Create or update mapping in elasticsearch

Generally speaking, you can update your index mapping using the put mapping api (reference here) : curl -XPUT ‘http://localhost:9200/advert_index/_mapping/advert_type’ -d ‘ { “advert_type” : { “properties” : { //your new mapping properties } } } ‘ It’s especially useful for adding new fields. However, in your case, you will try to change the location type, … Read more

How does MongoDB index arrays?

When it comes to indexing arrays, MongoDB indexes each value of the array so you can query for individual items, such as “red.” For example: > db.col1.save({‘colors’: [‘red’,’blue’]}) > db.col1.ensureIndex({‘colors’:1}) > db.col1.find({‘colors’: ‘red’}) { “_id” : ObjectId(“4ccc78f97cf9bdc2a2e54ee9”), “colors” : [ “red”, “blue” ] } > db.col1.find({‘colors’: ‘blue’}) { “_id” : ObjectId(“4ccc78f97cf9bdc2a2e54ee9”), “colors” : [ “red”, … Read more

What’s the difference between an inverted index and a plain old index?

One common use is “…to allow fast full-text searching.” The two types denote directionality. One takes you forward through the index, and the other takes you backward (the inverse) through the index. That’s it. There’s no mystery to uncover here. Otherwise the two types are identical, it’s just a question of what information you have, … Read more

How can I stop indexing intellij idea?

You can stop synchronizing/indexing each time you switch to the IDEA and it’s quite useful when dealing with big projects and outside build process which triggers indexing. Just disable checkbox System Settings -> Synchronize files on frame or editor tab activation. Make sure you run indexing manually to update hints when needed through Synchronize menu … Read more

Difference between local and global indexes in DynamoDB

Local Secondary Indexes still rely on the original Hash Key. When you supply a table with hash+range, think about the LSI as hash+range1, hash+range2.. hash+range6. You get 5 more range attributes to query on. Also, there is only one provisioned throughput. Global Secondary Indexes defines a new paradigm – different hash/range keys per index. This … Read more

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