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https://issues.apache.org/jira/browse/SOLR-14319?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17510067#comment-17510067
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Richard Goodman commented on SOLR-14319:
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Hi [~epugh]
I've gotten round to updating the patch for this one, sorry for the delay, It's
been some time I've properly done some Solr work and have been given an
upgraded laptop at work and in the process of porting things over.
Anyway, back to the patch. I've slightly updated with the following;
- Added a check (and warning message, preventing the collection being created)
if the collection is only made up of pull replicas
- Instead of a drop down selection, allowed the user to specify the number of
each replicaType possible, for example 1 tlog replica, 2 pull replicas
I'll add a bunch of images to reflect this as well as the patch.
[^SOLR-14319-Replica-type-on-add-collection-UI.patch]
Attempting to create a collection with just pull replicas will result in an
error message, preventing you from creating the collection. Influence taken
from the solr documentation
[here|https://solr.apache.org/guide/8_11/collection-management.html#create-parameters];
{quote}This type is not eligible to become a leader and should not be the only
type of replicas in the collection.{quote}
!only-pulls.png!
What creating a collection with 2 way replicated tlog replicas (ignore the
error message, thats just from before)
!only-tlogs.png!
Creating a collection the normal way (advanced options are expanded for full
transparency)
!ordinary-approach.png!
For full completeness, I also tested what would happen if instead of using
{{replicationFactor}}, but instead specified 2 nrtReplicas
!specifying-nrt-replicas.png!
And finally, the end result of all of these operations
!end-result.png!
> Add ability to select replicatype to admin ui collection creation
> -----------------------------------------------------------------
>
> Key: SOLR-14319
> URL: https://issues.apache.org/jira/browse/SOLR-14319
> Project: Solr
> Issue Type: Improvement
> Components: Admin UI
> Affects Versions: 7.7.2
> Reporter: Richard Goodman
> Priority: Minor
> Attachments: SOLR-14319-Replica-type-on-add-collection-UI.patch,
> SOLR-14319.patch, Screenshot 2020-03-10 at 16.26.28.png, Screenshot
> 2020-03-10 at 16.33.52.png, end-result.png, only-pulls.png, only-tlogs.png,
> ordinary-approach.png, specifying-nrt-replicas.png
>
>
> This is just a small patch that allows you to select the replica type when
> creating a collection. I'm aware that a possible strategy for replica types
> of a collection can be {{'tlog + pull'}}, because of this, I'm open to
> feedback on a different way to display this feature. Currently I have a drop
> down box defining the types of replicas, with it defaulting to nrt, and it
> will take the replication factor specified and will that many replicas of a
> given type.
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