Sean Liu writes:
 > Hi Jim,
 > 
 > Thanks for your reply, and that's good information.
 > I actually did most of what you suggested.
 > I started with dtrace and seems every system call takes longer to run
 > on the filesystem when it is shared than not. So that's why I needed
 > to understand what actually happens in the kernel. 
 >

Is this saying that "tar x over NFS" is much slower than 
"tar x over UFS,ZFS,VxFS,..." ? 

Is so, this is by design of NFS. Not much  you can do about it.
Maybe NFS V4++ will find a way....

This somewhat touches the subject :
        http://blogs.sun.com/roch/entry/nfs_and_zfs_a_fine 

HTH
-r

 > Anyway I found color.d from Brendan's blog, which is quite helpful, it 
 > traces into all the way into every module. 
 > 
 > Thanks again.
 > 
 > Sean
 >  
 >  
 > This message posted from opensolaris.org
 > _______________________________________________
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 > perf-discuss@opensolaris.org


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