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https://issues.apache.org/jira/browse/SOLR-5302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13969719#comment-13969719
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Steven Bower commented on SOLR-5302:
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If someone wants to do that work that's great.. I don't have plans to work on
multi-shard at the moment (this will change in the future) as I just don't have
a use-case for it... we will though.. If someone wants to pick it up I'd gladly
assist...
I understand the intention to have everything cloud compatible.. The reality is
that many components suffer from inconsistencies when in cloud mode (MLT, All
the join work being done and in Solr, FieldCollapsing, etc..) I think it should
be the intention to make things work in cloud mode however some use-case don't
really make sense in distributed mode when you look at the cost of the
implementation.. we can do analytics very quickly in solr with this component
but doing this as a map-reduce/distributed implementation may prove to be
prohibitively time consuming at query time and thus may not ever get used in
distributed configurations..
Anyway I'd like to see this get in prior to supporting multi-node as it will
probably be a long while before the infrastructure is in place to support it
(ie the map-reduce ticket)
> Analytics Component
> -------------------
>
> Key: SOLR-5302
> URL: https://issues.apache.org/jira/browse/SOLR-5302
> Project: Solr
> Issue Type: New Feature
> Reporter: Steven Bower
> Assignee: Erick Erickson
> Fix For: 5.0
>
> Attachments: SOLR-5302.patch, SOLR-5302.patch, SOLR-5302.patch,
> SOLR-5302.patch, Search Analytics Component.pdf, Statistical Expressions.pdf,
> solr_analytics-2013.10.04-2.patch
>
>
> This ticket is to track a "replacement" for the StatsComponent. The
> AnalyticsComponent supports the following features:
> * All functionality of StatsComponent (SOLR-4499)
> * Field Faceting (SOLR-3435)
> ** Support for limit
> ** Sorting (bucket name or any stat in the bucket
> ** Support for offset
> * Range Faceting
> ** Supports all options of standard range faceting
> * Query Faceting (SOLR-2925)
> * Ability to use overall/field facet statistics as input to range/query
> faceting (ie calc min/max date and then facet over that range
> * Support for more complex aggregate/mapping operations (SOLR-1622)
> ** Aggregations: min, max, sum, sum-of-square, count, missing, stddev, mean,
> median, percentiles
> ** Operations: negation, abs, add, multiply, divide, power, log, date math,
> string reversal, string concat
> ** Easily pluggable framework to add additional operations
> * New / cleaner output format
> Outstanding Issues:
> * Multi-value field support for stats (supported for faceting)
> * Multi-shard support (may not be possible for some operations, eg median)
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