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https://issues.apache.org/jira/browse/SOLR-6399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15394033#comment-15394033
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Yago Riveiro edited comment on SOLR-6399 at 7/26/16 4:24 PM:
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With a flag in the core.properties saying that the core is not loaded on
startup, a new state in zookeeper saying that collection is unloaded to not
route queries and not trigger recoveries or notify that collection is down, and
a command to load the collection on demand It's enough.
I don't want to do a backup with a restore, I want notify the cluster to not
load data to memory to save resources, but if necessary loading the collection
on the fly.
Backup data involve extra space somewhere, with 1T collection you needs 1T in
other location to backup, to say nothing of transfer data over the network ...
Backup and restore is a nice feature, but in huge clusters with a lot of data
you not always can do it without huge amount of resources.
was (Author: yriveiro):
With a flag in the core.properties saying that the core is not loaded on
startup, a new state in zookeeper saying that collection is unloaded to not
route queries and not trigger recoveries or notify that collection is down, and
a command to load the collection on demand It's enough.
I don't want to do a backup with a restore, I want notify the cluster to not
load data to memory to save resources, but if necessary loading the collection
on the fly.
Backup data involve extra space somewhere, with 1T collection you needs 1T in
other location to backup, to say nothing of transfer data over the network ...
> Implement unloadCollection in the Collections API
> -------------------------------------------------
>
> Key: SOLR-6399
> URL: https://issues.apache.org/jira/browse/SOLR-6399
> Project: Solr
> Issue Type: New Feature
> Reporter: dfdeshom
> Assignee: Shalin Shekhar Mangar
> Fix For: 6.0
>
>
> There is currently no way to unload a collection without deleting its
> contents. There should be a way in the collections API to unload a collection
> and reload it later, as needed.
> A use case for this is the following: you store logs by day, with each day
> having its own collection. You are required to store up to 2 years of data,
> which adds up to 730 collections. Most of the time, you'll want to have 3
> days of data loaded for search. Having just 3 collections loaded into memory,
> instead of 730 will make managing Solr easier.
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