tokyo-tyrant in memory database like redis or can it grow larger then memory and retrieve from harddrive

Question

Tokyo-tyrant in memory database like redis(allthough redis has VM?) or can it grow larger then memory and retrieve from harddrive. If so how does it achieve that?

Answer 1

Tokyo Tyrant is just a network interface to Tokyo Cabinet, not an actual database server. Tokyo Cabinet has support for both in-memory and on-file storages. When you start Tokyo Tyrant's ttserver the database name you specify is the type of storage that will be used. For instance, if you start up ttserver with:

ttserver "*" -- in-memory hash
ttserver "+" -- in-memory tree
ttserver /var/ttserver/casket.tch -- on-disk hash
ttserver /var/ttserver/casket.tcb -- on-disk b-tree
ttserver /var/ttserver/casket.tct -- on-disk fixed-length