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From "Sami Siren (Commented) (JIRA)" <>
Subject [jira] [Commented] (SOLR-3088) create shard placeholders
Date Wed, 08 Feb 2012 20:00:59 GMT


Sami Siren commented on SOLR-3088:

bq. and numShards as a collection property (rather than just a creation property) doesn't
make sense.

Yeah I agree. I just got confused when you mentioned (in the original issue text) that something
would have to be stored under /collections in zk.

So to summarize the scope of this issue once more:

Initiating the cluster/collection from the event of starting the first node:
The first node that joins the cluster will pass the desired slice count (numShards System
Property) and that number will be used to generate the placeholders (slices containing 0 shards)
for the specific collection in cloudstate.

After that everything works pretty much as it is now, with one exception: overseer does not
look at the system property for determining how many slices there should be but uses the slice
count (the placeholders in the beginning) from cloudstate.

> create shard placeholders
> -------------------------
>                 Key: SOLR-3088
>                 URL:
>             Project: Solr
>          Issue Type: New Feature
>          Components: SolrCloud
>            Reporter: Yonik Seeley
>             Fix For: 4.0
> When creating a new collection, a placeholder for each shard should be created.

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