Comment by pklausler
10 years ago
In short, RCS maintains a clean copy of the head revision, and a set of reverse patches to be applied to recreate older revisions. SCCS maintains a sequence of blocks of lines that were added or deleted at the same time, and any revision can be extracted in the same amount of time by scanning the blocks and retaining those that are pertinent.
Really old school revision control systems, like CDC's MODIFY and Cray's clone UPDATE, were kind of like SCCS. Each line (actually card image!) was tagged with the ids of the mods that created and (if no longer active) deleted it.
| CDC's MODIFY and Cray's clone UPDATE, were kind of like SCCS
Do you have references? I've heard of these but haven't come across details after much creative searching since they are common words.
See http://www.bitsavers.org/pdf/cdc/cyber/software/ .
Thank you! A peek into the (as far as I know) into root node of source control history.
I've heard that too. It comes from card readers somehow.