Zookeeper knows nothing at all about Solr, it's fully generic. The code for SolrCloud on each of the Solr instances _does_ know about Zookeeper, and where to expect certain information, specifically where the configurations are stored on Zookeeper. So on startup, the Solr instance queries Zookeeper for, in this case, the config set which is just a path on Zookeeper. For each collection on the Solr node it pulls the appropriate configs down, loads and goes. So the path is something like /configs/whatevertheconfignameis.....
HTH, Erick On Thu, Dec 18, 2014 at 3:53 PM, E S J <esj.f...@gmail.com> wrote: > Hi Erick, > > This question came to my mind after sometime seen your reply, Why Solr > configurations are kept on ZooKeeper ? > As far as I know, ZooKeeper is generic system can be used for any cross > node configurations, not only with Solr, Solr configurations are Solr > Specific, How ZooKeeper know/read Solr specific configurations. Does ZK > has auto detect ZooKeeper plugins ? > > Can you help me to understand this ? > > thanks, > Shanaka > > On 12 December 2014 at 14:23, Erick Erickson <erickerick...@gmail.com> > wrote: >> >> bq: 1. Like to know what I have done is correct ? >> Looks fine to me. >> >> bq: 2. Where to place the schema.xml's and other configurations. Because >> for >> the moment it's are under collection1/conf folder and collection1 is not an >> active collection for me. ( i'm using only c-ins core) >> >> I think you're a bit confused here. The configuration stuff is NOT >> "under collection1/conf" as far as SolrCloud is concerned, it's in >> Zookeeper in /configs/default, take a look at the admin>>cloud page, >> click the /configs entry and I think you'll see a "defaults" node. >> >> As far as SolrCloud is concerned, that's where your configs live. The >> fact that they exist in <solr-home>/collection1/conf on your local >> machine is totally irrelevant. Tomorrow, you could issue an upconfig >> and use something like ".....-confdir mytotallynewdirectory/conf >> -confname default" and SolrCloud would happily overwrite your configs >> in the Zookeeper "default" node with the new ones, _and_ distribute >> them to all the Solr nodes when they were restarted. >> >> So where your configs "should" live is in some kind of version >> control...... >> >> HTH, >> Erick >> >> On Thu, Dec 11, 2014 at 6:19 PM, E S J <esj.f...@gmail.com> wrote: >> > Hello Team, >> > >> > I would like to get clarified where to place schema.xml on SolrCloud >> set-up. >> > >> > My Solr cloud set-up , 3 nodes, 3 shards and 3 replications, 3 ZooKeeper >> > >> > What I have done is, >> > 1. Taken a solr.war from solr default download ( >> > solr-4.10.2/example/webapps/solr.war - 4.10.2) and placed >> > <tomcat-home>/webapps/ folder. >> > >> > 2. Taken Solr home from solr default download ( >> solr-4.10.2/example/solr/) >> > and placed on solr.home >> > (Copied Collection folder as well along with solr.xml) >> > >> > 3. Started 3 solr nodes and zookeepr instances ( after correct >> > configuration) >> > >> > 4. Register solr configurations of ZooKeeper using, >> > zkcli.sh -zkhost zoo1.internal:2183,zoo2.internal:2183,zoo3.internal:2183 >> > -cmd upconfig -confdir <solr-home>/collection1/conf -confname default >> > >> > 5. Create 3 Shard's and 3 Replicas : >> > >> http://solr1.internal:7003/solr/admin/collections?action=CREATE&name=c-ins&replicationFactor=3&numShards=3&collection.configName=default&maxShardsPerNode=3&wt=json&indent=2 >> > >> > >> > After that I can see following folder structure in Solr node1's >> > <solr-home> directory ( Can see similar structure on my other 2 solr >> nodes) >> > -rw-r--r-- solr.xml drwxrwxr-x c-ins_shard1_replica1 drwxrwxr-x >> > c-ins_shard2_replica1 drwxrwxr-x c-ins_shard3_replica1 drwxr-xr-x >> > collection1 >> > >> > >> > I've done some xml docuemnt indexing and it's working fine, Zoo-keepers >> are >> > also working fine, My Questions are, >> > >> > 1. Like to know what I have done is correct ? >> > 2. Where to place the schema.xml's and other configurations. Because for >> > the moment it's are under collection1/conf folder and collection1 is not >> an >> > active collection for me. ( i'm using only c-ins core) >> > >> > >> > Appreciate your time on this. >> > >> > Thanks - Elike >>
