Re: question about search indexes and clusters

the search engine uses the clustering capacities of Jahia's cache system ( 
using JMS ) to propagate search indexation between all clustered Jahia 
servers.
So when a file upload occurs on a server that actually doesn't index files, 
the other clusters will ( as long as they are set to do so ).


Regards,
Khue Nguyen



----- Original Message ----- 
From: "Gilles Schlienger" <[email protected]>
To: <[email protected]>
Sent: Friday, January 14, 2005 9:18 PM
Subject: Re: question about search indexes and clusters


> Thanks Khue
>
> I understand what you mean,
> but what happens if a user is uploading a file using the server that does 
> not index files?
> Or, how do you force users to upload files using only one server?
> If the file is not indexed, you can't search it?
>
> Thanks
> Gilles
>
> --- Khue Nguyen <[email protected]> a écrit :
>> Hi,
>>
>>
>> by default each Jahia instance do index and search in a separate index 
>> file.
>> But you can configure each of them to :
>>
>> 1) only search but no perform indexation
>> 2) to use a common search index
>>
>> These settings are done in the web.xml file of each Jahia instance.
>>
>> <init-param>
>>  <param-name>org.apache.lucene.searchIndexRootDir</param-name>
>>   <!-- to point to a common search index ( but only one Jahia instance
>> should run indexation -->
>>  <param-value>/WEB-INF/var/search_indexes</param-value>
>> </init-param>
>>
>> <init-param>
>>  <param-name>org.apache.lucene.localIndexing</param-name>
>>  <param-value>1</param-value> <!-- 1: allow local indexing, 0: do not
>> index -->
>> </init-param>
>>
>> we've managed to refactor the search service in near future.
>>
>>
>> Regards,
>> Khue Nguyen
>>
>>
>>
>> ----- Original Message ----- 
>> From: "Gilles Schlienger" <[email protected]>
>> To: <[email protected]>
>> Sent: Friday, January 14, 2005 3:50 PM
>> Subject: question about search indexes and clusters
>>
>>
>> > Hi everyone,
>> >
>> > I'm currently setting up Jahia in a cluster environment with 2 Jahia
>> > servers.
>> >
>> > I need failover support in my architecture. Thus I need to have data
>> > duplicated on both servers.
>> > I'm thinking about implementing a mechanism to notify and synchronize 
>> > the
>> > other machine and vice
>> > versa, especially for the Jahia files (Big Text, PDFs etc...)
>> >
>> > But what about the search indexes?
>> > I'm a little nervous about synchronizing index files.
>> > I'm thinking about this scenario:
>> > Since indexing a file (PDF) can take some time, if user1 indexes a PDF 
>> > on
>> > server1 and user2
>> > idnexes a PDF on server2 almost at the same time, then index files 
>> > could
>> > be overriden one with the
>> > other during synchronisation.
>> >
>> > I've read the Jahia Clustering HowTo. They talk about only having one
>> > Jahia instance for indexing,
>> > ut how do you implement this? (do you configure with the Lucene config
>> > files ?)
>> >
>> > Thanks again for any help about clustering
>> > Gilles
>> >
>> >
>> >
>> >
>> >
>> >
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>>
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