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Scrolledit
The scroll API allows you to efficiently page through a large dataset as it keeps the query alive in the cluster.
var scanResults = this._client.Search<ElasticSearchProject>(s => s
.From(0)
.Size(1)
.MatchAll()
.Fields(f => f.Name)
.SearchType(Nest.SearchType.Scan)
.Scroll("2s")
);
Assert.True(scanResults.IsValid);
Assert.False(scanResults.Documents.Any());
Assert.IsNotNullOrEmpty(scanResults.ScrollId);
var scrolls = 0;
var results = this._client.Scroll<ElasticSearchProject>("4s", scanResults.ScrollId);
while (results.Documents.Any())
{
Assert.True(results.IsValid);
Assert.True(results.Documents.Any());
Assert.IsNotNullOrEmpty(results.ScrollId);
results = this._client.Scroll<ElasticSearchProject>("4s", results.ScrollId);
scrolls++;
}
Assert.AreEqual(18, scrolls);