[jira] [Commented] (SOLR-12845) Add a default cluster policy
[
https://issues.apache.org/jira/browse/SOLR-12845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17166316#comment-17166316
]
ASF subversion and git services commented on SOLR-12845:
Commit ffaeaf6382857f06e1421ab85394398a2ae6ad1b in lucene-solr's branch
refs/heads/branch_8x from Andrzej Bialecki
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=ffaeaf6 ]
Revert "SOLR-12845: Add a default autoscaling cluster policy."
This reverts commit 8e0eae260a0c38fa03e2eaf682d0db9d8b0b6374.
> Add a default cluster policy
>
>
> Key: SOLR-12845
> URL: https://issues.apache.org/jira/browse/SOLR-12845
> Project: Solr
> Issue Type: Improvement
> Components: AutoScaling
>Reporter: Shalin Shekhar Mangar
>Assignee: Andrzej Bialecki
>Priority: Major
> Fix For: 8.6
>
> Attachments: SOLR-12845.patch, SOLR-12845.patch, Screen Shot
> 2020-07-27 at 10.57.33 AM.png, Screenshot from 2020-07-18 21-07-34.png
>
>
> [~varunthacker] commented on SOLR-12739:
> bq. We should also ship with some default policies - "Don't allow more than
> one replica of a shard on the same JVM" , "Distribute cores across the
> cluster evenly" , "Distribute replicas per collection across the nodes"
> This issue is about adding these defaults. I propose the following as default
> cluster policy:
> {code}
> # Each shard cannot have more than one replica on the same node if possible
> {"replica": "<2", "shard": "#EACH", "node": "#ANY", "strict":false}
> # Each collections replicas should be equally distributed amongst nodes
> {"replica": "#EQUAL", "node": "#ANY", "strict":false}
> # All cores should be equally distributed amongst nodes
> {"cores": "#EQUAL", "node": "#ANY", "strict":false}
> {code}
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[jira] [Commented] (SOLR-12845) Add a default cluster policy
[
https://issues.apache.org/jira/browse/SOLR-12845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17165960#comment-17165960
]
ASF subversion and git services commented on SOLR-12845:
Commit 70b879b03022c38a9e230d024290a05c66d3e9c3 in lucene-solr's branch
refs/heads/branch_8_6 from Houston Putman
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=70b879b ]
SOLR-12845: Adding upgrade notes for the reversion of default autoscaling.
> Add a default cluster policy
>
>
> Key: SOLR-12845
> URL: https://issues.apache.org/jira/browse/SOLR-12845
> Project: Solr
> Issue Type: Improvement
> Components: AutoScaling
>Reporter: Shalin Shekhar Mangar
>Assignee: Andrzej Bialecki
>Priority: Major
> Fix For: 8.6
>
> Attachments: SOLR-12845.patch, SOLR-12845.patch, Screen Shot
> 2020-07-27 at 10.57.33 AM.png, Screenshot from 2020-07-18 21-07-34.png
>
>
> [~varunthacker] commented on SOLR-12739:
> bq. We should also ship with some default policies - "Don't allow more than
> one replica of a shard on the same JVM" , "Distribute cores across the
> cluster evenly" , "Distribute replicas per collection across the nodes"
> This issue is about adding these defaults. I propose the following as default
> cluster policy:
> {code}
> # Each shard cannot have more than one replica on the same node if possible
> {"replica": "<2", "shard": "#EACH", "node": "#ANY", "strict":false}
> # Each collections replicas should be equally distributed amongst nodes
> {"replica": "#EQUAL", "node": "#ANY", "strict":false}
> # All cores should be equally distributed amongst nodes
> {"cores": "#EQUAL", "node": "#ANY", "strict":false}
> {code}
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[jira] [Commented] (SOLR-12845) Add a default cluster policy
[
https://issues.apache.org/jira/browse/SOLR-12845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17165767#comment-17165767
]
ASF subversion and git services commented on SOLR-12845:
Commit 1a7ca4e2300538b1f577bfaf0e40ec55e48600a9 in lucene-solr's branch
refs/heads/branch_8_6 from Houston Putman
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=1a7ca4e ]
Revert "SOLR-12845: Properly clear default policy between tests."
