[Linux-cluster] speeding up df/statvfs( ) calls to large GFS volumes?

[Jeffrey Bethke]

Hi!  
   Is there a way to speed up the return vaules for df/statvfs( ) when 
using large GFS volume(e.g 25TB+)?  I'm currently working a problem 
where, as part of disk monitoring,  we need to run a statvfs( ) every 
few minutes. The problem is that we can't determine the interval of 
running the tool as GFS can, on occasion,  take a long time  to return a 
value!

So, is there any variable I can tweak w/ gfs_tool, or mount option I can 
apply outside of 'noatime',  that will help things like 'df -h' run 
consistently faster? 

Help?

Thanks!
.jeff