On Mon, Apr 25, 2011 at 11:58 PM, Richard Elling <richard.ell...@nexenta.com> wrote: > Hi ZFSers, > I've been working on merging the Joyent arcstat enhancements with some of my > own > and am now to the point where it is time to broaden the requirements > gathering. The result > is to be merged into the illumos tree. > > arcstat is a perl script to show the value of ARC kstats as they change over > time. This is > similar to the ideas behind mpstat, iostat, vmstat, and friends. > > The current usage is: > > Usage: arcstat [-hvx] [-f fields] [-o file] [interval [count]] > > Field definitions are as follows:
[Lots of 'em.] > Some questions for the community: > 1. Should there be flag compatibility with vmstat, iostat, mpstat, and > friends? Beyond interval and count, I'm not sure there's much in the way of commonality. Perhaps copy -T for timestamping. > 2. What is missing? > > 3. Is it ok if the man page explains the meanings of each field, even though > it > might be many pages long? Definitely. Unless the meaning of each field is documented elsewhere. > 4. Is there a common subset of columns that are regularly used that would > justify > a shortcut option? Or do we even need shortcuts? (eg -x) If I was a user of such a tool, I wouldn't know where to start. Which fields ought I to be looking at? There are a whole bunch of them. What I would expect is a handful of standard reports (maybe one showing the sizes, one showing the ARC efficiency, another one for L2ARC). > 5. Who wants to help with this little project? I'm definitely interested in emulating arcstat in jkstat. OK, I have an old version, but it's pretty much out of date and I need to refresh it. -- -Peter Tribble http://www.petertribble.co.uk/ - http://ptribble.blogspot.com/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
