debian man page for srf_index_hash

srf_index_hash(1)						   Staden io_lib						 srf_index_hash(1)

NAME
       srf_index_hash - Adds a hash-table index to an SRF file.

SYNOPSIS
       srf_index_hash  [-c] srf_archive

DESCRIPTION
       srf_index_hash  adds  and index to an SRF file or replaces an existing index with a new one. In the case of concatenated SRF files only the
       index at the end of a file will be replaced, but internal indices will not be consulted by SRF tools.

       The index is a hash table indexing the sequence names only. The name itself does not appear in the index, rather the top 7-bits of a 64-bit
       hash  key  are held in the index along with N-bits used to determine the hash bucket. This reduces the index size to around 10-15 bytes per
       sequence.

OPTIONS
       -c     Check only. This requests that the index is not produced, but the checks performed during the creation of an index (such as  looking
	      for duplicate sequence names) are still performed.

AUTHOR
       James Bonfield, Wellcome Trust Sanger Institute

								   September 29 						 srf_index_hash(1)