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Re: zookeeper errors - Solr - [mail # user]
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...It sounds like you probably need to raise the default 15 sec zk client timeout. We have it default to a fairly aggressive setting. For high load envs, you may have to bring it to 30 or 45 se...
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Author: Mark Miller,
2013-05-05, 18:21
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Re: Zookeeper specs - Solr - [mail # user]
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...In a steady state, a SolrCloud cluster puts no load on ZooKeeper other than maintaining heart beats for the most part. The heaviest load might be when you start up a few hundred nodes...
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... and they all keep loading and receiving state rapidly at the same time. ZooKeeper handles that pretty easily though. In my experience, SolrCloud is a walk in the park for ZK, so you probably don...
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Author: Mark Miller,
2013-03-19, 19:07
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Re: Protecting content in zookeeper - Lucene - [mail # dev]
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... On Mar 14, 2013, at 3:16 AM, Per Steffensen wrote: That's just the only reason I care about. Otherwise, I'm of a similar mind with ZooKeeper security as I am with Solr - lock it up...
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... behind closed doors and only allow trusted access. Makes things simpler for us. The problem is that it's really nice to only have to run one ZooKeeper for many services. And in that case, it...
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Author: Mark Miller,
2013-03-14, 16:21
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Re: Protecting content in zookeeper - Lucene - [mail # dev]
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...On Mar 13, 2013, at 7:36 AM, Per Steffensen wrote: I think that as long as you could do things with no credentials or setup by default, ZooKeeper security would be nice to optionally...
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... support. I'm sure that anyone sharing zookeeper for multiple services wouldn't mind being able to set up some permissions. - Mark On Mar 13, 2013, at 7:36 AM, Per Steffensen wrote: ...
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Author: Mark Miller,
2013-03-13, 16:07
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Re: Role of zookeeper at runtime - Solr - [mail # user]
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... On Feb 26, 2013, at 6:49 PM, varun srivastava wrote: We keep the zookeeper info cached locally. We only updated it when ZooKeeper tells us it has changed. All of the updates that hash...
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Author: Mark Miller,
2013-02-28, 14:12
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Re: Role of zookeeper at runtime - Solr - [mail # user]
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... though, the appropriate stuff will be in ZooKeeper. - Mark On Feb 28, 2013, at 9:04 PM, varun srivastava wrote: ...
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Author: Mark Miller,
2013-03-01, 03:22
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Re: Role of zookeeper at runtime - Solr - [mail # user]
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... On Feb 26, 2013, at 5:25 PM, varun srivastava wrote: No, it's not used per request. Solr talks to ZooKeeper on SolrCore startup - to get configs and set itself up. Then it only talks...
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... to ZooKeeper when a cluster state change happens - in that case, ZooKeeper pings Solr and Solr will get an update view of the cluster. That view is cached and used for requests. In a stable state...
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| ..., Solr is not talking to ZooKeeper other than the heartbeat they keep to know a node is up. Basic round robin. Traffic stats are not currently in Zk. It will stop allowing updates... |
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Author: Mark Miller,
2013-02-26, 23:09
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Re: Role of zookeeper at runtime - Solr - [mail # user]
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...On Feb 28, 2013, at 6:20 PM, varun srivastava wrote: You can replicate from a SolrCloud node still. Just hit it's replication handler and pass in the master url to replicate to....
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Author: Mark Miller,
2013-03-01, 00:27
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Re: Role of zookeeper at runtime - Solr - [mail # user]
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...ZooKeeper / /clusterstate.json - info about the layout and state of the cluster - collections, shards, urls, etc /collections - config to use for the collection, shard leader voting zk...
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Author: Mark Miller,
2013-02-26, 23:34
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Re: solrcloud-zookeeper - Solr - [mail # user]
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...By default, on cluster startup, we wait until we see all the replicas for a shard come up. This is for safety. You may have introduced an old shard with old data or a new shard with no data,...
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Author: Mark Miller,
2013-02-12, 14:15
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