# Use of fingerprint for searching, visualizing, etc **URL:** \ **Category:** Elasticsearch\ **Created:** [March 21, 2018, 4:57am UTC](https://discuss.elastic.co/t/use-of-fingerprint-for-searching-visualizing-etc/124903 "2018-03-21T04:57:23Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Sylvain-69](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sylvain-69/32/26561_2.png) [@Sylvain-69](https://discuss.elastic.co/u/Sylvain-69)\ **Post date:** [March 21, 2018, 4:57am UTC](https://discuss.elastic.co/t/use-of-fingerprint-for-searching-visualizing-etc/124903/1 "2018-03-21T04:57:24Z")
Hello everybody ! Here is what I have in elasticsearch : URL access logs with those fields : SourceIP, SourcePort, DestIP, DestPort, User, SessionID, Fingerprint (made with all the previous fields), URL. Into the same index I have traffic logs with those fields : SourceIP, SourcePort, DestIP, DestPort, User, SessionID, Fingerprint (made with all the previous fields), BytesRecived, BytesSent. I would like to be able to correlate the two logs with the fingerprint so I can see for example a top 10 of the accessed URLs by bytes received or sent. Is that possible ? ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [March 22, 2018, 5:52am UTC](https://discuss.elastic.co/t/use-of-fingerprint-for-searching-visualizing-etc/124903/2 "2018-03-22T05:52:24Z")
That's a join using the fingerprint value, and Elasticsearch cannot do joins. You could use the fingerprint value as the `_id` and then update the initial document with the new info (whether that is the URL or the bytes). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [April 19, 2018, 5:52am UTC](https://discuss.elastic.co/t/use-of-fingerprint-for-searching-visualizing-etc/124903/3 "2018-04-19T05:52:43Z")
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