To fix the regressions found in SOLR-14665.
This reverts commit 789c97be5fb66b61210cff9dafb89daabec9fe39.
> Add a default cluster policy
>
>
> Key: SOLR-12845
> URL: https://issues.apache.org/jira/browse/SOLR-12845
> Project: Solr
> Issue Type: Improvement
> Components: AutoScaling
>Reporter: Shalin Shekhar Mangar
>Assignee: Andrzej Bialecki
>Priority: Major
> Fix For: 8.6
>
> Attachments: SOLR-12845.patch, SOLR-12845.patch, Screen Shot
> 2020-07-27 at 10.57.33 AM.png, Screenshot from 2020-07-18 21-07-34.png
>
>
> [~varunthacker] commented on SOLR-12739:
> bq. We should also ship with some default policies - "Don't allow more than
> one replica of a shard on the same JVM" , "Distribute cores across the
> cluster evenly" , "Distribute replicas per collection across the nodes"
> This issue is about adding these defaults. I propose the following as default
> cluster policy:
> {code}
> # Each shard cannot have more than one replica on the same node if possible
> {"replica": "<2", "shard": "#EACH", "node": "#ANY", "strict":false}
> # Each collections replicas should be equally distributed amongst nodes
> {"replica": "#EQUAL", "node": "#ANY", "strict":false}
> # All cores should be equally distributed amongst nodes
> {"cores": "#EQUAL", "node": "#ANY", "strict":false}
> {code}
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[jira] [Commented] (SOLR-12845) Add a default cluster policy
[
https://issues.apache.org/jira/browse/SOLR-12845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17165769#comment-17165769
]
ASF subversion and git services commented on SOLR-12845:
Commit 7c8427907300256e7b3bcf6835e43986a712ffac in lucene-solr's branch
refs/heads/branch_8_6 from Houston Putman
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=7c84279 ]
Revert "SOLR-12845: Add a default autoscaling cluster policy."
To fix the regressions found in SOLR-14665.
This reverts commit 8e0eae260a0c38fa03e2eaf682d0db9d8b0b6374.
> Add a default cluster policy
>
>
> Key: SOLR-12845
> URL: https://issues.apache.org/jira/browse/SOLR-12845
> Project: Solr
> Issue Type: Improvement
> Components: AutoScaling
>Reporter: Shalin Shekhar Mangar
>Assignee: Andrzej Bialecki
>Priority: Major
> Fix For: 8.6
>
> Attachments: SOLR-12845.patch, SOLR-12845.patch, Screen Shot
> 2020-07-27 at 10.57.33 AM.png, Screenshot from 2020-07-18 21-07-34.png
>
>
> [~varunthacker] commented on SOLR-12739:
> bq. We should also ship with some default policies - "Don't allow more than
> one replica of a shard on the same JVM" , "Distribute cores across the
> cluster evenly" , "Distribute replicas per collection across the nodes"
> This issue is about adding these defaults. I propose the following as default
> cluster policy:
> {code}
> # Each shard cannot have more than one replica on the same node if possible
> {"replica": "<2", "shard": "#EACH", "node": "#ANY", "strict":false}
> # Each collections replicas should be equally distributed amongst nodes
> {"replica": "#EQUAL", "node": "#ANY", "strict":false}
> # All cores should be equally distributed amongst nodes
> {"cores": "#EQUAL", "node": "#ANY", "strict":false}
> {code}
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[jira] [Commented] (SOLR-12845) Add a default cluster policy
[
https://issues.apache.org/jira/browse/SOLR-12845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17165763#comment-17165763
]
Houston Putman commented on SOLR-12845:
---
Varun,
Here is my very crude attempt at plotting my results. Basically everything was
below a second, until it blew up at the end. Probably because it ran out of
resources.
!Screen Shot 2020-07-27 at 10.57.33 AM.png|width=400,height=324!
Andrzej, sounds good. I shall do the revert on branch_8_6 then.
