You can set the size to 0.
http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-from-size.html
You will still get back the search metadata though.
--
Ivan
On Thu, May 22, 2014 at 4:46 AM, Subhadip Bagui <i.ba...@gmail.com> wrote:
> Hi,
>
> I want to get the average value of MEMORY field from my ES document. Below
> is the query I'm using for that. Here I'm getting the aggregation along
> with the hits Json also. Is there any way we can get the aggreation result
> only. Please suggest.
>
> POST /virtualmachines/_search
> {
> "query" : {
> "filtered" : {
> "query" : { "match" : {
> "CLOUD_TYPE" : "CLOUDSTACK"
> }},
> "filter" : {
> "range" : { "NODE_CREATE_TIME" : { "from" : "2014-05-22
> 14:11:35", "to" : "2014-05-22 14:33:35" }}
> }
> }
> },
> "aggs" : {
> "memory_avg" : { "avg" : { "field" : "MEMORY" } }
> }
> }
>
> *response* :
> {
> "took": 2,
> "timed_out": false,
> "_shards": {
> "total": 3,
> "successful": 3,
> "failed": 0
> },
> "hits": {
> "total": 1,
> "max_score": 1,
> "hits": [
> {
> "_index": "virtualmachines",
> "_type": "nodes",
> "_id": "102",
> "_score": 1,
> "_source": {
> "NODE_ID": "12235",
> "CLOUD_TYPE": "CLOUDSTACK",
> "NODE_GROUP_NAME": "JBOSS",
> "NODE_CPU": "4GHZ",
> "NODE_HOSTNAME": "cloud.aricent.com",
> "NODE_NAME": "cloudstack-node1",
> "NODE_PRIVATE_IP_ADDRESS": "10.123.124.125",
> "NODE_PUBLIC_IP_ADDRESS": "125.31.108.72",
> "NODE_INSTANCE_ID": "cloudstack112",
> "NODE_STATUS": "ACTIVE",
> "NODE_CATEGORY_ID": "13",
> "NODE_CREATE_TIME": "2014-05-22 14:23:04",
> "CPU_SPEED": "500",
> "MEMORY": 512,
> "CPU_USED": "0.03%"
> }
> }
> ]
> },
> "aggregations": {
> "memory_avg": {
> "value": 512
> }
> }
> }
>
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