使用示例文档
{ "_id": {
"$oid": "527339384bb8d32905f000853"
}, "format": "flat1", "aggregation": "raw", "vm_id": "10101010", "hostname": "foo.example.com", "fooid": "100822", "ts": {
"$date": "2013-11-01T05:00:23.000Z"
}, "cpu_nanoseconds": 1410576880000000, "disk_usage": 20069460, "interface_public_rx_packets": 35771474, "interface_public_rx_bytes": 6023191691, "interface_public_rx_errors": 0, "interface_public_rx_drop": 0, "interface_public_tx_packets": 26004483, "interface_public_tx_bytes": 37293536055, "interface_public_tx_errors": 0, "interface_public_tx_drop": 0, "interface_private_rx_packets": 846833, "interface_private_rx_bytes": 63898435, "interface_private_rx_errors": 0, "interface_private_rx_drop": 0, "interface_private_tx_packets": 39, "interface_private_tx_bytes": 1638, "interface_private_tx_errors": 0, "interface_private_tx_drop": 0, "disk_primary_read_requests": 3280869, "disk_primary_read_bytes": 39818978304, "disk_primary_write_requests": 40331710, "disk_primary_write_bytes": 685420728320, "disk_swap_read_requests": 32, "disk_swap_read_bytes": 823808, "disk_swap_write_requests": 16, "disk_swap_write_bytes": 253952, "vcpu_nanoseconds_0": 470437920000000, "vcpu_nanoseconds_1": 344849460000000, "vcpu_nanoseconds_2": 342793890000000, "max_vcpus": 3}
我有以下按天分组信息的查询:
[ { "$match" : { "vm_id" : "1111223"}},
{ "$group" : {
"_id" : { "$dayOfMonth" : "$ts"},
"month" : { "$first" : { "$month" : "$ts"}},
"year" : { "$first" : { "$year" : "$ts"}},
"vm_id" : { "$first" : "$vm_id"},
"max_public_tx" : { "$max" : "$interface_public_tx_bytes"},
"public_tx_total" : { "$sum" : "$interface_public_tx_bytes"},
"public_rx_total" : { "$sum" : "$interface_public_rx_bytes"},
"private_tx_total" : { "$sum" : "$interface_private_tx_bytes"},
"private_rx_total" : { "$sum" : "$interface_private_rx_bytes"},
"count" : { "$sum" : 1}}
},
{ "$sort" : { "_id" : 1}}
]
所以现在我想把它减少到某一天的几个小时。我想我所需要的只是更改_id,并在每月的第一天向$match添加另一个项目,例如{"$dayOfMonth":"$ts"}:1},但MongoDb非常讨厌它挂起了我的IDE。什么是合适的$match查询?
我目前正在处理的查询:
[ { "$match" : { "vm_id" : "1111223",{ "$dayOfMonth" : "$ts"}: 1 }},
{ "$group" : {
"_id" : { "$hour" : "$ts"},
"day" : {"$first" : {"$dayOfMonth" : "$ts"}},
"month" : { "$first" : { "$month" : "$ts"}},
"year" : { "$first" : { "$year" : "$ts"}},
"vm_id" : { "$first" : "$vm_id"},
"max_public_tx" : { "$max" : "$interface_public_tx_bytes"},
"public_tx_total" : { "$sum" : "$interface_public_tx_bytes"},
"public_rx_total" : { "$sum" : "$interface_public_rx_bytes"},
"private_tx_total" : { "$sum" : "$interface_private_tx_bytes"},
"private_rx_total" : { "$sum" : "$interface_private_rx_bytes"},
"count" : { "$sum" : 1}}
},
{ "$sort" : { "_id" : 1}}
]
在匹配管道中使用$gte和$lt运算符,它将使用您的索引(如果ts在索引中),因此您的匹配管道将是:
{ "$match" : { "vm_id" : "1111223","ts" : {$gte:ISODate('2013-11-01T00:00:00.000Z'), $lt:ISODate('2013-11-02T00:00:00.000Z') }}},
完整查询:
[{ "$match" : { "vm_id" : "1111223","ts" : {$gte:ISODate('2013-11-01T00:00:00.000Z'), $lt:ISODate('2013-11-02T00:00:00.000Z') }}},
{ "$group" : {
"_id" : { "$hour" : "$ts"},
"day" : {"$first" : {"$dayOfMonth" : "$ts"}},
"month" : { "$first" : { "$month" : "$ts"}},
"year" : { "$first" : { "$year" : "$ts"}},
"vm_id" : { "$first" : "$vm_id"},
"max_public_tx" : { "$max" : "$interface_public_tx_bytes"},
"public_tx_total" : { "$sum" : "$interface_public_tx_bytes"},
"public_rx_total" : { "$sum" : "$interface_public_rx_bytes"},
"private_tx_total" : { "$sum" : "$interface_private_tx_bytes"},
"private_rx_total" : { "$sum" : "$interface_private_rx_bytes"},
"count" : { "$sum" : 1}}
},
{ "$sort" : { "_id" : 1}}
]