[jira] [Commented] (SOLR-11722) API to create a Time Routed Alias and first collection

["David Smiley (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-11722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16307495#comment-16307495 ] 

David Smiley commented on SOLR-11722:
-------------------------------------

RE V2/V1, the "properties" mechanism looks promising.  I think it's totally fine to have _introspect not expose the collection creation particulars of time routed alias. We can add docs to help users knows some do's and don'ts.

Yeah naming stuff is hard.  I'm good with "collection-create"; it's not bad.

RE alias routing, I think it's a dead-end to try to invent names similar to "router" but not use "router" simply because shards have a router using the name "router". This is the same concept, but we are applying it to this new "routed alias" thing as opposed to shards.  And we have a new type/name expressly for time routing.  If some new thing comes along in Solr that might be routed (which I admit seems unlikely), it might then also try to avoid using the "route" word... hence it feels wrong to try to have them use separate words.  It's the same concept.  But since the location of use is different that gives context, I think it's fine to use the same parameters as there isn't ambiguity.  Here we're adding alias metadata parameters, and so it applies to the alias.  In collection creation, the router is name-spaced in the context of _that_.  Hence I propose we use these metadata fields: router.name=time, router.field=myTimestampField, router.interval=+1DAY, and it's debatable if TZ is router.TZ or just TZ.  "start" isn't metadata, it's a param of this command that isn't used after.

> API to create a Time Routed Alias and first collection
> ------------------------------------------------------
>
>                 Key: SOLR-11722
>                 URL: https://issues.apache.org/jira/browse/SOLR-11722
>             Project: Solr
>          Issue Type: Sub-task
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: SolrCloud
>            Reporter: David Smiley
>         Attachments: SOLR-11722.patch
>
>
> This issue is about creating a single API command to create a "Time Routed Alias" along with its first collection.  Need to decide what endpoint URL it is and parameters.
> Perhaps in v2 it'd be {{/api/collections?command=create-routed-alias}} or alternatively piggy-back off of command=create-alias but we add more options, perhaps with a prefix like "router"?
> Inputs:
> * alias name
> * misc collection creation metadata (e.g. config, numShards, ...) perhaps in this context with a prefix like "collection."
> * metadata for TimeRoutedAliasUpdateProcessor, currently: router.field
> * date specifier for first collection; can include "date math".
> We'll certainly add more options as future features unfold.
> I believe the collection needs to be created first (referring to the alias name via a core property), and then the alias pointing to it which demands collections exist first.  When figuring the collection name, you'll need to reference the format in TimeRoutedAliasUpdateProcessor.



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