xcopy fails on NFS

[Johan]

Hi,

I am working on Workbench 2.6. This is my configuration,

Server A (NFS server)
target B (mounts the NFS server)

When i tried xcopy (in target B) to copy a folder in the server to
another location in the server, it fails halfway stating that it
cannot read the input file or cannot write to the destination.

I have checked and all files are valid. Why is the xcopy not able to
finish copying all files?? I also notice that this problem only occurs
for a large number of files. If i tried copying a folder that have
only limited no of files, it works.
(Note that i do not have files >2GB).

Is there some kind of limitation to NFS such that it cannot handle
multiple files transfer, or can only handle file transfer till its
buffer is full?? I even tried writing my own directory traversing
function to replace xcopy but gives the same result.
Thanks!

[leonid.r...@gmail.com]

I suspect this has to do with the NFS Handle cache.

NFS does not easily map to a FAT based file system, so an intermediate
cache must be used to store handle codes and their corresponding FAT
file names. NFS also does not have a close() operation, so the NFS
server
does not really know when a handle can be disposed of, so it would
need to
discard handle entires based on the time they have not been used.
With "Xcopy" you will use up a lot of handles very quickly overflowing
the handle store by not giving it a chance to delete unused handles.

If you had some really big files in the file set, the problem may have
not happened.