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Apache Zookeeper: Distributing Nodes Through Datacenters

I am working on a new SolrCloud infrastructure - ZooKeeper.

Some background information:

  • all other services (mainly website infrastructure) are distributed between two data centers , with active configurations.
  • at the network level, servers are configured for extended LANS, with dark fiber through data centers. Thus, latency is minimal.
  • Most of these applications will use the SolrCloud infrastructure - ZooKeeper.

I got Solr Cloud and the ZooKeeper ensemble. The implementation at this level is fine.

But I am wondering how to distribute my ZooKeeper servers. I should have an odd number of servers, but I only have 2 data centers. If someone fails, I have a 50-50 chance that I will lose most.

Any ideas? So far I have been thinking:

  • a third data center request (unlikely to happen, $$$!)

  • host 2 to the data center and 1 to the external cloud provider (Amazon or ...?). Again $$$

  • set an odd number in data center 1 and use an observer on site 2. What happens if site 1 fails? Can SolrCloud work with only one observer?

Thanks for any idea and comments.

Nick

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2 answers

Once upon a time, but still, let me share what I did.

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3 DC, , , . ZK.

SOLR DC. 3- ZK . , DC. SOLR , , .

4 , 1 . , DC.

0

, ( ), cross dc zk. Cross-dc zk- DC- ( , , $$$$), zk- DC

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