Internal LevelDB Setup

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Calvin Metcalf edited this page Apr 17, 2014 · 1 revision

While this is just for the LevelDB adapter, the IndexedDB and WebSQL ones are setup similarly.

We use LevelUp as a driver for LevelDB and partition the database using SubLevel into 4 sub databases.

docStore stores document metadata by doc id
bySeqStore stores document content by sequence number, and since sequence numbers will always be binary, database metadata is stored here with string keys.
attachmentStore stores some sort of index for attachments
binaryStore stores actual attachments

to get a document you first get the document sequence number by querying the docStore and then query the bySeqStore to get the document data.

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