On Tue, 27 Aug 2019 at 21:57, Peng Yu <pengyu...@gmail.com> wrote: > I haven't found an archive format that allows in-place delete (I know > that .zip, .7z and .tar don't). This means that whenever delete is > needed, the original archive must be copied first. This can be > problematic when the archive is large and the file to delete is small. > > Something along the line of the ability of sqlite3 to perform in-place > delete might be a useful feature for archives. But I haven't found any > such archive format. Does anybody know one? Thanks. >
Note that you wouldn't actually reclaim any disk space by deleting a file in-place from an archive backed by sqlite -- unless you issue a VACUUM, which rewrites the whole DB. Without a VACUUM, the free pages within the DB would only be taken advantage of by future additions to the archive. That may be an acceptable compromise for the delete-small-file-from-large-archive use case you're presenting, but the fact that archive formats are generally designed to minimise storage requirements goes a long way towards explaining why the scenario is not well-catered for. It also raises the question of whether an archive is the correct tool for the job! -Rowan _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
