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RCS
RCS is not an SCM system, it is a file based system.
However, many commercial systems use the inferior RCS file format
so we felt it was worth having RCS in the comparisons.
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RCS has no checksum.
RCS files can get silently corrupted and RCS will never notice
unless you happen to ask for a delta that is part of the corrupted
area of the file.
Because of the way RCS is designed, it is unlikely to ever notice
a problem until too late.
BitKeeper checksums the entire file as well as each delta and
verifies the checksum on each operation.
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Lack of compression.
BitKeeper supports compressed contents.
The administrative part of the file (typically less than 5% of the
file size) is uncompressed;
the rest may be compressed to gain back disk space and use less
disk/network bandwidth.
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RCS has no rename support.
BitKeeper records pathnames with the deltas so that files may be
moved around easily without losing track of where they once lived.
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