# Identical data uploaded - What to expect, overwrite/update/something else? **URL:** \ **Category:** Elasticsearch\ **Created:** [February 5, 2014, 12:46am UTC](https://discuss.elastic.co/t/identical-data-uploaded-what-to-expect-overwrite-update-something-else/15608 "2014-02-05T00:46:32Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Tony\_Su](https://avatars.discourse-cdn.com/v4/letter/t/8dc957/32.png) [@Tony\_Su](https://discuss.elastic.co/u/Tony_Su)\ **Post date:** [February 5, 2014, 12:46am UTC](https://discuss.elastic.co/t/identical-data-uploaded-what-to-expect-overwrite-update-something-else/15608/1 "2014-02-05T00:46:32Z")
If data is re-loaded which is identical in every way to data which already exists in ES, Is new metadata created that simply over-writes existing (zero net effect)? Or is duplicate, unique metadata created? Or, maybe since identical data is found to already exist, although the update API was not used it would be invoked anyway? I think I understand that if data was inserted using the update API, then there would be an orderly addition to current metadata, incrementing the version but I'm interested in what would happen if the update api is not used. Thx, Tony -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/27a3bc1f-a500-4e4a-9088-0ab78e329fca%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/27a3bc1f-a500-4e4a-9088-0ab78e329fca%40googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![jsbonline2006](https://avatars.discourse-cdn.com/v4/letter/j/85f322/32.png) [@jsbonline2006](https://discuss.elastic.co/u/jsbonline2006)\ **Post date:** [February 5, 2014, 3:22am UTC](https://discuss.elastic.co/t/identical-data-uploaded-what-to-expect-overwrite-update-something-else/15608/2 "2014-02-05T03:22:28Z")
Hi Tony, What I have observed in my so far experience with ES that it simply over-write the exisiting data with change in version. Regards, Jayesh Bhoyar [http://www.linkedin.com/in/jayeshbhoyar](http://www.linkedin.com/in/jayeshbhoyar) On Wednesday, February 5, 2014 6:16:32 AM UTC+5:30, Tony Su wrote: > If data is re-loaded which is identical in every way to data which already > exists in ES, > > Is new metadata created that simply over-writes existing (zero net effect)? > Or is duplicate, unique metadata created? > Or, maybe since identical data is found to already exist, although the > update API was not used it would be invoked anyway? > > I think I understand that if data was inserted using the update API, then > there would be an orderly addition to current metadata, incrementing the > version but I'm interested in what would happen if the update api is not > used. > > Thx, > Tony -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). To view this discussion on the web visit [https://groups.google.com/d/msgid/elasticsearch/c6482bec-c73d-404c-bc21-06c5e39016f8%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/c6482bec-c73d-404c-bc21-06c5e39016f8%40googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 1:52am UTC](https://discuss.elastic.co/t/identical-data-uploaded-what-to-expect-overwrite-update-something-else/15608/3 "2017-07-06T01:52:35Z")