There are a few things going on here that caused this, all resolved in 4.2 as 
far as I know. 

- Mark

On Mar 22, 2013, at 3:56 AM, bradhill99 <bradhil...@yahoo.com> wrote:

> Hi,
> I use solrcloud 4.1. 
> I start up two solr nodes A and B and then created a new collection using
> CoreAdmin to A using one shard, so Node A is leader. 
> Then I index some docs to it. Then I created the same collection using
> CoreAdmin to B to become a replica. I found that solr will sync all index
> files from A to B. 
> Under B's data dir, I have: index.20130318083415358 folder which has all
> the synced index files, index.properties, replication.properties and tlog
> folder(empty inside). 
> Then I removed the collection from node B using CoreAdmin UNLOAD, I keep
> all files in B's data dir, I didn't delete them. 
> Then I create the same collection from B again. I found that solr will sync
> files from A to B AGAIN!!! 
> And there is another folder index.20130318084514166 been created under B's
> data folder. 
> Actually I didn't index any docs to A after I UNLOAD collection on B. 
> So I wonder how to let solr know that B already has the correct index files
> and not to do the sync again?
> 
> 
> 
> --
> View this message in context: 
> http://lucene.472066.n3.nabble.com/Solr-4-2-replcation-whole-index-files-mechanism-tp4049980.html
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