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From "Eungsop Yoo (JIRA)" <>
Subject [jira] [Commented] (SOLR-9562) Minimize queried collections for time series alias
Date Thu, 06 Oct 2016 06:05:20 GMT


Eungsop Yoo commented on SOLR-9562:

I see. 

I found some articles related to this issue and read them.

On manual sharding, the client should do some work related to shard for indexing and querying.
But It seems this work can be moved to SolrCloud server from the client. So we can make new
time series router which does the works related to sharding for time series data. How do you
think about this approach?

> Minimize queried collections for time series alias
> --------------------------------------------------
>                 Key: SOLR-9562
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Eungsop Yoo
>            Priority: Minor
>         Attachments: SOLR-9562-v2.patch, SOLR-9562.patch
> For indexing time series data(such as large log data), we can create a new collection
regularly(hourly, daily, etc.) with a write alias and create a read alias for all of those
collections. But all of the collections of the read alias are queried even if we search over
very narrow time window. In this case, the docs to be queried may be stored in very small
portion of collections. So we don't need to do that.
> I suggest this patch for read alias to minimize queried collections. Three parameters
for CREATEALIAS action are added.
> || Key || Type || Required || Default || Description ||
> | timeField | string | No | | The time field name for time series data. It should be
date type. |
> | dateTimeFormat | string | No | | The format of timestamp for collection creation. Every
collection should has a suffix(start with "_") with this format. 
> Ex. dateTimeFormat: yyyyMMdd, collectionName: col_20160927
> See [DateTimeFormatter|].
> | timeZone | string | No | | The time zone information for dateTimeFormat parameter.
> Ex. GMT+9. 
> See [DateTimeFormatter|].
> And then when we query with filter query like this "timeField:\[fromTime TO toTime\]",
only the collections have the docs for a given time range will be queried.

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