Storing Tuples on Disk
ETS tables store tuples in memory. DETS (short for Disk ETS) provides Erlang tuple storage on disk. DETS files have a maximum size of 2GB. DETS files must be opened before they can be used, and they should be properly closed when finished with. If they are not properly closed, then they will be automatically repaired the next time they are opened. Since the repair can take a long time, it’s important to close them properly before finishing your application.
DETS tables have different sharing properties from ETS tables. When a DETS table is opened, it must be given a global name. If two or more local processes open a DETS table with the same name and options, then they will share the table. The table will remain open ...
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