MTBL_INFO(1)MTBL_INFO(1)NAMEmtbl_info - display information about an MTBL file
SYNOPSISmtbl_info FILE [FILE]...
DESCRIPTIONmtbl_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)
