NAME

       mtbl_info - display information about an MTBL file

SYNOPSIS

       mtbl_info FILE [FILE]...

DESCRIPTION

       mtbl_info(1) displays the following information about the MTBL files specified on the
       command line.

       file name — the name of the MTBL file.

       file size — the total size of the MTBL file, in bytes.

       index bytes — the total number of bytes and proportion of the total file size consumed by
       the index.

       data block bytes — the total number of bytes and proportion of the total file size
       consumed by data blocks.

       data block size — the maximum size of an uncompressed data block.

       data block count — the total number of data blocks.

       entry count — the total number of key-value entries.

       key bytes — the total number of bytes that all keys in the file would occupy if stored
       end-to-end in a byte array with no delimiters.

       value bytes — the total number of bytes that all values in the file would occupy if stored
       end-to-end in a byte array with no delimiters.

       compression algorithm — the algorithm used to compress data blocks. Possible values are
       "none", "snappy", "zlib", "lz4", and "lz4hc".

       compactness — a rough metric comparing the total number of bytes in the key-value entries
       with the total size of the MTBL file. It is calculated as (file size) / (key bytes + value
       bytes), and thus takes into account the gains of data block compression and prefix key
       compression against the overhead of the index, metadata, and data block offset arrays.

                                            07/17/2015                               MTBL_INFO(1)