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From sha...@apache.org
Subject lucene-solr:jira/solr-11990: SOLR-11990: Added note about co-location guarantees being one way only
Date Sat, 28 Jul 2018 06:19:58 GMT
Repository: lucene-solr
Updated Branches:
  refs/heads/jira/solr-11990 8557cbc8a -> 1857075fd


SOLR-11990: Added note about co-location guarantees being one way only


Project: http://git-wip-us.apache.org/repos/asf/lucene-solr/repo
Commit: http://git-wip-us.apache.org/repos/asf/lucene-solr/commit/1857075f
Tree: http://git-wip-us.apache.org/repos/asf/lucene-solr/tree/1857075f
Diff: http://git-wip-us.apache.org/repos/asf/lucene-solr/diff/1857075f

Branch: refs/heads/jira/solr-11990
Commit: 1857075fdb9d535b6149ad4369fed8b64b0c01f6
Parents: 8557cbc
Author: Shalin Shekhar Mangar <shalin@apache.org>
Authored: Sat Jul 28 11:49:51 2018 +0530
Committer: Shalin Shekhar Mangar <shalin@apache.org>
Committed: Sat Jul 28 11:49:51 2018 +0530

----------------------------------------------------------------------
 solr/solr-ref-guide/src/colocating-collections.adoc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/lucene-solr/blob/1857075f/solr/solr-ref-guide/src/colocating-collections.adoc
----------------------------------------------------------------------
diff --git a/solr/solr-ref-guide/src/colocating-collections.adoc b/solr/solr-ref-guide/src/colocating-collections.adoc
index 1fc1ca6..cc6b518 100644
--- a/solr/solr-ref-guide/src/colocating-collections.adoc
+++ b/solr/solr-ref-guide/src/colocating-collections.adoc
@@ -18,7 +18,7 @@
 // specific language governing permissions and limitations
 // under the License.
 
-Solr provides a way to co-locate two collections together so that cross-collection joins
are always possible.
+Solr provides a way to co-locate a collection with another so that cross-collection joins
are always possible.
 
 The co-location guarantee applies to all future Collection operations made either via Collections
API or by Autoscaling
 actions.
@@ -69,3 +69,8 @@ which can prevent such overloading by e.g. setting the maximum number of
cores p
 
 Example:
 `{'cores' : '<8', 'node' : '#ANY'}`
+
+The co-location guarantee is one-way only i.e. a collection 'X' co-located with 'Y' will
always have one or more
+replicas of 'Y' on any node that has a replica of 'X' but the reverse is not true. There
may be nodes which have one or
+more replicas of 'Y' but no replicas of 'X'. Such replicas of 'Y' will not be considered
a violation of co-location
+rules and will not be cleaned up automatically.
\ No newline at end of file


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