[Lustre-discuss] query mds for 'stat' info

[Isaac Hailperin]

Hello list,

I'd like to implement sliding window and hight water mark deletion on a 
lustre filesystem. For that I need information from all files. A first 
idea was to recursivly traverse the file tree and to a `stat filename` 
for every file to collect the meta data.

Now since in lustre the meta data is stored on the mds, I though that 
maybe there is a more efficient way of collecting the information.

So the question is: is there a way that I could query the mds for the 
information that stat would give me(I need access, modify, creation time 
plus the file size). And if so, can someone guess the performance 
increase of quering the mds directly over using `stat` ?

We are using lustre 1.6.something.

Isaac