WIP: Initial commit.

README.md

@@ -1,3 +1,48 @@
 # 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
+...