Can Polyhedra store its databases on flash memory?
Polyhedra is an in-memory database, and thus the ‘live’ copy of the database is in RAM. To allow for data persistence through a system crash, and to allow the database to be stopped in a controlled fashion and later restarted, Polyhedra allows for ‘snapshots’ of the schema and the current data to be written to file; where one wants higher protection against loss of data, Polyhedra can be configured in fault-tolerant configurations, and also can be configured to journal all significant changes to file. Polyhedra uses standard library calls to save data to persistent storage in ‘files’, and so depending on how the operating system is configured the snapshot and journals can be stored on local disc, a remote filing system (via NFS or Samba, say), or even on flash memory. However, in some cases, particularly on embedded systems, a POSIX-compliant filing system is not available for the media in use. For such cases, or (given the way Polyhedra makes use of files to save databases) for when m
