# Running benchmarking on existing index

**URL:** <https://discuss.elastic.co/t/running-benchmarking-on-existing-index/114322>\
**Category:** Elasticsearch\
**Tags:** rally\
**Created:** [January 5, 2018, 6:01pm UTC](https://discuss.elastic.co/t/running-benchmarking-on-existing-index/114322 "2018-01-05T18:01:09Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![danielmitterdorfer](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/danielmitterdorfer/32/110510_2.png) [@danielmitterdorfer](https://discuss.elastic.co/u/danielmitterdorfer)\
**Post date:** [January 8, 2018, 7:06am UTC](https://discuss.elastic.co/t/running-benchmarking-on-existing-index/114322/2 "2018-01-08T07:06:18Z")

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Hi @Alp1,

if you set `auto-managed` to `false`, there is no need for you to provide a mapping file. In fact, you can just remove the entire `indices` section and just define an index and a type explicitly in the search operation. Here is a minimal example from the [docs](http://esrally.readthedocs.io/en/stable/track.html#examples):

```auto
{
  "challenge": {
    "name": "just-search",
    "schedule": [
      {
        "operation": {
          "operation-type": "search",
          "index": "_all",
          "body": {
            "query": {
              "match_all": {}
            }
          }
        },
        "warmup-iterations": 100,
        "iterations": 100,
        "target-throughput": 10
      }
    ]
  }
}

```

It will run a `match_all` query against all indices of the target cluster with one client.

To be clear: This is not just a snippet, it is the entire content of your track. You can save this e.g. as `search.json` and run it with

```auto
esrally --pipeline=benchmark-only --target-hosts=node_1_ip:9200,node_2_ip:9200 --track-path=search.json

```

(this requires that you are on the latest stable version of Rally though which is 0.8.1 at the moment, check with `esrally --version`).

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_[View the full topic](https://discuss.elastic.co/t/running-benchmarking-on-existing-index/114322)._