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https://issues.apache.org/jira/browse/SOLR-11250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16148527#comment-16148527
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Yuki Yano commented on SOLR-11250:
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[~shalinmangar]
Hmm, I need to clear my head. Summarizing the exchange about this issue and
also SOLR-11049, my understanding is as belows:
1. Accessing external resources like {{http}} or {{ftp}} is prohibitted due to
security issues.
2. We can access local resources by {{SolrResourceLoader}} if resources are
located in {{instanceDir}} i.e., {{ ${solr.solr.home} }} except
{{solr.allow.unsafe.resourceloading}} is true.
3. If we need to share resources in SolrCloud, using blob store is recommended.
By these reasons, if I want to add the model with external resources, I should
implement following two models:
1. The model which loads external resources by using {{SolrResourceLoader}}
(for standalone mode).
2. The model which loads external resources from {{BlobRepository}} (for
SolrCloud mode).
Is my understanding correct?
> Add new LTR model which loads the model definition from the external resource
> -----------------------------------------------------------------------------
>
> Key: SOLR-11250
> URL: https://issues.apache.org/jira/browse/SOLR-11250
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: contrib - LTR
> Reporter: Yuki Yano
> Priority: Minor
> Attachments: SOLR-11250_master.patch, SOLR-11250_master_v2.patch,
> SOLR-11250_master_v3.patch, SOLR-11250.patch
>
>
> We add new model which contains only the location of the external model and
> loads it during the initialization.
> By this procedure, large models which are difficult to upload to ZooKeeper
> can be available.
> The new model works as the wrapper of existing models, and deligates APIs to
> them.
> We add two classes by this patch:
> * {{ExternalModel}} : a base class for models with external resources.
> * {{URIExternalModel}} : an implementation of {{ExternalModel}} which loads
> the external model from specified URI (ex. file:, http:, etc.).
> For example, if you have a model on the local disk
> "file:///var/models/myModel.json", the definition of {{URIExternalModel}}
> will be like the following.
> {code}
> {
> "class" : "org.apache.solr.ltr.model.URIExternalModel",
> "name" : "myURIExternalModel",
> "features" : [],
> "params" : {
> "uri" : "file:///var/models/myModel.json"
> }
> }
> {code}
> If you use LTR with {{model=myURIExternalModel}}, the model of
> {{myModel.json}} will be used for scoring documents.
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