Explicitly set start and rows per shard for more efficient bulk queries across
distributed Solr
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Key: SOLR-659
URL: https://issues.apache.org/jira/browse/SOLR-659
Project: Solr
Issue Type: Improvement
Components: search
Affects Versions: 1.3
Reporter: Brian Whitman
Priority: Minor
Fix For: 1.3
Attachments: shards.start_rows.patch
The default behavior of setting start and rows on distributed solr (SOLR-303)
is to set start at 0 across all shards and set rows to start+rows across each
shard. This ensures all results are returned for any arbitrary start and rows
setting, but during "bulk queries" (where start is incrementally increased and
rows is kept consistent) the client would need finer control of the per-shard
start and rows parameter as retrieving many thousands of documents becomes
intractable as start grows higher.
Attaching a patch that creates a &shards.start and &shards.rows parameter. If
used, the logic that sets rows to start+rows per shard is overridden and each
shard gets the exact start and rows set in shards.start and shards.rows. The
client will receive up to shards.rows * nShards results and should set rows
accordingly. This makes bulk queries across distributed solr possible.
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