> Add a default cluster policy
>
>
> Key: SOLR-12845
> URL: https://issues.apache.org/jira/browse/SOLR-12845
> Project: Solr
> Issue Type: Improvement
> Components: AutoScaling
>Reporter: Shalin Shekhar Mangar
>Assignee: Andrzej Bialecki
>Priority: Major
> Fix For: 8.6
>
> Attachments: SOLR-12845.patch, SOLR-12845.patch, Screen Shot
> 2020-07-27 at 10.57.33 AM.png, Screenshot from 2020-07-18 21-07-34.png
>
>
> [~varunthacker] commented on SOLR-12739:
> bq. We should also ship with some default policies - "Don't allow more than
> one replica of a shard on the same JVM" , "Distribute cores across the
> cluster evenly" , "Distribute replicas per collection across the nodes"
> This issue is about adding these defaults. I propose the following as default
> cluster policy:
> {code}
> # Each shard cannot have more than one replica on the same node if possible
> {"replica": "<2", "shard": "#EACH", "node": "#ANY", "strict":false}
> # Each collections replicas should be equally distributed amongst nodes
> {"replica": "#EQUAL", "node": "#ANY", "strict":false}
> # All cores should be equally distributed amongst nodes
> {"cores": "#EQUAL", "node": "#ANY", "strict":false}
> {code}
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[jira] [Commented] (SOLR-12845) Add a default cluster policy
[
https://issues.apache.org/jira/browse/SOLR-12845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17165603#comment-17165603
]
Andrzej Bialecki commented on SOLR-12845:
-
(back from vacation, sorry for the radio silence). I'm sorry for this mess.
Yes, this should be reverted from branch_8x and branch_8_6.
> Add a default cluster policy
>
>
> Key: SOLR-12845
> URL: https://issues.apache.org/jira/browse/SOLR-12845
> Project: Solr
> Issue Type: Improvement
> Components: AutoScaling
>Reporter: Shalin Shekhar Mangar
>Assignee: Andrzej Bialecki
>Priority: Major
> Fix For: 8.6
>
> Attachments: SOLR-12845.patch, SOLR-12845.patch, Screenshot from
> 2020-07-18 21-07-34.png
>
>
> [~varunthacker] commented on SOLR-12739:
> bq. We should also ship with some default policies - "Don't allow more than
> one replica of a shard on the same JVM" , "Distribute cores across the
> cluster evenly" , "Distribute replicas per collection across the nodes"
> This issue is about adding these defaults. I propose the following as default
> cluster policy:
> {code}
> # Each shard cannot have more than one replica on the same node if possible
> {"replica": "<2", "shard": "#EACH", "node": "#ANY", "strict":false}
> # Each collections replicas should be equally distributed amongst nodes
> {"replica": "#EQUAL", "node": "#ANY", "strict":false}
> # All cores should be equally distributed amongst nodes
> {"cores": "#EQUAL", "node": "#ANY", "strict":false}
> {code}
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[jira] [Commented] (SOLR-12845) Add a default cluster policy
[
https://issues.apache.org/jira/browse/SOLR-12845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17165144#comment-17165144
]
Varun Thacker commented on SOLR-12845:
--
Hi Houston,
Can you post the results of the test you ran with Ishan's script ? Like AB
mentioned on Slack, why was master faster below 80 collections . Wondering if
you also got similar results.
> Have we agreed to revert this commit on 8_6 and 8x?
AB also mentioned that we should remove these rules. I agree with that given
the fact that the autoscaling framework is going away ( SOLR-14656 )
> Add a default cluster policy
>
>
> Key: SOLR-12845
> URL: https://issues.apache.org/jira/browse/SOLR-12845
> Project: Solr
> Issue Type: Improvement
> Components: AutoScaling
>Reporter: Shalin Shekhar Mangar
>Assignee: Andrzej Bialecki
>Priority: Major
> Fix For: 8.6
>
> Attachments: SOLR-12845.patch, SOLR-12845.patch, Screenshot from
> 2020-07-18 21-07-34.png
>
>
> [~varunthacker] commented on SOLR-12739:
> bq. We should also ship with some default policies - "Don't allow more than
> one replica of a shard on the same JVM" , "Distribute cores across the
> cluster evenly" , "Distribute replicas per collection across the nodes"
> This issue is about adding these defaults. I propose the following as default
> cluster policy:
> {code}
> # Each shard cannot have more than one replica on the same node if possible
> {"replica": "<2", "shard": "#EACH", "node": "#ANY", "strict":false}
> # Each collections replicas should be equally distributed amongst nodes
> {"replica": "#EQUAL", "node": "#ANY", "strict":false}
> # All cores should be equally distributed amongst nodes
> {"cores": "#EQUAL", "node": "#ANY", "strict":false}
> {code}
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[jira] [Commented] (SOLR-12845) Add a default cluster policy
[
https://issues.apache.org/jira/browse/SOLR-12845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17163610#comment-17163610
]
Houston Putman commented on SOLR-12845:
---
Have we agreed to revert this commit on 8_6 and 8x? (I'm assuming master isn't
needed seeing that autoscaling has been removed.) I'm ready to push I just want
to make sure there is consensus.
