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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-11990) Make it possible to co-locate replicas of multiple collections together in a node
Date Sun, 29 Jul 2018 01:58:05 GMT

    [ https://issues.apache.org/jira/browse/SOLR-11990?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16560961#comment-16560961
] 

ASF subversion and git services commented on SOLR-11990:
--------------------------------------------------------

Commit 179c8f9b48af9bf3c327226d0e1fdbe460c4a325 in lucene-solr's branch refs/heads/master
from [~shalinmangar]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=179c8f9 ]

SOLR-11990: Make it possible to co-locate replicas of multiple collections together in a node.

A collection may be co-located with another collection during collection creation time by
specifying a
'withCollection' parameter. It can also be co-located afterwards by using the modify collection
API.
The co-location guarantee is enforced regardless of future cluster operations whether they
are invoked
manually via the Collection API or automatically by the Autoscaling framework.

Squashed commit of the following:

commit 3827703b38c598f1247c90ab57d3d640ab3a9e21
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Sat Jul 28 11:54:10 2018 +0530

    SOLR-11990: Added change log entry

commit 7977222e07ba47274062cb8d8a69e7956d644000
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Sat Jul 28 11:52:17 2018 +0530

    SOLR-11990: Added change log entry

commit 1857075fdb9d535b6149ad4369fed8b64b0c01f6
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Sat Jul 28 11:49:51 2018 +0530

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

commit 8557cbc8a511f21d1fcad99e11ea9d2104d0bef4
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Sat Jul 28 10:43:37 2018 +0530

    SOLR-11990: Remove unused import

commit 864b013fd744edca9b6b84a8a7573fab3c5310d5
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Sat Jul 28 10:21:59 2018 +0530

    SOLR-11990: Fixing compilation issues after merging master

commit dd840a2f7e765ee96c899d4d9ea89b6b67c5ae62
Merge: bb4ffb3 828d281
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Sat Jul 28 10:03:50 2018 +0530

    Merge branch 'master' into jira/solr-11990

    # Conflicts:
    #	solr/solr-ref-guide/src/collections-api.adoc
    #	solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Clause.java
    #	solr/solrj/src/java/org/apache/solr/client/solrj/cloud/autoscaling/Suggestion.java

commit bb4ffb32c4960a2809ac8927e214e1e012204a73
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Fri Jul 27 14:09:44 2018 +0530

    SOLR-11990: Ensure that the suggestion are validated by the policy engine otherwise move
to the next candidate replica or the next candidate node

commit a97d45b22f9c232e939f979502c761001be9ae24
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Fri Jul 27 13:22:10 2018 +0530

    SOLR-11990: Autoscaling suggestions for withCollection violations should prefer moving
replicas before adding replicas

commit 7b5a84338dfe7335599a5e96aff2d26cb4eeaac6
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Fri Jul 27 12:22:45 2018 +0530

    SOLR-11990: Fix statement about the behavior of the modify collection API when modifying
the withCollection parameter

commit 63aec4fe0de7025c16b6ebc47dad1004531ecee1
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Thu Jul 26 07:29:07 2018 +0530

    SOLR-11990: Added new page to the reference guide describing how to colocate collections
together including guarantees and limitations

commit 6bfcd0786bb30353de9c26a01ec97ce3191b58f8
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Wed Jul 25 21:42:25 2018 +0530

    SOLR-11990: Added another test which creates two collections which are colocated with
two different collections and ensures that create collection and add replica operations work
correctly

commit 4cead778f0044b6fb4012b085abf7b60350f495b
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Wed Jul 25 21:07:47 2018 +0530

    SOLR-11990: Stop or start jettys in test setup to ensure that we always have exactly 2
replicas running before a test starts

commit 70dbfd042c2164fcd76d406eeab1518e4d3147fb
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Wed Jul 25 19:19:07 2018 +0530

    SOLR-11990: Added description of the new withCollection parameter in the reference guide

commit 9d8260852b9d667d4d8e026432fd7727b7789393
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Wed Jul 25 19:16:46 2018 +0530

    SOLR-11990: Reset count down latch during test setup

commit ae508165571b1afde54337859b8d5fdbb1d67312
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Wed Jul 25 15:43:54 2018 +0530

    SOLR-11990: Add support for withCollection in simulated create collection API

commit 84f026b8c4cc25edb548430b8f5ad09d2486b3b5
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Tue Jul 24 17:21:33 2018 +0530

    SOLR-11990: Ported the refactoring made in CreateCollectionCmd to the simulated version
so that simulation tests are able to create collections correctly

commit defe111c9d31c8e4f0f00b4f2f3c875f5b2fa602
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Tue Jul 24 16:17:52 2018 +0530

    SOLR-11990: Add missing javadoc for return statement

commit 8e47d5bc4545548c5441909c3fcc1a7901b38185
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Tue Jul 24 16:11:45 2018 +0530

    SOLR-11990: Replace usage of forbidden Charsets with StandardCharsets class

commit 2d1b9eb25ea96a3a42c000ae654400ed44c17554
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Tue Jul 24 16:07:36 2018 +0530

    SOLR-11990: Extract ConditionType to an interface VarType along with a WithCollectionVarType
implementation

commit 1de2a4f52a59afca28de75bfa5156a3d6567a4f5
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Tue Jul 24 12:53:26 2018 +0530

    SOLR-11990: Pass strict-ness parameter to the ConditionType so that WITH_COLLECTION can
choose not to project add replica in strict mode.

