Re: How to share Schema between multicore on Solr 4.4
Shawn: Hmmm, I hadn't thought about that before. The shareSchema stuff is keyed off the absolute directory (and timestamp) of the schema.xml file associated with a core and is about sharing the internal object that holds the parsed schema. Do you know for sure if the fact that this is coming from ZK actually shares the schema object? 'Cause I've never looked to see and it would be a good thing to have in my head... Thanks! Erick On Tue, Oct 8, 2013 at 8:33 PM, Shawn Heisey s...@elyograg.org wrote: On 10/7/2013 6:02 AM, Dharmendra Jaiswal wrote: I am using Solr 4.4 version with SolrCloud on Windows machine. Somehow i am not able to share schema between multiple core. If you're in SolrCloud mode, then you already *are* sharing your schema. You are also sharing your configuration. Both of them are in zookeeper. All collections (and all shards within a collection) which use a given config name are using the same copy. Any copies of your config/schema that might be on your disk are *NOT* being used. If you are starting Solr with any bootstrap options, then the config set that is in zookeeper might be getting overwritten by whats on your disk when Solr restarts, but otherwise SolrCloud *only* uses zookeeper for config/schema. The bootstrap options are meant to be used once, and I actually prefer to get SolrCloud operational without using bootstrap options at all. Thanks, Shawn
Re: How to share Schema between multicore on Solr 4.4
On 10/9/2013 6:24 AM, Erick Erickson wrote: Hmmm, I hadn't thought about that before. The shareSchema stuff is keyed off the absolute directory (and timestamp) of the schema.xml file associated with a core and is about sharing the internal object that holds the parsed schema. Do you know for sure if the fact that this is coming from ZK actually shares the schema object? 'Cause I've never looked to see and it would be a good thing to have in my head... With SolrCloud, I have no idea whether the actual internal objects are shared. Just now I tried to figure that out from the code, but I don't already have an understanding of how that code works, and a quick glance isn't enough to gain that knowledge.I can guarantee that you have a much deeper understanding of those internals than I do! My comments were to indicate that SolrCloud creates a situation where the config/schema are shared in the sense that there's only one canonical copy. Thanks, Shawn
Re: How to share Schema between multicore on Solr 4.4
bq: ...in the sense that there's only one canonical copy. Agreed, and as you say that copy is kept in ZooKeeper. And I pretty much guarantee that the internal solrconfig object is NOT shared. I doubt the schema object is shared, but it seems like it could be with some work. But the savings potential here is rather small unless you have a large number of cores. The LotsOfCores option is really, at this point, orthogonal to SolrCloud, I don't think (and we have some anecdotal evidence) that they don't play nice together Erick On Wed, Oct 9, 2013 at 12:17 PM, Shawn Heisey s...@elyograg.org wrote: On 10/9/2013 6:24 AM, Erick Erickson wrote: Hmmm, I hadn't thought about that before. The shareSchema stuff is keyed off the absolute directory (and timestamp) of the schema.xml file associated with a core and is about sharing the internal object that holds the parsed schema. Do you know for sure if the fact that this is coming from ZK actually shares the schema object? 'Cause I've never looked to see and it would be a good thing to have in my head... With SolrCloud, I have no idea whether the actual internal objects are shared. Just now I tried to figure that out from the code, but I don't already have an understanding of how that code works, and a quick glance isn't enough to gain that knowledge.I can guarantee that you have a much deeper understanding of those internals than I do! My comments were to indicate that SolrCloud creates a situation where the config/schema are shared in the sense that there's only one canonical copy. Thanks, Shawn
Re: How to share Schema between multicore on Solr 4.4
On 10/7/2013 6:02 AM, Dharmendra Jaiswal wrote: I am using Solr 4.4 version with SolrCloud on Windows machine. Somehow i am not able to share schema between multiple core. If you're in SolrCloud mode, then you already *are* sharing your schema. You are also sharing your configuration. Both of them are in zookeeper. All collections (and all shards within a collection) which use a given config name are using the same copy. Any copies of your config/schema that might be on your disk are *NOT* being used. If you are starting Solr with any bootstrap options, then the config set that is in zookeeper might be getting overwritten by whats on your disk when Solr restarts, but otherwise SolrCloud *only* uses zookeeper for config/schema. The bootstrap options are meant to be used once, and I actually prefer to get SolrCloud operational without using bootstrap options at all. Thanks, Shawn
How to share Schema between multicore on Solr 4.4
I am using Solr 4.4 version with SolrCloud on Windows machine.
Somehow i am not able to share schema between multiple core.
My solr.xml file look like:-
solr
str name=shareSchema${shareSchema:true}/str
solrcloud
str name=hostContext${hostContext:SolrEngine}/str
int name=hostPort${tomcat.port:8080}/int
int name=zkClientTimeout${zkClientTimeout:15000}/int
/solrcloud
I have used core.properties file for each core. One of the core (say
collection1) contains schema.xml file and rest will having all the config
file excluding schema.xml.
core.properties file contains
name=corename
After deployment
I am getting following error
collection2:
org.apache.solr.common.SolrException:org.apache.solr.common.SolrException:
Error loading schema resource schema.xml
Please note that i have provided shareSchema=true in solr.xml file.
Please let me know if anything is missing.
Any pointer will be helpful.
Thanks,
Dharmendra Jaiswal
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