Peter's mail about fsstat kstats inspired me to write up some thoughts
I have about fsstat. I've been playing with it over the weekend and
some more today.
1. Thank God (or thank Rich) that we finally have something in this
space. It's a vast vast improvement.
2. I'd like to see many more ways to slice the data:
fsstat -A Show all mount points for all FS's
fsstat -z Skip zero'd entries (like iostat -xz)
fsstat -a -F <fs> Show all mount points for this FS type
fsstat -a -l Show only local filesystems (no NFS, etc).
fsstat -a -s Show only non-synthetic filesystems
(no lofs, mntfs, autofs)
fsstat -Z Aggregate each zone's FS activity
fsstat -z Watch a particular zone
(of course I'm proposing two -z's... we'll
need to work that out :p)
3. I find the output on the challeging side to visually grok:
$ fsstat 1
new name name attr attr lookup rddir read read write write
file remov chng get set ops ops ops bytes ops bytes
2.15K 345 137 186K 806 799K 2.86K 188K 229M 7.24K 7.07M ufs
0 0 0 2.58K 0 4.52K 1.02K 26.6K 18.5M 46.0K 380K proc
0 0 0 0 0 0 0 0 0 0 0 nfs
0 0 0 0 0 0 0 0 0 0 0 zfs
153 0 0 67.2K 217 108K 605 25.7K 6.07M 24.5K 790K lofs
12.8K 11.8K 696 83.3K 167 17.1K 0 166K 166M 177K 154M tmpfs
0 0 0 280 0 0 0 197 32.5K 0 0 mntfs
0 0 0 51 0 54 65 0 0 0 0 nfs3
12 4 0 2.48K 0 3.42K 151 1.82K 299K 8.79K 118K nfs4
0 0 0 363 0 318 0 0 0 0 0 autofs
0 0 0 1 0 0 0 0 0 0 0 ufs
0 0 0 0 0 0 0 0 0 0 0 proc
0 0 0 0 0 0 0 0 0 0 0 nfs
0 0 0 0 0 0 0 0 0 0 0 zfs
0 0 0 0 0 0 0 0 0 0 0 lofs
0 0 0 0 0 0 0 0 0 0 0 tmpfs
0 0 0 0 0 0 0 0 0 0 0 mntfs
0 0 0 0 0 0 0 0 0 0 0 nfs3
0 0 0 0 0 0 0 0 0 0 0 nfs4
0 0 0 0 0 0 0 0 0 0 0 autofs
0 0 0 0 0 0 0 0 0 0 0 ufs
0 0 0 0 0 0 0 0 0 0 0 proc
0 0 0 0 0 0 0 0 0 0 0 nfs
0 0 0 0 0 0 0 0 0 0 0 zfs
0 0 0 0 0 0 0 0 0 0 0 lofs
0 0 0 0 0 0 0 0 0 0 0 tmpfs
0 0 0 0 0 0 0 0 0 0 0 mntfs
Where does one second end and the next begin? Some spacing or repeating
the titles or something would help a lot. mpstat and friends all do that;
this code seems to do it on every third iteration, which I think isn't
that useful.
4. I'm not sure that the default output is the one which most admins
would want at a glance. Just my $0.0002.
I *think* I want the 'fsstat -a -s' output I propose above.
Correlated with this is the problem that the rightmost column is too
narrow; I'd consider sacrificing one or merging two columns to get
some more room on the right for the mount point. Put it together,
I'd like something like this:
new name attr lookup rddir read read write write
file ops ops ops ops ops bytes ops bytes
2.15K 582 188K 801K 2.90K 189K 230M 7.25K 7.07M /
30 37 124 129 0 15 436 16 852 /tmp
53 12 471 806 0 176 43.7K 13 2.56K /var/run
0 0 0 0 0 0 0 0 0 /mypool
6 0 232 150 96 1.71K 168K 5.86K 78.8K /home/dp
0 0 3 4 0 0 0 0 0 /home/kg
0 0 4 3 2 0 0 0 0 /opt/SUNWspro.40
2.95K 2.37K 14 3.88K 0 33.4K 33.4M 35.8K 30.9M /etc/svc/volatile
Thanks again for a very useful tool.
-dp
--
Daniel Price - Solaris Kernel Engineering - dp at eng.sun.com - blogs.sun.com/dp
