lucene-solr-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Li Li <>
Subject Re: a bug of solr distributed search
Date Mon, 26 Jul 2010 02:28:11 GMT
the solr version I used is 1.4

2010/7/26 Li Li <>:
> where is the link of this patch?
> 2010/7/24 Yonik Seeley <>:
>> On Fri, Jul 23, 2010 at 2:23 PM, MitchK <> wrote:
>>> why do we do not send the output of TermsComponent of every node in the
>>> cluster to a Hadoop instance?
>>> Since TermsComponent does the map-part of the map-reduce concept, Hadoop
>>> only needs to reduce the stuff. Maybe we even do not need Hadoop for this.
>>> After reducing, every node in the cluster gets the current values to compute
>>> the idf.
>>> We can store this information in a HashMap-based SolrCache (or something
>>> like that) to provide constant-time access. To keep the values up to date,
>>> we can repeat that after every x minutes.
>> There's already a patch in JIRA that does distributed IDF.
>> Hadoop wouldn't be the right tool for that anyway... it's for batch
>> oriented systems, not low-latency queries.
>>> If we got that, it does not care whereas we use doc_X from shard_A or
>>> shard_B, since they will all have got the same scores.
>> That only works if the docs are exactly the same - they may not be.
>> -Yonik

View raw message