Hi Alex,

Oracle DB have very powerful feature for recovery operations http://docs.oracle.com/cd/B28359_01/server.111/b28310/onlineredo001.htm

in BaseX, the current way to avoid loss of data is to create regular backups, e.g. via the integrated CREATE BACKUP command [1]. The concept of the Pending Update List [2] helps a lot to avoid corruptions during single database updates.

I agree that a fully automatic recovery framework may be desirable, but is currently out of scope. This may change when we will eventually switch to MVCC [3].

Christian

[1] http://docs.basex.org/wiki/Commands#CREATE_BACKUP [2] http://docs.basex.org/wiki/XQuery_Update#Pending_Update_List [3] http://en.wikipedia.org/wiki/Multiversion_concurrency_control