On 1/11/2016 11:13 AM, Jim Shi wrote: > Hi, I have question regarding collection configurations stored Zoo Keeper > with solrCloud. > All collection configurations are stored at Zoo Keeper. What happens if you > want to restart all Zoo Keeper instances? Does the Zoo Keeper persists data > on disk and can restore all configurations from disk?
Typically Zookeeper does store its database on disk. I do not know whether there are config options that would change this behavior. If there are, then I hope that you would be aware that they have been used. If you have at least three zookeeper nodes, then you can restart them one at a time and as long as they come up properly and your SolrCloud installation is properly configured to use all of the zookeeper nodes, it will not experience any problems. A zookeeper ensemble with fewer than three nodes is not fault tolerant. Solr's zkHost parameter must include all of the zookeeper nodes in the ensemble. For stability, we recommend using standalone zookeeper software (separate from Solr), with typical zookeeper defaults. The amount of support this mailing list can provide for zookeeper is minimal, but we will attempt to help with simple problems. The zookeeper project has its own mailing lists. Thanks, Shawn
