1 # This value should be increased whenever changing the structure of
2 # any object that will appear in a type 'map' master file (which
3 # contains a working memory image of an RBT database), as loading
4 # an incorrect memory image produces an inconsistent and probably
5 # nonfunctional database. These structures include but are not
6 # necessarily limited to dns_masterrawheader, rbtdb_file_header,
7 # rbt_file_header, dns_rbtdb, dns_rbt, dns_rbtnode, rdatasetheader.
9 # Err on the side of caution: if anything in the RBTDB is changed,
10 # bump the value. Making map files unreadable protects the system
11 # from instability; it's a feature not a bug.
13 # Whenever releasing a new major release of BIND9, set this value
14 # back to 1.0 when releasing the first alpha. Fast files are *never*
15 # compatible across major releases.