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" and "zlib". 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, trailer, and data block offset arrays.