: I wish to copy the index on a different disk than the disk that solr
: instance is using, then tell the solr server to switch from the current data
: dir to the location where I copied the hadoop generated index (without
: having search service interruptions).
One way to do this would be to CREATE a new SolreCore pointed at the new
directory, and then use the SWAP command to replace the old core with the
new one...
http://wiki.apache.org/solr/CoreAdmin
...this can all be done with a live Solr instance, w/o ever needing to
interupt existing service.
That siad: there may also be a way to do this with a single SolrCore --
the ReplicationHandler pulls snapshots from a master into a new directory,
and then tells the SolrCore to change it's index directory (allowing it to
do cache warming against the new index based on the cache keys from the
old index -- something that's not possible with SolrCore SWAPing) ... I'm
not sure off the top of my head how ReplicationHandler does this, but
there must be a java hook for it somewhere, so you could probably
generalize it into a command that lets you start using an arbitrary
directory.
: Is it possible? Anyone has a better solution?
You might see if you can extend the ReplicationHandler to pull from HDFS?
-Hoss
