metastore is atool to storethe metadata offiles/directories/linksin a file treeto a separatefile and tolater compareand apply thestored metadatato said filetree. It wasoriginallywritten as asupplement togit, which doesnot store allmetadata,making itunsuitable fore.g. storing/etc in arepository. metastore canalso be helpfulif you want tocreate atarball of afile tree andmake sure that"everything"(e.g. xattrs,mtime, owner,group) isstored alongwith the files.