Re: [Exist-open] Isolation Levels

[Wolfgang M. <wol...@ex...>]

> What are the isolation levels in the current build of eXist DB as a
> server {newcore 1.1.1}?
>
> For instance, if user1 is trying to update a parent node, while user2 is
> simultaneously attempting to update a node which is a child or
> grandchild of the same parent node, what happens? Or do you "lock" all
> nodes from the parent on down, until they are completed by user1?, only
> allow dirty-reads, etc, etc...

eXist currently locks at the document-level (sometimes we will
probably need to move to node-level locks, but there's some more work
to be done before that).

Dirty reads are possible during queries, i.e. a read-only query can
have references to nodes which were removed in the meantime.

> Does eXist allow for some configuration of isolation levels, or am I on
> my own to figure out what to do in these cases?

No, I fear this part of eXist is not configurable yet.

Wolfgang