PLOUFF%mit-mc@sri-unix.UUCP (01/23/84)
From: Robert L. Plouffe <PLOUFF@mit-mc> 1. "Mea Culpa" on stack imbalance at label MONIN: Thanks to Dick Mead for finding that one. that got in there. 2. Data capture buffer is NOT affected by fifer size. It uses all of memory up to the CCP or optionally can ehe CCP. The 2k floppies. 16k of buffering does not buy anythingfile transfer speed. Try it both ways and you will see for yourseason for SECTORnot upsetting the protocol when a file transfer i a remote that is under BYE and the 'Q' switch is not set so thatreporting is seethe ACKNAK flag and has nothing to do with ARPANEtthis is slightly different from the original CHRISTENSEN protocompletely compator upon a 10 sec timeout. 4. Sorry for delay inall of the discue Country for 10 days and just returned. 5. In vve discussion, arce code to give a 2k file transfer buffer AND thCKNAK flag to penly (or timeout)..
PLOUFF%mit-mc@sri-unix.UUCP (01/23/84)
From: Robert L. Plouffe <PLOUFF@mit-mc> 1. "Mea Culpa" on stack imbalance at label MONIN: Thanks to Dick Mead for finding that one. I don't know how that got in there. 2. Data capture buffer is NOT affected by file transfer buffer size. It uses all of memory up to the CCP or optionally can even overwrite the CCP. The 2k size recommendation has to do with the slowness of floppies. 16k of buffering does not buy anything with respect to file transfer speed. Try it both ways and you will see for yourself. 3. The reason for SECTOR_RESEND_ON_VALID_NAK only has to do with not upsetting the protocol when a file transfer is being made FROM a remote that is under BYE and the 'Q' switch is not set so that full progress reporting is seen at both ends. Thus is the reason for killing the ACKNAK flag and has nothing to do with ARPANET. I realize that this is slightly different from the original CHRISTENSEN protocol, but it is completely compatible with it. So in MDM716, repeats are done only if a valid NAK is received or upon a 10 sec timeout. 4. Sorry for delay in responding to all of the discussion of the past week or so, but I was out of the Country for 10 days and just returned. 5. In view of the above discussion, and if you use MDM717 as released by HOFF, I recommend the you modify the source code to give a 2k file transfer buffer AND that you set the ACKNAK flag to permit resending of sectors upon receipt of valid NAK only (or timeout)..