Hi, As documented, LOG is the transaction log, it is shared among all sessions. See also
http://en.wikipedia.org/wiki/Transaction_log http://h2database.com/html/grammar.html#set_log UNDO_LOG is per session, to undo an operation (an update that fails for example) and to rollback a transaction. Theoretically, the transaction log could be used, but for simplicity, H2 currently uses it's own "list of operations" (usually in-memory). With the MVStore, this is no longer needed (just the transaction log). http://h2database.com/html/grammar.html#set_undo_log Regards, Thomas On Fri, Sep 13, 2013 at 5:09 AM, Brian Craft <[email protected]> wrote: > I don't understand the difference between these two. The docs on the "set" > commands are pretty sparse, but both mention transactions. Are they > explained anywhere? > > -- > You received this message because you are subscribed to the Google Groups > "H2 Database" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/h2-database. > For more options, visit https://groups.google.com/groups/opt_out. > -- You received this message because you are subscribed to the Google Groups "H2 Database" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/h2-database. For more options, visit https://groups.google.com/groups/opt_out.
