# Aggregating tags **URL:** \ **Category:** Elasticsearch\ **Created:** [April 29, 2016, 10:36am UTC](https://discuss.elastic.co/t/aggregating-tags/48795 "2016-04-29T10:36:57Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Sandhya\_Rathinapandi](https://avatars.discourse-cdn.com/v4/letter/s/6bbea6/32.png) [@Sandhya\_Rathinapandi](https://discuss.elastic.co/u/Sandhya_Rathinapandi)\ **Post date:** [April 29, 2016, 10:36am UTC](https://discuss.elastic.co/t/aggregating-tags/48795/1 "2016-04-29T10:36:57Z")
Hi, we are using a index where we have 3 fields type, fileinfo and timestamp. In the fileinfo field I will be having a json String where there will count of different number of file formats. example: {"items":[{"type":"xml","size":0.020,"filecount":80},{"type":"pdf","size":104.245,"filecount":20}]} Now my problem is I want to set the sum of the size of all the pdf files. similary for other types of files Is there any way to do this. Thanks, Sandhya ---
**Author:** ![rjernst](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rjernst/32/6363_2.png) [@rjernst](https://discuss.elastic.co/u/rjernst)\ **Post date:** [April 29, 2016, 9:29pm UTC](https://discuss.elastic.co/t/aggregating-tags/48795/2 "2016-04-29T21:29:21Z")
Take a look at scripted metric aggregations. You could do a terms aggregation on type, and in your script sum the size field. [https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-metrics-scripted-metric-aggregation.html](https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-metrics-scripted-metric-aggregation.html) ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 5, 2017, 10:55pm UTC](https://discuss.elastic.co/t/aggregating-tags/48795/3 "2017-07-05T22:55:09Z")
Closed on July 5, 2017, 10:55pm UTC