Tomás Fernández Löbbe created SOLR-7570:
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Summary: Config APIs should not modify the ConfigSet
Key: SOLR-7570
URL: https://issues.apache.org/jira/browse/SOLR-7570
Project: Solr
Issue Type: Improvement
Reporter: Tomás Fernández Löbbe
Originally discussed here:
http://mail-archives.apache.org/mod_mbox/lucene-dev/201505.mbox/%3CCAMJgJxSXCHxDzJs5-C-pKFDEBQD6JbgxB=-xp7u143ekmgp...@mail.gmail.com%3E
The ConfigSet used to create a collection should be read-only. Changes made via
any of the Config APIs should only be applied to the collection where the
operation is done and no to other collections that may be using the same
ConfigSet. As discussed in the dev list:
When a collection is created we should have two things, an immutable part (the
ConfigSet) and a mutable part (configoverlay, generated schema, etc). The
ConfigSet will still be placed in ZooKeeper under "/configs" but the mutable
part should be placed under "/collections/$COLLECTION_NAME/…"
[~romseygeek] suggested:
{quote}
A nice way of doing it would be to make it part of the SolrResourceLoader
interface. The ZK resource loader could check in the collection-specific
zknode first, and then under configs/, and we could add a writeResource()
method that writes to the collection-specific node as well. Then all config
I/O goes via the resource loader, and we have a way of keeping certain parts
immutable.
{quote}
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