A null value and an empty string both result in no value being indexed, in which case you can use the exists filter curl -XGET ‘http://127.0.0.1:9200/test/test/_search?pretty=1’ -d ‘ { “query” : { “constant_score” : { “filter” : { “exists” : { “field” : “myfield” } } } } } ‘ Or in combination with (eg) … Read more
After evaluating both Redis and RabbitMQ I chose RabbitMQ as our broker for the following reasons: RabbitMQ allows you to use a built in layer of security by using SSL certificates to encrypt the data that you are sending to the broker and it means that no one will sniff your data and have access … Read more
The filtered query has been deprecated and removed in ES 5.0. You should now use the bool/must/filter query instead. { “query”: { “bool”: { “must”: { “multi_match”: { “operator”: “and”, “fields”: [ “author”, “title”, “publisher”, “year” ], “query”: “George Orwell” } }, “filter”: { “terms”: { “year”: [ 1980, 1981 ] } } } } … Read more
In /etc/elasticsearch/elasticsearch.yml put network.host: 0.0.0.0
The selected answer makes it sound slightly more complex than it is, the following is what you need (install npm first on your system). npm install -g elasticdump elasticdump –input=http://mysrc.com:9200/my_index –output=http://mydest.com:9200/my_index –type=mapping elasticdump –input=http://mysrc.com:9200/my_index –output=http://mydest.com:9200/my_index –type=data You can skip the first elasticdump command for subsequent copies if the mappings remain constant. I have just done … Read more
Elasticsearch has dropped the string type and is now using text. So your code should be something like this “name” => [ “type” => “text”, “analyzer” => “ik_max_word” ]
In ElasticSearch >= 5 the documentation has changed, which means none of the above answers worked for me. I tried changing ES_HEAP_SIZE in /etc/default/elasticsearch and in /etc/init.d/elasticsearch, but when I ran ps aux | grep elasticsearch the output still showed: /usr/bin/java -Xms2g -Xmx2g # aka 2G min and max ram I had to make these … Read more
One of our applications uses data that is stored into both Cassandra and ElasticSearch. We use Cassandra to access those records whenever we can, and have data duplicated into query tables designed to adhere to specific application-side requests. For a more liberal search than our query tables can allow, ElasticSearch performs that functionality nicely. We … Read more
Edit /etc/elasticsearch/elasticsearch.yml and add the following line: network.host: 0.0.0.0 This will “unset” this parameter and will allow connections from other IPs.
There are two primary Elasticsearch use cases: Text search You want Elasticsearch when you’re doing a lot of text search, where traditional RDBMS databases are not performing really well (poor configuration, acts as a black-box, poor performance). Elasticsearch is highly customizable, extendable through plugins. You can build robust search without much knowledge quite fast. Logging … Read more