The Datastore is the facility used to persist the data of the applications.
In the Triangular Node.js variant of the development configuration this is provided by the Server Node.js Variant. Both the local development environment and the production deployed version use the same scheme. In fact the deploying into production of a local development environment uses the local data structure as its starting point.
Triangular deploys its NodeJS Site at NodeJitsu Node.js Hosting
Both local and production use the same data structure. The default base name is TRI-DB within the deployed structure. Each app is stored within a folder of the app name.
Each Record Key/Data file is stored as one of 3 types.
$super - the SuperUser credentials$user - AdminUsers and Users within the respective apps folder. The role:admin distuinguishes them.$data - the data records.During startup the NodeJS Server loads the directory structure into an internal table. The db command may be used to see this
if the local console has been turned on with the -quit option.
The Node.js single threaded architecture made the potential file contention issue a non-issue. Whenever a record is to be physically written a copy is placed into
the rec.data field of the structure and the write started. When the write completes the rec.data field is cleared. If a read occurs during the time
the rec.data field has a value this value is returned to the requester immediately. Otherwise a normal read takes place and the contents returned to the requester
when it completes.
The GekID field is ignored and set to a value of 1.
The CreateTS and UpdateTS fields are derived from the Node.js fs.stat command using the
ctime and mtime values converted to milliseconds using getTime().
The passwords on the system are encrypted using a mangle property in the SuperUser that is randomly created when the
SuperUser is created. This value should not be changed without resetting all the passwords. The randomness of this string
makes it difficult to derive the password even if the encrytped value is known. The mangle value should be kept secret for this reason.