lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Lucene/Solr QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-13257) Enable replica routing affinity for better cache usage
Date Tue, 09 Jul 2019 09:07:00 GMT

    [ https://issues.apache.org/jira/browse/SOLR-13257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16881072#comment-16881072
] 

Lucene/Solr QA commented on SOLR-13257:
---------------------------------------

| (/) *{color:green}+1 overall{color}* |
\\
\\
|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} test4tests {color} | {color:green}  0m  0s{color}
| {color:green} The patch appears to include 1 new or modified test files. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  2m 19s{color} |
{color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  2m 18s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  2m 18s{color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} Release audit (RAT) {color} | {color:green}  2m 
6s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} Check forbidden APIs {color} | {color:green}  1m
54s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} Validate source patterns {color} | {color:green}
 1m 54s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} Validate ref guide {color} | {color:green}  1m 54s{color}
| {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 31m 25s{color} | {color:green}
core in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  4m 55s{color} | {color:green}
solrj in the patch passed. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 44m 59s{color} | {color:black}
{color} |
\\
\\
|| Subsystem || Report/Notes ||
| JIRA Issue | SOLR-13257 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12973965/SOLR-13257.patch
|
| Optional Tests |  compile  javac  unit  ratsources  checkforbiddenapis  validatesourcepatterns
 validaterefguide  |
| uname | Linux lucene1-us-west 4.4.0-137-generic #163~14.04.1-Ubuntu SMP Mon Sep 24 17:14:57
UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | ant |
| Personality | /home/jenkins/jenkins-slave/workspace/PreCommit-SOLR-Build/sourcedir/dev-tools/test-patch/lucene-solr-yetus-personality.sh
|
| git revision | master / 0c09481 |
| ant | version: Apache Ant(TM) version 1.9.3 compiled on July 24 2018 |
| Default Java | LTS |
|  Test Results | https://builds.apache.org/job/PreCommit-SOLR-Build/484/testReport/ |
| modules | C: solr solr/core solr/solrj solr/solr-ref-guide U: solr |
| Console output | https://builds.apache.org/job/PreCommit-SOLR-Build/484/console |
| Powered by | Apache Yetus 0.7.0   http://yetus.apache.org |


This message was automatically generated.



> Enable replica routing affinity for better cache usage
> ------------------------------------------------------
>
>                 Key: SOLR-13257
>                 URL: https://issues.apache.org/jira/browse/SOLR-13257
>             Project: Solr
>          Issue Type: New Feature
>          Components: SolrCloud
>            Reporter: Michael Gibney
>            Priority: Minor
>         Attachments: AffinityShardHandlerFactory.java, SOLR-13257.patch, SOLR-13257.patch
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> For each shard in a distributed request, Solr currently routes each request randomly
via [ShufflingReplicaListTransformer|https://github.com/apache/lucene-solr/blob/master/solr/core/src/java/org/apache/solr/handler/component/ShufflingReplicaListTransformer.java]
to a particular replica. In setups with replication factor >1, this normally results in
a situation where subsequent requests (which one would hope/expect to leverage cached results
from previous related requests) end up getting routed to a replica that hasn't seen any related
requests.
> The problem can be replicated by issuing a relatively expensive query (maybe containing
common terms?). The first request initializes the {{queryResultCache}} on the consulted replicas.
If replication factor >1 and there are a sufficient number of shards, subsequent requests
will likely be routed to at least one replica that _hasn't_ seen the query before. The replicas
with uninitialized caches become a bottleneck, and from the client's perspective, many subsequent
requests appear not to benefit from caching at all.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org


Mime
View raw message