# Different engine or an extra field? **URL:** \ **Category:** Elastic Search\ **Tags:** elastic-app-search\ **Created:** [May 23, 2020, 1:34pm UTC](https://discuss.elastic.co/t/different-engine-or-an-extra-field/233998 "2020-05-23T13:34:47Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![A\_Tran](https://avatars.discourse-cdn.com/v4/letter/a/e19adc/32.png) [@A\_Tran](https://discuss.elastic.co/u/A_Tran)\ **Post date:** [May 23, 2020, 1:34pm UTC](https://discuss.elastic.co/t/different-engine-or-an-extra-field/233998/1 "2020-05-23T13:34:47Z")
Hi to everyone, could you help me with the correct way to proceed? I have a project in app search that is made up of 3 databases, all with a similar structutre, but each with a different source. So do I add one more field to each database where I indicate the source so I can filter by source? Or do I upload each database to a different Engine and then just do a Meta Engine and set each Engine as a filter? Thanks ---
**Author:** ![JasonStoltz](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jasonstoltz/32/49893_2.png) [@JasonStoltz](https://discuss.elastic.co/u/JasonStoltz)\ **Post date:** [June 5, 2020, 11:43am UTC](https://discuss.elastic.co/t/different-engine-or-an-extra-field/233998/2 "2020-06-05T11:43:51Z")
That's a good question. I would recommend adding the field to indicate source. I don't think you'd need Meta Engines for this. I would only recommend Meta Engines if you had a scenario where each engine had different teams responsible for managing it. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 3, 2020, 11:44am UTC](https://discuss.elastic.co/t/different-engine-or-an-extra-field/233998/3 "2020-07-03T11:44:00Z")
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