Solr and ZooKeeper

<solr-clusters>

<solr-clusters>
  <solr-cluster id="is_cluster" zookeeper-id="zoo">
    <solr-collections>
      <solr-collection
        id="main_index" type="main"
        lucene-match-version=""
        max-shards-per-node="4" num-shards="4" num-replicas="1"
      />
      <solr-collection
        id="match_index1" type="match"
        lucene-match-version=""
        max-shards-per-node="4" num-shards="4" num-replicas="1"
      />
      <solr-collection
        id="match_index2" type="match"
        lucene-match-version=""
        max-shards-per-node="4" num-shards="4" num-replicas="1"
      />
      <solr-collection
        id="highlight_index" type="highlight"
        lucene-match-version=""
        max-shards-per-node="4" num-shards="4" num-replicas="1"
      />
      <solr-collection
        id="chart_index" type="chart"
        lucene-match-version=""
        max-shards-per-node="4" num-shards="4" num-replicas="1"
      />
      <solr-collection 
        id="vq_index" type="vq"
        lucene-match-version=""
        max-shards-per-node="4" num-shards="4" num-replicas="1"
      />

    </solr-collections>
    <solr-nodes>
      <solr-node
        memory="2g"
        id="node1"
        host-name=""
        data-dir=""
        port-number="8983"
      />
    </solr-nodes>
  </solr-cluster>
</solr-clusters>

The <solr-clusters> element includes a child <solr-cluster> element. The id attribute of the <solr-cluster> element is a unique identifier for the Solr cluster. To associate the Solr cluster with the ZooKeeper instance, the value of the zookeeper-id attribute must match the value of the id attribute of the <zookeeper> element.

<solr-collections>

The <solr-collections> element is a child of the <solr-cluster> element. The <solr-collections> element has child <solr-collection> elements.

Depending on the WARs that are included in the application, the number and type of required child <solr-collection> elements is different.

opal-services-is

In the opal-services-is WAR, you must have <solr-collection> elements with each of the following values for the type attribute:

• main - you must have either one or two collections of type main
• match - you must have two collections of type match
• highlight - you must have one collection of type highlight
• chart - you must have one collection of type chart
• vq - you must have one collection of type vq

opal-services-daod

In the opal-services-daod WAR, you must have one <solr-collection> element with a value of daod for the type attribute.

opal-services-is-daod

In the opal-services-is-daod WAR, you must have <solr-collection> elements with each of the following values for the type attribute:

• main - you must have either one or two collections of type main
• daod - you must have one collection of type daod
• match - you must have two collections of type match
• highlight - you must have one collection of type highlight
• chart - you must have one collection of type chart
• vq - you must have one collection of type vq

The <solr-collection> element has the following attributes:

Attribute	Description
id	An identifier that is used to identify the Solr collection.
type	The type of the collection. The possible values are: main daod match highlight chart
lucene-match-version	The Lucene version that is used for the collection. At this release, the value is populated when you deploy i2 Analyze.
num-shards	The number of logical shards that are created as part of the Solr collection.
num-replicas	The number of physical replicas that are created for each logical shard in the Solr collection.
max-shards-per-node	The maximum number of shards that are allowed on each Solr node. This value is the result of num-shards multiplied by num-replicas.
min-replication-factor	The minimum number of replicas that an update must be replicated to for the operation to succeed. This value must be greater than 0 and less than or equal to the value of num-replicas. This attribute is optional.
num-csv-write-threads	The number of threads that are used to read from the database and write to the temporary .csv file when indexing data in the Information Store. This attribute is optional, and applies to Solr collections of type main and match only. The total of num-csv-write-threads and num-csv-read-threads must be less than the number of cores available on the Liberty server.
num-csv-read-threads	The number of threads that are used to read from the temporary .csv file and write to the index when indexing data in the Information Store. This attribute is optional, and applies to Solr collections of type main and match only. This value must be less than the value of num-shards. The total of num-csv-write-threads and num-csv-read-threads must be less than the number of cores available on the Liberty server.

<solr-nodes>

The <solr-nodes> element is a child of the <solr-cluster> element. The <solr-nodes> element can have one or more child <solr-node> elements. Each <solr-node> element has the following attributes:

Attribute	Description
id	A unique identifier that is used to identify the Solr node.
memory	The amount of memory that can be used by the Solr node.
host-name	The hostname of the Solr node.
data-dir	The location that Solr stores the index.
port-number	The port number of the Solr node.

<zookeepers>

<zookeepers>
  <zookeeper id="zoo">
    <zkhosts>
      <zkhost
        id="1"
        host-name=""
        data-dir=""
        port-number="9983"
        quorum-port-number=""
        leader-port-number=""
      />
    </zkhosts>
  </zookeeper>
</zookeepers>

The <zookeepers> element includes a child <zookeeper> element. The id attribute of the <zookeeper> element is a unique identifier for the ZooKeeper instance. To associate the ZooKeeper instance with the Solr cluster, the value of the id attribute must match the value of the zookeeper-id attribute of the <solr-cluster> element.