I have also run your script [~ichattopadhyaya] and it looks like the linear
increase in response time is gone, it's generally stable.
> Add a default cluster policy
>
>
> Key: SOLR-12845
> URL: https://issues.apache.org/jira/browse/SOLR-12845
> Project: Solr
> Issue Type: Improvement
> Components: AutoScaling
>Reporter: Shalin Shekhar Mangar
>Assignee: Andrzej Bialecki
>Priority: Major
> Fix For: 8.6
>
> Attachments: SOLR-12845.patch, SOLR-12845.patch, Screenshot from
> 2020-07-18 21-07-34.png
>
>
> [~varunthacker] commented on SOLR-12739:
> bq. We should also ship with some default policies - "Don't allow more than
> one replica of a shard on the same JVM" , "Distribute cores across the
> cluster evenly" , "Distribute replicas per collection across the nodes"
> This issue is about adding these defaults. I propose the following as default
> cluster policy:
> {code}
> # Each shard cannot have more than one replica on the same node if possible
> {"replica": "<2", "shard": "#EACH", "node": "#ANY", "strict":false}
> # Each collections replicas should be equally distributed amongst nodes
> {"replica": "#EQUAL", "node": "#ANY", "strict":false}
> # All cores should be equally distributed amongst nodes
> {"cores": "#EQUAL", "node": "#ANY", "strict":false}
> {code}
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[jira] [Commented] (SOLR-12845) Add a default cluster policy
[
https://issues.apache.org/jira/browse/SOLR-12845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17160475#comment-17160475
]
Ishan Chattopadhyaya commented on SOLR-12845:
-
I published the methodology for running these numbers here:
https://issues.apache.org/jira/browse/SOLR-14656?focusedCommentId=17160311=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-17160311
> Add a default cluster policy
>
>
> Key: SOLR-12845
> URL: https://issues.apache.org/jira/browse/SOLR-12845
> Project: Solr
> Issue Type: Improvement
> Components: AutoScaling
>Reporter: Shalin Shekhar Mangar
>Assignee: Andrzej Bialecki
>Priority: Major
> Fix For: 8.6
>
> Attachments: SOLR-12845.patch, SOLR-12845.patch, Screenshot from
> 2020-07-18 21-07-34.png
>
>
> [~varunthacker] commented on SOLR-12739:
> bq. We should also ship with some default policies - "Don't allow more than
> one replica of a shard on the same JVM" , "Distribute cores across the
> cluster evenly" , "Distribute replicas per collection across the nodes"
> This issue is about adding these defaults. I propose the following as default
> cluster policy:
> {code}
> # Each shard cannot have more than one replica on the same node if possible
> {"replica": "<2", "shard": "#EACH", "node": "#ANY", "strict":false}
> # Each collections replicas should be equally distributed amongst nodes
> {"replica": "#EQUAL", "node": "#ANY", "strict":false}
> # All cores should be equally distributed amongst nodes
> {"cores": "#EQUAL", "node": "#ANY", "strict":false}
> {code}
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[jira] [Commented] (SOLR-12845) Add a default cluster policy
[
https://issues.apache.org/jira/browse/SOLR-12845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17160450#comment-17160450
]
Ishan Chattopadhyaya commented on SOLR-12845:
-
This commit introduced a massive regression in collection creation times.
Please see the graph below and consider blue (current master) vs yellow line
(master before this commit).
!Screenshot from 2020-07-18 21-07-34.png!
