Jukka Zitting wrote:
Marcel, just out of curiosity, would it be possible to run the indexer
using asynchronous events or would that cause some complications?
yes, there are two issues with this approach:
- there would be no guarantee anymore that you will find nodes with a
query that were just added. This then depends on when the asynchronous
notification updates the index.
- in case of a jvm crash right after a change, that change might not be
reflected in the index.
while the first point is just a temporary inconsistency, the latter is
severe and cannot be recovered.
IMO the index should even participate in the internal two phase commit.
With the current design a failure while indexing a change cannot
rollback the change.
But it's certainly possible to push more of the index work into an
background thread. most of the indexing is currently done with the
current thread.
regards
marcel
