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When you create a branch, in reality what you do is you add a little bit of data to the repository side RCS file (filename,v) exactly the same way as when you tag it. A branch is just a different kind of tag. So the file is not duplicated at all, it is the same file on the server but the symbols list of that file has a new member, which is the tag name and the file revision it points to. A branch revision always contains a zero in the numbers (ordinary tags do not). When you commit changes to a file in general a diff is computed by CVS and stored in the RCS file with reference info to tell CVS the end points of the diff. This process is exactly the same for edits made on a branch and on the trunk. HTH Best regards, Bo Berglund -----Original Message----- From: cvsnt-bounces at cvsnt.org [mailto:cvsnt-bounces at cvsnt.org] On Behalf Of Nick Duane Sent: den 18 augusti 2006 12:57 To: cvsnt at cvsnt.org cvsnt downloads at march-hare.com @CVSNT on Twitter CVSNT on Facebook Subject: [cvsnt] How are branches stored in repository,in terms of storage space efficiency? If I create a branch of a module how is that stored in the repository? Is a copy made of each and every file in that module? Or are only the diffs of the files that are changed added? Is there some document that talks about this? Thanks, Nick _______________________________________________ cvsnt mailing list cvsnt at cvsnt.org cvsnt downloads at march-hare.com @CVSNT on Twitter CVSNT on Facebook http://www.cvsnt.org/cgi-bin/mailman/listinfo/cvsnt https://www.march-hare.com/cvspro/en.asp#downcvs