13 Sep
2019
13 Sep
'19
2 p.m.
On 2019-Sep-13 15:54:32 +1000, Dave Horsfall <dave(a)horsfall.org> wrote:
NFS ran much faster when you turned off the UDP checksums as well.
(Though there was still the Ethernet CRC32).
--
Peter Jeremy
On Thu, 12 Sep 2019, Larry McVoy wrote:
I think that was deliberate. ISTR editing SCCS files and repairing the
checksum as well, though I don't recally exactly how.
But here is an SCCS win. SCCS has a 16 bit
ignore the carry bit
checksum over the whole file. RCS has none of that.
Giggle... I found I could actually *edit* an SCCS file, provided I reset
the checksum to zero (it was then recalculated). B) NFS errors.
So all NFS implementations, Suns included, had a bad
habit of returning a block of nulls. I dunno why but that is a thing.
The SCCS checksum would detect that. RCS and CVS did not have a
checksum so when NFS returned garbage, they were happy to return that to
you.
I believe that NFS is much more reliable now (yes, it used to be awful).