Hi ES experts,
I have instances (XWiki instances to be precise) sending pings every day to
an ES server (the model is very simple: one _timestamp field for the date
and an "instanceId" field for uniquely identifying the instance sending the
ping).
I'd like to find how to write a query that shows the average number of days
each instance has been sending pings, by displaying counts for instances
having their last ping date - first ping date < 1 day, between 1 day and 7
days, between 7 days and 365 days and over 365 days.
I've tried several aggregations but I can't find one that will work out.
I'd like something like this:
curl -XGET
"http://localhost:9200/installs/install/_search?search_type=count&pretty=1"
-d'
{
"aggs": {
"installs_by_range" : {
"range" : {
"script" : "<compute max_date - min_date in days here>",
"ranges" : [
{ "to" : 2 },
{ "from" : 2, "to" : 30 },
{ "from" : 30, "to" : 365 },
{ "from" : 365 }
]
},
"aggs" : {
"instanceIds" : {
"terms" : { "field" : "instanceId" },
"aggs" : {
"min_date" : { "min" : { "field" : "_timestamp" } },
"max_date" : { "max" : { "field" : "_timestamp" } }
}
}
}
}
}
}'
Here's a script to generate some minimal data:
http://design.xwiki.org/xwiki/bin/view/Proposal/ActiveInstalls2#HData
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On Friday, April 4, 2014 3:45:15 PM UTC+2, Vincent Massol wrote:
Hi ES experts,
I have instances (XWiki instances to be precise) sending pings every day
to an ES server (the model is very simple: one _timestamp field for the
date and an "instanceId" field for uniquely identifying the instance
sending the ping).
I'd like to find how to write a query that shows the average number of
days each instance has been sending pings, by displaying counts for
instances having their last ping date - first ping date < 1 day, between 1
day and 7 days, between 7 days and 365 days and over 365 days.
I've tried several aggregations but I can't find one that will work out.
I'd like something like this:
curl -XGET "
http://localhost:9200/installs/install/_search?search_type=count&pretty=1"
-d'
{
"aggs": {
"installs_by_range" : {
"range" : {
"script" : "<compute max_date - min_date in days here>",
"ranges" : [
{ "to" : 2 },
{ "from" : 2, "to" : 30 },
{ "from" : 30, "to" : 365 },
{ "from" : 365 }
]
},
"aggs" : {
"instanceIds" : {
"terms" : { "field" : "instanceId" },
"aggs" : {
"min_date" : { "min" : { "field" : "_timestamp" }
},
"max_date" : { "max" : { "field" : "_timestamp" } }
}
}
}
}
}
}'
Here's a script to generate some minimal data:
http://design.xwiki.org/xwiki/bin/view/Proposal/ActiveInstalls2#HData
oops forget to finish my email 
---- end of previous email ----
Thanks a lot for any pointer!
-Vincent
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