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# mmtable
Memory mapped column oriented tables for Go.
Memory mapped columnar table library.
Goals:
* On-disk memory mapped table
* Table consists of columns of various primitive types
* Columns have fixed-size elements
* Lock for single writer
* Allow multiple readers
* Commands:
* Add column
* Remove column
* SetCapacity (offline)
* Append one table to another
Types of columns:
* byte
* bool
* int8
* int16
* int32
* int64
* uint8
* uint16
* uint32
* uint64
* float32
* float64
* array of any primitive type
Layout:
dir/
lock
length (written atomically)
data
Table data layout:
0000-0008 Version
0008-0016 Capacity (uint64)
0016-XXXX Serialized Schema
XXXX-YYYY Data for column 1
YYYY-ZZZZ Data for column 2
...

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