NFS write() calls lead to read() calls?
Ivan Voras
ivoras at fer.hr
Wed Mar 28 16:04:03 UTC 2007
Ulrich Spoerlein wrote:
> What kind of C program or script did you have in mind? My C-foo is very
> weak ...
If you have python installed, this is a simple way:
----
print "writing"
f = file("a_file", "w")
for x in xrange(1024): # write 1024 MB
f.write(' '*1024*1024)
f.close()
raw_input("press enter to rewrite")
print "rewriting"
f = file("a_file", "r+")
for x in xrange(1024): # write 1024 MB again
f.write(' '*1024*1024)
f.close()
----
save it to a file, run the file with python interpreter. If you don't
observe the weird read-before-write effect, then it's not a problem in
FreeBSD / NFS.
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