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       bup-bloom - generates, regenerates, updates bloom filters


       bup bloom [-d dir] [-o outfile] [-k hashes] [-c idxfile] [-f] [--ruin]


       bup bloom  builds  a  bloom  filter  file for a bup repository.  If one already exists, it
       checks the filter and updates or regenerates it as needed.


       --ruin destroy bloom filters by setting the whole bitmask to zeros.  you  really  want  to
              know what you are doing if run this and you want to delete the resulting bloom when
              you are done with it.

       -f, --force
              don't update the existing bloom file; generate a new one from scratch.

       -d, --dir=directory
              the   directory,   containing   .idx    files,    to    process.     Defaults    to

       -o, --outfile=outfile
              the file to write the bloom filter to.  defaults to $dir/bup.bloom

       -k, --hashes=hashes
              number  of  hash  functions  to  use  only  4  and  5 are valid.  defaults to 5 for
              repositories < 2 TiB, or 4 otherwise.  See comments in  for  more  on  this

       -c, --check=idxfile
              checks the bloom file (counterintuitively outfile) against the specified .idx file,
              first checks that the bloom filter is claiming to contain  the  .idx,  then  checks
              that  it  does  actually  contain  all  of the objects in the .idx.  Does not write
              anything and ignores the -k option.


       Part of the bup(1) suite.


       Brandon Low <>.