[Pvfs2-developers] ncache causes shared creat problems

[Pete Wyckoff]

pcarns at wastedcycles.org wrote on Mon, 28 Aug 2006 19:02 +0200:
> What happens on each iteration?  Does the code at some point delete a 
> file with a particular name and then create a new one with the same name?

Each iter (of which there are 200, but it fails on #2 or 3) does:

    task0
	rm file
    task0 and task1
	fd = creat(file, 0644);
	close(fd)
    barrier

So yeah, the file gets deleted by just one task.  Then they all
simultaneously try to create it again.

Source is here

    ftp://ftp.llnl.gov/pub/siop/simul/simul-1.12.tar.gz

grep for simul_creat in the one source file in there.

		-- Pete