User:Rkent/Folder Data Persistence

Intro

The point of this page is to record notes on understanding data persistence of information associated with folders. This is complicated because the information is frequently stored in multiple in-memory objects, as well as in two different database: dbFolderInfo which is a table of the main folder message summary database, as well as panacea.dat which is a cache of the same information.

These notes were prepared to understand proposals in bug 1032360: "nsMsgLocalMailFolder::GetSizeOnDisk seems to return wrong value for maildir store" to persistently store the folder size, but should be applicable to other issues of folder persistence.