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From "Noble Paul (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (SOLR-844) A SolrServer impl to front-end multiple urls
Date Sun, 30 Nov 2008 04:51:44 GMT

    [ https://issues.apache.org/jira/browse/SOLR-844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12651742#action_12651742
] 

noble.paul edited comment on SOLR-844 at 11/29/08 8:50 PM:
-----------------------------------------------------------

A simple round-robin based implementtaion. Keeps two lists of servers live and dead. If a
request to a server fails it is added to the list of dead servers.

Periodically (once in a minute) the dead servers are pinged to find if they are up again.
The ping is done in a thread which makes a normal request. A thread checks only one server

Needs another ConfigLBHttpSolrServer which can be driven from a config file (local/http)

      was (Author: noble.paul):
    A simple round-robin based implementtaion. Keeps two lists of servers live and dead. If
a request to a server fails it is added to the list of dead servers.

Periodically (one in a minute) the dead servers are pinged to find if they are up again. The
ping is done in a thread which makes a normal request. A thread checks only one server

Needs another ConfigLBHttpSolrServer which can be driven from a config file (local/http)
  
> A SolrServer impl to front-end multiple urls
> --------------------------------------------
>
>                 Key: SOLR-844
>                 URL: https://issues.apache.org/jira/browse/SOLR-844
>             Project: Solr
>          Issue Type: New Feature
>          Components: clients - java
>    Affects Versions: 1.3
>            Reporter: Noble Paul
>             Fix For: 1.4
>
>         Attachments: SOLR-844.patch, SOLR-844.patch
>
>
> Currently a {{CommonsHttpSolrServer}} can talk to only one server. This demands that
the user have a LoadBalancer or do the roundrobin on their own. We must have a {{LBHttpSolrServer}}
which must automatically do a Loadbalancing between multiple hosts. This can be backed by
the {{CommonsHttpSolrServer}}
> This can have the following other features
> * Automatic failover
> * Optionally take in  a file /url containing the the urls of servers so that the server
list can be automatically updated  by periodically loading the config
> * Support for adding removing servers during runtime
> * Pluggable Loadbalancing mechanism. (round-robin, weighted round-robin, random etc)
> * Pluggable Failover mechanisms

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