We have known for long that autoscaling framework is extremely inefficient.
What was the need for committing this issue and forcing users to endure more
agony by default? Also, there was no discussion around reviving this old issue,
no warning before committing this, no pull request (against latest master). And
worse, there was no performance testing done before merging this.
Given this slowdown, I suggest that we revert this change immediately, release
a breakfix 8.6.1 and apologize to our users for this oversight (unless it is an
intentional change).
[~ab], any thoughts please?
> Add a default cluster policy
>
>
> Key: SOLR-12845
> URL: https://issues.apache.org/jira/browse/SOLR-12845
> Project: Solr
> Issue Type: Improvement
> Components: AutoScaling
>Reporter: Shalin Shekhar Mangar
>Assignee: Andrzej Bialecki
>Priority: Major
> Fix For: 8.6
>
> Attachments: SOLR-12845.patch, SOLR-12845.patch, Screenshot from
> 2020-07-18 21-07-34.png
>
>
> [~varunthacker] commented on SOLR-12739:
> bq. We should also ship with some default policies - "Don't allow more than
> one replica of a shard on the same JVM" , "Distribute cores across the
> cluster evenly" , "Distribute replicas per collection across the nodes"
> This issue is about adding these defaults. I propose the following as default
> cluster policy:
> {code}
> # Each shard cannot have more than one replica on the same node if possible
> {"replica": "<2", "shard": "#EACH", "node": "#ANY", "strict":false}
> # Each collections replicas should be equally distributed amongst nodes
> {"replica": "#EQUAL", "node": "#ANY", "strict":false}
> # All cores should be equally distributed amongst nodes
> {"cores": "#EQUAL", "node": "#ANY", "strict":false}
> {code}
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[jira] [Commented] (SOLR-12845) Add a default cluster policy
[
https://issues.apache.org/jira/browse/SOLR-12845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17090488#comment-17090488
]
ASF subversion and git services commented on SOLR-12845:
Commit 789c97be5fb66b61210cff9dafb89daabec9fe39 in lucene-solr's branch
refs/heads/branch_8x from Andrzej Bialecki
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=789c97b ]
SOLR-12845: Properly clear default policy between tests.
> Add a default cluster policy
>
>
> Key: SOLR-12845
> URL: https://issues.apache.org/jira/browse/SOLR-12845
> Project: Solr
> Issue Type: Improvement
> Components: AutoScaling
>Reporter: Shalin Shekhar Mangar
>Assignee: Andrzej Bialecki
>Priority: Major
> Fix For: 8.6
>
> Attachments: SOLR-12845.patch, SOLR-12845.patch
>
>
> [~varunthacker] commented on SOLR-12739:
> bq. We should also ship with some default policies - "Don't allow more than
> one replica of a shard on the same JVM" , "Distribute cores across the
> cluster evenly" , "Distribute replicas per collection across the nodes"
> This issue is about adding these defaults. I propose the following as default
> cluster policy:
> {code}
> # Each shard cannot have more than one replica on the same node if possible
> {"replica": "<2", "shard": "#EACH", "node": "#ANY", "strict":false}
> # Each collections replicas should be equally distributed amongst nodes
> {"replica": "#EQUAL", "node": "#ANY", "strict":false}
> # All cores should be equally distributed amongst nodes
> {"cores": "#EQUAL", "node": "#ANY", "strict":false}
> {code}
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[jira] [Commented] (SOLR-12845) Add a default cluster policy
[
https://issues.apache.org/jira/browse/SOLR-12845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17090486#comment-17090486
]
ASF subversion and git services commented on SOLR-12845:
Commit 2a7ba5a48e065a5bb064a9c62562e73a0c3fb62e in lucene-solr's branch
refs/heads/master from Andrzej Bialecki
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=2a7ba5a ]
SOLR-12845: Properly clear default policy between tests.
