How to index List into elasticsearch via NEST c#

Question

I need to put a lot of entries from List<Person> into elasticsearch via NEST library. I can put one by one using loop and code below:

var person = new Person
{
    Id = "1",
    Firstname = "Martijn",
    Lastname = "Laarman"
};

var index = client.Index(person);

But seems like it works really slow. Is there any way for doing that more quickly via NEST?

monstertjie_za · Accepted Answer · 2017-01-09 05:22:31Z

6

Take a look at the BulkDescriptor object.

Then you can do something as follow:

private readonly ElasticClient _client; //needs to be initialized in your code
public void Index(IEnumerable<Person> documents)
    {
        var bulkIndexer = new BulkDescriptor();

        foreach (var document in documents)
        {
            bulkIndexer.Index<Person>(i => i
                .Document(document)
                .Id(document.SearchDocumentId)
                .Index(_indexName));
        }

        _client.Bulk(bulkIndexer);
    }

The function Index, takes an IEnumerable of your type. So when you loop through your items to index, instead of adding each object to the index individually, use this function to pass the collection to, and it will bulk index the objects for you.

edited Jan 9, 2017 at 5:22

answered Jan 9, 2017 at 5:17

monstertjie_za

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2 Comments

kkost Over a year ago

Thanks a lot. Works faster that in the loop more than 100 times. In the loop I spent more that hour for input 144k entities. By using bulk input I've spent 81 second.

monstertjie_za Over a year ago

Glad I could help :-)

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