r--r-- 1 root root 516628480 Oct 29 19:30 pav.tar
A similar move on my Mac OS X took this much time:
pavan-mettus-computer:~/public pavan$ time mv pav.tar.gz ./Burn\ Folder.fpbf/
real 0m0.006s
user 0m0.001s
sys 0m0.004s
pavan-mettus-computer:~/public/Burn Folder.fpbf pavan$ ls -l pav.tar.gz
-rw-r--r-- 1 pavan pavan 347758518 Oct 29 19:09 pav.tar.gz
NOTE: The file size here is 347 MB where as the previous one was 516MB. But still the time taken is huge when compared.
Its an X86 machine running Nevada build 51. More info about the disk and pool:
bash-3.00# zpool list
NAME SIZE USED AVAIL CAP HEALTH ALTROOT
mypool 29.2G 789M 28.5G 2% ONLINE -
bash-3.00# zfs list
NAME USED AVAIL REFER MOUNTPOINT
mypool 789M 28.0G 24.5K /mypool
mypool/nas 789M 28.0G 78.8M /export/home
mypool/nas/pavan 710M 28.0G 710M /export/home/pavan
mypool/nas/rajeev 24.5K 28.0G 24.5K /export/home/rajeev
mypool/nas/share 24.5K 28.0G 24.5K /export/home/share
It took lots of time when I moved the file from /export/home/pavan/ to
/export/home/share directory.
You're moving that file from one filesystem to another, so it will have
to copy all the data of the file in addition to just a few metadata
blocks. If you mv it within the same filesystem it will be quick (as in
your OSX example).
eric
I was not doing any other operation other than the move command.
There are no files in that directories other than this one.
It has a 512MB Physical memory. The Mac machine has 1Gig RAM.
No snapshots are taken.
iostat and vmstat info:
bash-3.00# iostat -x
extended device statistics
device r/s w/s kr/s kw/s wait actv svc_t %w %b
cmdk0 3.1 3.0 237.9 132.8 0.6 0.1 112.6 2 3
fd0 0.0 0.0 0.0 0.0 0.0 0.0 3152.2 0 0
sd0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
sd1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0 0
bash-3.00# vmstat
kthr memory page disk faults cpu
r b w swap free re mf pi po fr de sr cd f0 s0 s1 in sy cs us sy id
0 0 0 2083196 111668 5 25 13 3 13 0 44 6 0 -1 -0 296 276 231 1 2 97
-Pavan
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