mongos> db.exomevars.count({"variant.chr":1,"variant.pos":13302,"variant.ref":"C","variant.alt":"T","genotype.GT":"0/0","sample.tags":{ $nin: ["european","mongo"] } })
46
mongos> db.exomevars.count({"variant.chr":1,"variant.pos":13302,"variant.ref":"C","variant.alt":"T","genotype.GT":"0/0","sample.tags":{ $nin: ["european","mongo"] } }).explain()
Wed May 29 20:19:59.338 JavaScript execution failed: TypeError: Object 46 has no method 'explain'
mongos> db.exomevars.find({"variant.chr":1,"variant.pos":13302,"variant.ref":"C","variant.alt":"T","genotype.GT":"0/0","sample.tags":{ $nin: ["european","mongo"] } }).explain()
{
	"clusteredType" : "ParallelSort",
	"shards" : {
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			{
				"cursor" : "BtreeCursor variant.chr_1_variant.pos_1_variant.ref_1_variant.alt_1_genotype.GT_1_sample.tags_1",
				"isMultiKey" : true,
				"n" : 13,
				"nscannedObjects" : 5303042,
				"nscanned" : 6634968,
				"nscannedObjectsAllPlans" : 5303042,
				"nscannedAllPlans" : 6634968,
				"scanAndOrder" : false,
				"indexOnly" : false,
				"nYields" : 24,
				"nChunkSkips" : 0,
				"millis" : 24649,
				"indexBounds" : {
					"variant.chr" : [
						[
							1,
							1
						]
					],
					"variant.pos" : [
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							{
								"$minElement" : 1
							},
							{
								"$maxElement" : 1
							}
						]
					],
					"variant.ref" : [
						[
							{
								"$minElement" : 1
							},
							{
								"$maxElement" : 1
							}
						]
					],
					"variant.alt" : [
						[
							{
								"$minElement" : 1
							},
							{
								"$maxElement" : 1
							}
						]
					],
					"genotype.GT" : [
						[
							"0/0",
							"0/0"
						]
					],
					"sample.tags" : [
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							},
							{
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						]
					]
				},
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		],
		"10.55.3.157:27018" : [
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				"cursor" : "BtreeCursor variant.chr_1_variant.pos_1_variant.ref_1_variant.alt_1_genotype.GT_1_sample.tags_1",
				"isMultiKey" : true,
				"n" : 15,
				"nscannedObjects" : 5220731,
				"nscanned" : 6545577,
				"nscannedObjectsAllPlans" : 5220731,
				"nscannedAllPlans" : 6545577,
				"scanAndOrder" : false,
				"indexOnly" : false,
				"nYields" : 25,
				"nChunkSkips" : 0,
				"millis" : 25073,
				"indexBounds" : {
					"variant.chr" : [
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					"variant.pos" : [
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							},
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					],
					"variant.ref" : [
						[
							{
								"$minElement" : 1
							},
							{
								"$maxElement" : 1
							}
						]
					],
					"variant.alt" : [
						[
							{
								"$minElement" : 1
							},
							{
								"$maxElement" : 1
							}
						]
					],
					"genotype.GT" : [
						[
							"0/0",
							"0/0"
						]
					],
					"sample.tags" : [
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							{
								"$minElement" : 1
							},
							{
								"$maxElement" : 1
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						]
					]
				},
				"server" : "shard02:27018"
			}
		],
		"10.55.3.158:27018" : [
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				"isMultiKey" : true,
				"n" : 8,
				"nscannedObjects" : 5309728,
				"nscanned" : 6640828,
				"nscannedObjectsAllPlans" : 5309728,
				"nscannedAllPlans" : 6640828,
				"scanAndOrder" : false,
				"indexOnly" : false,
				"nYields" : 25,
				"nChunkSkips" : 0,
				"millis" : 24549,
				"indexBounds" : {
					"variant.chr" : [
						[
							1,
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						]
					],
					"variant.pos" : [
						[
							{
								"$minElement" : 1
							},
							{
								"$maxElement" : 1
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						]
					],
					"variant.ref" : [
						[
							{
								"$minElement" : 1
							},
							{
								"$maxElement" : 1
							}
						]
					],
					"variant.alt" : [
						[
							{
								"$minElement" : 1
							},
							{
								"$maxElement" : 1
							}
						]
					],
					"genotype.GT" : [
						[
							"0/0",
							"0/0"
						]
					],
					"sample.tags" : [
						[
							{
								"$minElement" : 1
							},
							{
								"$maxElement" : 1
							}
						]
					]
				},
				"server" : "shard03:27018"
			}
		],
		"10.55.3.159:27018" : [
			{
				"cursor" : "BtreeCursor variant.chr_1_variant.pos_1_variant.ref_1_variant.alt_1_genotype.GT_1_sample.tags_1",
				"isMultiKey" : true,
				"n" : 10,
				"nscannedObjects" : 5215274,
				"nscanned" : 6538526,
				"nscannedObjectsAllPlans" : 5215274,
				"nscannedAllPlans" : 6538526,
				"scanAndOrder" : false,
				"indexOnly" : false,
				"nYields" : 25,
				"nChunkSkips" : 0,
				"millis" : 24185,
				"indexBounds" : {
					"variant.chr" : [
						[
							1,
							1
						]
					],
					"variant.pos" : [
						[
							{
								"$minElement" : 1
							},
							{
								"$maxElement" : 1
							}
						]
					],
					"variant.ref" : [
						[
							{
								"$minElement" : 1
							},
							{
								"$maxElement" : 1
							}
						]
					],
					"variant.alt" : [
						[
							{
								"$minElement" : 1
							},
							{
								"$maxElement" : 1
							}
						]
					],
					"genotype.GT" : [
						[
							"0/0",
							"0/0"
						]
					],
					"sample.tags" : [
						[
							{
								"$minElement" : 1
							},
							{
								"$maxElement" : 1
							}
						]
					]
				},
				"server" : "shard04:27018"
			}
		]
	},
	"cursor" : "BtreeCursor variant.chr_1_variant.pos_1_variant.ref_1_variant.alt_1_genotype.GT_1_sample.tags_1",
	"n" : 46,
	"nChunkSkips" : 0,
	"nYields" : 99,
	"nscanned" : 26359899,
	"nscannedAllPlans" : 26359899,
	"nscannedObjects" : 21048775,
	"nscannedObjectsAllPlans" : 21048775,
	"millisShardTotal" : 98456,
	"millisShardAvg" : 24614,
	"numQueries" : 4,
	"numShards" : 4,
	"millis" : 25120
}
mongos> db.exomevars.count()
318534850