> Add a default cluster policy
>
>
> Key: SOLR-12845
> URL: https://issues.apache.org/jira/browse/SOLR-12845
> Project: Solr
> Issue Type: Improvement
> Components: AutoScaling
>Reporter: Shalin Shekhar Mangar
>Assignee: Andrzej Bialecki
>Priority: Major
> Fix For: 8.6
>
> Attachments: SOLR-12845.patch, SOLR-12845.patch
>
>
> [~varunthacker] commented on SOLR-12739:
> bq. We should also ship with some default policies - "Don't allow more than
> one replica of a shard on the same JVM" , "Distribute cores across the
> cluster evenly" , "Distribute replicas per collection across the nodes"
> This issue is about adding these defaults. I propose the following as default
> cluster policy:
> {code}
> # Each shard cannot have more than one replica on the same node if possible
> {"replica": "<2", "shard": "#EACH", "node": "#ANY", "strict":false}
> # Each collections replicas should be equally distributed amongst nodes
> {"replica": "#EQUAL", "node": "#ANY", "strict":false}
> # All cores should be equally distributed amongst nodes
> {"cores": "#EQUAL", "node": "#ANY", "strict":false}
> {code}
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[jira] [Commented] (SOLR-12845) Add a default cluster policy
[
https://issues.apache.org/jira/browse/SOLR-12845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17089800#comment-17089800
]
ASF subversion and git services commented on SOLR-12845:
Commit 8e0eae260a0c38fa03e2eaf682d0db9d8b0b6374 in lucene-solr's branch
refs/heads/branch_8x from Andrzej Bialecki
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=8e0eae2 ]
SOLR-12845: Add a default autoscaling cluster policy.
> Add a default cluster policy
>
>
> Key: SOLR-12845
> URL: https://issues.apache.org/jira/browse/SOLR-12845
> Project: Solr
> Issue Type: Improvement
> Components: AutoScaling
>Reporter: Shalin Shekhar Mangar
>Assignee: Andrzej Bialecki
>Priority: Major
> Fix For: 8.6
>
> Attachments: SOLR-12845.patch, SOLR-12845.patch
>
>
> [~varunthacker] commented on SOLR-12739:
> bq. We should also ship with some default policies - "Don't allow more than
> one replica of a shard on the same JVM" , "Distribute cores across the
> cluster evenly" , "Distribute replicas per collection across the nodes"
> This issue is about adding these defaults. I propose the following as default
> cluster policy:
> {code}
> # Each shard cannot have more than one replica on the same node if possible
> {"replica": "<2", "shard": "#EACH", "node": "#ANY", "strict":false}
> # Each collections replicas should be equally distributed amongst nodes
> {"replica": "#EQUAL", "node": "#ANY", "strict":false}
> # All cores should be equally distributed amongst nodes
> {"cores": "#EQUAL", "node": "#ANY", "strict":false}
> {code}
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[jira] [Commented] (SOLR-12845) Add a default cluster policy
[
https://issues.apache.org/jira/browse/SOLR-12845?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17089801#comment-17089801
]
ASF subversion and git services commented on SOLR-12845:
Commit 5d60ff461371a721d020962976da8ffcaabab6a9 in lucene-solr's branch
refs/heads/master from Andrzej Bialecki
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=5d60ff4 ]
SOLR-12845: Add a default autoscaling cluster policy.
> Add a default cluster policy
>
>
> Key: SOLR-12845
> URL: https://issues.apache.org/jira/browse/SOLR-12845
> Project: Solr
> Issue Type: Improvement
> Components: AutoScaling
>Reporter: Shalin Shekhar Mangar
>Assignee: Andrzej Bialecki
>Priority: Major
> Fix For: 8.6
>
> Attachments: SOLR-12845.patch, SOLR-12845.patch
>
>
> [~varunthacker] commented on SOLR-12739:
> bq. We should also ship with some default policies - "Don't allow more than
> one replica of a shard on the same JVM" , "Distribute cores across the
> cluster evenly" , "Distribute replicas per collection across the nodes"
> This issue is about adding these defaults. I propose the following as default
> cluster policy:
> {code}
> # Each shard cannot have more than one replica on the same node if possible
> {"replica": "<2", "shard": "#EACH", "node": "#ANY", "strict":false}
> # Each collections replicas should be equally distributed amongst nodes
> {"replica": "#EQUAL", "node": "#ANY", "strict":false}
> # All cores should be equally distributed amongst nodes
> {"cores": "#EQUAL", "node": "#ANY", "strict":false}
> {code}
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