Hello! Radim there is a JIRA issue - https://issues.apache.org/jira/browse/SOLR-3755. It is work in progress, but once finished Solr will enable you to add additional shards on a live collection and split the ones that were already created.
-- Regards, Rafał Kuć Sematext :: http://sematext.com/ :: Solr - Lucene - Nutch - ElasticSearch > Given that Solr does not support distributed IDF, adding a shard without > balancing the number of documents could seriously skew your scoring. If > you are okay with that, then the next question is what happens if you > download the clusterstate.json from ZooKeeper, and add another entry, > along the lines of "shard3":{}, then upload it again, what would happen > then? > My theory is that the next host you start up would become the first node > of shard3. Worth a try (unless someone more knowledgeable tells us > otherwise!) > Upayavira > On Mon, Oct 8, 2012, at 01:35 AM, Radim Kolar wrote: >> i am reading this: http://wiki.apache.org/solr/SolrCloud section >> Re-sizing a Cluster >> >> Its possible to add shard to an existing index? I do not need to get >> data redistributed, they can stay where they are, its enough for me if >> new entries will be distributed into new number of shards. restarting >> solr is fine.
