UNIX for Dummies Questions & Answers

I agree there is an nfs bug here. I still would like to know if nodevs is set. What does "nfsstat -m" say?

Is it because the shell issue by default an OPEN() statement as opposed to a CREAT()??

The man page for CREAT() tells me "this system call creates a new regular file or prepares to rewrite an existing file...".

The man page for OPEN() seem to hint that when a file is first created with that system call using the general flag O_CREAT.

The first one seems to make more sense than the latter to me. Regardless of the file-system in use. It makes me think that I would better off learning C to circumvent this type of issues...

There you go:
[dev1@la]/home/dev1% nfsstat -m
/home/dev1 from cafs:/shared/homedirs/dev1 (Addr 10.27.230.133)
Flags: vers=3,proto=udp,auth=unix,soft,intr,link,symlink,rsize=8192,wsize=8192,retrans=5
Lookups: srtt= 7 ( 17ms), dev= 3 ( 15ms), cur= 2 ( 40ms)
Reads: srtt= 8 ( 20ms), dev= 4 ( 20ms), cur= 3 ( 60ms)
Writes: srtt= 17 ( 42ms), dev= 6 ( 30ms), cur= 5 (100ms)
All: srtt= 7 ( 17ms), dev= 3 ( 15ms), cur= 2 ( 40ms)

/admin from oak:/admin (Addr 176.36.50.231)
Flags: vers=3,proto=udp,auth=unix,hard,intr,link,symlink,rsize=8192,wsize=8192,retrans=5
Lookups: srtt= 8 ( 20ms), dev= 4 ( 20ms), cur= 3 ( 60ms)
Reads: srtt= 13 ( 32ms), dev= 7 ( 35ms), cur= 5 (100ms)
Writes: srtt= 1 ( 2ms), dev= 1 ( 5ms), cur= 0 ( 0ms)
All: srtt= 8 ( 20ms), dev= 4 ( 20ms), cur= 3 ( 60ms)

/home/labcop from opsla:/users/labcop (Addr 176.36.50.207)
Flags: vers=3,proto=udp,auth=unix,soft,intr,link,symlink,rsize=8192,wsize=8192,retrans=5
All: srtt= 0 ( 0ms), dev= 0 ( 0ms), cur= 0 ( 0ms)

/export from dbsla:/export1 (Addr 172.31.50.210)
Flags: vers=3,proto=udp,auth=unix,hard,intr,link,symlink,rsize=8192,wsize=8192,retrans=5
Lookups: srtt= 3 ( 7ms), dev= 3 ( 15ms), cur= 1 ( 20ms)
Reads: srtt= 1 ( 2ms), dev= 1 ( 5ms), cur= 0 ( 0ms)
Writes: srtt= 1 ( 2ms), dev= 1 ( 5ms), cur= 0 ( 0ms)
All: srtt= 5 ( 12ms), dev= 3 ( 15ms), cur= 2 ( 40ms)

[dev1@la]/home/dev1%

Thanks for taking the time to help me with this. I appreciate it.

Though I may do more harm than good, I agree with you. Any book suggestion that could get me started?

Well, it doesn't even have nodevs set. This is a very nasty bug because the behavior it exhibits is hard to understand. Bugs like that are a real problem when you're learning unix.

And yes, a deep understanding of the kernel can be gained by being a C programmer. And that is a big help with cases like this. Advanced Programming in the UNIX Environment by Richard Stevens is the best book I know of.

I would check to see if I had the latest nfs patches. But your system administrator will need to do that.

Thanks guys for all your help. I reported your findings to our SysAdmin.

Thanks again!

I really enjoyed reading this thread.

Great job everyone.