Design and Architecture of CockroachDb


Cockroach keys are arbitrary byte arrays. If textual data is used in keys, utf8 encoding is recommended (this helps for cleaner display of values in debugging tools). User-supplied keys are encoded using an ordered code. System keys are either prefixed with null characters (\0 or \0\0) for system tables, or take the form of to sort user-key-range specific system keys immediately after the user keys they refer to. Null characters are used in system key prefixes to guarantee that they sort first.