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der Mouse wrote:
>>I think it is a transmit problem so I've tried reducing the NFS write
>>size to 2K and haven't had any lockups yet.  However, I'm now getting
>>file corruption instead :(
> 
> 2K is still more than one Ethernet packet.  Try 1K.

True. But 2K is usually fine. I'm normally even on 4K.

> I saw peculiar NFS troubles to a VAX once, and while they appear
> unrelated to your troubles (mine were on a MicroVAX-II and were lockups
> when reading files of certain sizes, which I traced to an inability on
> the VAX's part to receive minimum-size packets, which occurred in IP
> traffic only as last fragments), reducing the rsize and wsize down
> below the max Ethenet packet size strikes me as worth trying.  I've
> also seen troubles which appear to be difficulty with back-to-back
> packets, though they have been less well understood.

The problems with back-to-back packets are pretty well understood, I'd 
say, and is why you shouldn't have large buffers with NFS.
The ethernet controller is setup with a certain number of receive 
buffers ready to receive packets. If you send more than that number of 
packets, you'll get lossage. And a VAX can be pretty slow, so it don't 
manage to process and free receive buffers fast enough to solve the problem.

Or are you talking about sending back-to-back packets without the 
mandatory quiet periods between packets?

	Johnny

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt@softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol

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