On 1/20/2015 5:18 AM, Clemens Wyss DEV wrote:
http://stackoverflow.com/questions/10805117/solr-transaction-management-using-solrj
Is it true, that a SolrServer-instance denotes a "transaction context"?
Say I have two concurrent threads, each having a SolrServer-instance "pointing" to the
same core. Then each thread can add/update/delete documents without "affecting" the other
thread/SolrServer-instance?
Must <autoCommit> be switched off for this to work?
Solr does not provide transactional isolation like you might be familiar
with from a relational DB. There are commit and rollback, so no updates
are seen until a commit (including autocommit), but a key difference is
that when one client commits, all clients will see the updates, since
index readers are shared, not associated with a specific client. The
underlying Lucene index has the ability to maintain an open reader even
after another writer has issued a commit, but this isn't accessible via
Solr.
-Mike