    This ensures that add replica or move replica suggesters always choose nodes that already
have withCollection replicas first unless there are violations in doing so. Only if the first
pass fails to find a suitable replica, do we go to the other nodes in the cluster. This also
removes the need for the majority of changes in AddReplicaSuggester and so they've been reverted.

commit 0d616ed9e9bad791548c87086cba7760d724350d
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Tue Jul 24 11:36:34 2018 +0530

    SOLR-11990: Minor changes to formatting and code comments

commit 1228538f934f35f15797d89c2c66f2deb9cddd8c
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Mon Jul 23 14:26:19 2018 +0530

    SOLR-11990: Added a test which simulates a lost node and asserts that move replica suggester
moves the replica on the lost node to a node already having the withCollection present

commit 582f1fd98de93ab73c74a1f623749dd031beb381
Author: Noble Paul <noble@apache.org>
Date:   Mon Jul 23 18:35:22 2018 +1000

    SOLR-11990: NPE removing unnecessary System.out.println

commit 501bc6c1d066321b344bbb8b1de3c2ead52f8c49
Author: Noble Paul <noble@apache.org>
Date:   Mon Jul 23 18:31:07 2018 +1000

    SOLR-11990: NPE during class init

commit acbf4a69321e16cff11cc7cf0a1f076fd9ac0037
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Mon Jul 23 13:55:30 2018 +0530

    SOLR-11990: Added asserts on the nodes that should be selected by the add replica suggester

commit 4824933fd6eb7d1773acbff1a1a0c5e670226e0b
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Fri Jul 20 14:30:52 2018 +0530

    SOLR-11990: Added WITH_COLLECTION to global tags. Fixed implementation of addViolatingReplicas
and getSuggestions in the clause impl. Added more asserts in testWithCollectionSuggestions.

commit dbadb33211c190026e08d8e3ea587b6f8df8720b
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Fri Jul 20 13:44:36 2018 +0530

    SOLR-11990: Added support for comparing violations, generating suggestions and adding
violating replicas

commit ada1f17d5c93a4186260473e4822d2bee1da0e16
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Wed Jul 18 19:14:56 2018 +0530

    SOLR-11990: Fix mock node state provider in TestPolicy to use the right cluster state.
Added nocommits to ensure that we return the right suggestions for this feature.

commit ef2d61812e0d96eb2275b3411906d9de57ab835e
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Wed Jul 18 18:39:51 2018 +0530

    SOLR-11990: Add missing node in nodeValues configuration

commit 34841fc01fea4a9f1e6a9f64050e576f2247a72b
Author: Shalin Shekhar Mangar <shalin@apache.org>
Date:   Wed Jul 18 16:32:57 2018 +0530

    SOLR-11990: Make it possible to co-locate replicas of multiple collections together in
a node


> Make it possible to co-locate replicas of multiple collections together in a node
> ---------------------------------------------------------------------------------
>
>                 Key: SOLR-11990
>                 URL: https://issues.apache.org/jira/browse/SOLR-11990
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: AutoScaling, SolrCloud
>            Reporter: Shalin Shekhar Mangar
>            Assignee: Shalin Shekhar Mangar
>            Priority: Major
>             Fix For: master (8.0), 7.5
>
>         Attachments: SOLR-11990.patch, SOLR-11990.patch, SOLR-11990.patch, SOLR-11990.patch,
SOLR-11990.patch, SOLR-11990.patch, SOLR-11990.patch
>
>
> It is necessary to co-locate replicas of different collection together in a node when
cross-collection joins are performed.
> while creating a collection specify the parameter {{withCollection=other-collection-name}}
. This ensure that Solr always ensure that atleast one replica of {{other-collection}} is
present with this collection replicas
> This requires changing create collection, create shard and add replica APIs as well because
we want a replica of collection A to be created first before a replica of collection B is
created so that join queries etc are always possible.
> Some caveats to this implementation:
> # The {{other-collection}} should only have a single shard named "shard1"
> # Any replica of {{other-collection}} created by this feature will be of NRT type
> Removing the above caveats can be a goal of other issues.



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