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Posted to dev@lucene.apache.org by "Mark Miller (JIRA)" <ji...@apache.org> on 2014/01/06 19:43:57 UTC
[jira] [Comment Edited] (SOLR-5609) Don't let cores create
slices/named replicas
[ https://issues.apache.org/jira/browse/SOLR-5609?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13863216#comment-13863216 ]
Mark Miller edited comment on SOLR-5609 at 1/6/14 6:43 PM:
-----------------------------------------------------------
I don't really like this design.
I think the mode that tries to make ZK the truth should end up being the standard mode. We don't want some confusing param for this that looks like an option and controls just how cores register.
We want something like one option that will become the new default - something name like "legacyCloudMode".
We could start putting it in as legacyCloudMode=false when we want to default to it. Eventually we would remove the legacy mode in a major release most likely. We can't afford to support it long term IMO.
Having legacyCloudMode (or whatever it's named) = false should allow the cluster to disable the ability for cores to create collections or remove them and turn on the features that let the cluster use zk as the truth.
Then we can have further options for more advanced cluster behavior.
Making ZK the truth should be the default mode when you are not using our legacy mode though.
was (Author: markrmiller@gmail.com):
I don't really like this design.
I think the mode that tries to make ZK the truth should end up being the standard mode. We don't want some confusing param for this that looks like a option and controls just how cores register.
We want something like one options that will become the new default - something name like "legacyCloudMode".
We could start putting it in as legacyCloudMode=false when we want to default to it. Eventually we would remove the legacy mode in a major release most likely. We can't afford to support it long term IMO.
Having legacyCloudMode (or whatever it's named) = false should allow the cluster should disable the ability for cores to create collections or remove them and turn on the features that let the cluster use zk as the truth.
Then we can have further options for more advanced cluster behavior.
Making ZK the truth should be the default mode when you are not using our legacy mode though.
> Don't let cores create slices/named replicas
> --------------------------------------------
>
> Key: SOLR-5609
> URL: https://issues.apache.org/jira/browse/SOLR-5609
> Project: Solr
> Issue Type: Sub-task
> Components: SolrCloud
> Reporter: Noble Paul
> Fix For: 5.0, 4.7
>
>
> In SolrCloud, it is possible for a core to come up in any node , and register itself with an arbitrary slice/coreNodeName. This is a legacy requirement and we would like to make it only possible for Overseer to initiate creation of slice/replicas
> We plan to introduce cluster level properties at the top level
> /cluster-props.json
> {code:javascript}
> {
> "noSliceOrReplicaByCores":true"
> }
> {code}
> If this property is set to true, cores won't be able to send STATE commands with unknown slice/coreNodeName . Those commands will fail at Overseer. This is useful for SOLR-5310 / SOLR-5311 where a core/replica is deleted by a command and it comes up later and tries to create a replica/slice
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