Hi Xuechen,
I believe that this is possible with the varstrip distribution in PVFS.
Here is some further information:
http://www.pvfs.org/fisheye/browse/PVFS/doc/pvfs2-tuning.tex?r=1.1.22.1#l328
For example, I think on directory A you would set something like:
setfattr -n user.pvfs2.dist_name -v varstrip_dist A
setfattr -n user.pvfs2.dist_params -v "strips:0:64K;1:64K" A
And this for B:
setfattr -n user.pvfs2.dist_name -v varstrip_dist B
setfattr -n user.pvfs2.dist_params -v "strips:2:64K;3:64K" B
That should automatically set the number of datafiles to 2 based on the
distribution parameters, but it is possible that some previous releases
didn't do that. If you have trouble use these commands to make it explicit:
setfattr -n user.pvfs2.num_dfiles -v "2" A
setfattr -n user.pvfs2.num_dfiles -v "2" B
A few other misc. pointers:
- this only affects new files in any given directory and does not change
existing files
- make sure to test the results by using "pvfs2-viewdist -f <filename>"
to see how new files are distributed
-Phil
Xuechen Zhang wrote:
There is a question about setting PVFS2 directory attributes. I have
four I/O servers (0-3). I want to locate file A in directory A on server
0&1 and file B in directory B on server 2&3 by settting stripe
distribution for the two directory. Can I implement this kind of
distribution in PVFS2? If not, any suggestion for that? Thanks.
Xuechen
------------------------------------------------------------------------
_______________________________________________
Pvfs2-users mailing list
[email protected]
http://www.beowulf-underground.org/mailman/listinfo/pvfs2-users
_______________________________________________
Pvfs2-users mailing list
[email protected]
http://www.beowulf-underground.org/mailman/listinfo/pvfs2-users
