Issue
i converted my android app from mapdb to objectbox, i've seen on github a few people reporting database corruption with objectbox and the solution has always been to call usePreviousCommit in case of problems.
since the objectbox core is close source I wanted to know what usePreviousCommit does internally
are there 2 physical copies of the database? and calling usePreviousCommit reverts to the previous copy?
or does it work in a more complex way? (if yes i wanted to know how)
i opened this question because i want more information from objectbox before i continue to use it in production.
Solution
The key word is multiversion-concurrency. Think of a B+ tree with copy-on-write. The previous root tree (aka the previous commit) is preserved, so you can use when opening.
Answered By - Markus Junginger
