# Elasticsearch "READ ONLY" Indices

**URL:** <https://discuss.elastic.co/t/elasticsearch-read-only-indices/280837>\
**Category:** Elasticsearch\
**Created:** [August 9, 2021, 4:25pm UTC](https://discuss.elastic.co/t/elasticsearch-read-only-indices/280837 "2021-08-09T16:25:03Z")\
**Posts on this page:** 9\
**Page:** 1

<div class="post-metadata">

**Author:** ![tusharnemade](https://avatars.discourse-cdn.com/v4/letter/t/67e7ee/32.png) [@tusharnemade](https://discuss.elastic.co/u/tusharnemade)\
**Post date:** [August 9, 2021, 4:25pm UTC](https://discuss.elastic.co/t/elasticsearch-read-only-indices/280837/1 "2021-08-09T16:25:03Z")

</div>

Hello Team:

I am using Elasticsearch version 7.8.0..

I am using Index Settings :

`index.blocks.read_only_allow_delete: true ` for my indices ...

If i run a CURL command to update my index settings

```auto
curl -X PUT "localhost:9200/my-index-000001/_settings?pretty" -H 'Content-Type: application/json' -d'
{
  "index" : {
    "refresh_interval" : "-1"
  }
}
'

```

1. Operation is perform successfully
2. It removed my existing Index settings of "`index.blocks.read_only_allow_delete: true `"

could you please help me to understand why is this behaviour.

---

<div class="post-metadata">

**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\
**Post date:** [August 9, 2021, 4:32pm UTC](https://discuss.elastic.co/t/elasticsearch-read-only-indices/280837/2 "2021-08-09T16:32:06Z")

</div>

The [docs for `index.blocks.read_only_allow_delete`](https://www.elastic.co/guide/en/elasticsearch/reference/7.8/index-modules.html) say:

> **IMPORTANT** : Elasticsearch adds and removes the read-only index block automatically when the disk utilization falls below the high watermark.

---

<div class="post-metadata">

**Author:** ![tusharnemade](https://avatars.discourse-cdn.com/v4/letter/t/67e7ee/32.png) [@tusharnemade](https://discuss.elastic.co/u/tusharnemade)\
**Post date:** [August 10, 2021, 2:36am UTC](https://discuss.elastic.co/t/elasticsearch-read-only-indices/280837/3 "2021-08-10T02:36:13Z")

</div>

Hi David

I did read the doc , before raising it in here ..

I am not having DISK utilization issue .. i am having ample amount of space.

its automatically removed when i am adding above said settings for my index.

---

<div class="post-metadata">

**Author:** ![tusharnemade](https://avatars.discourse-cdn.com/v4/letter/t/67e7ee/32.png) [@tusharnemade](https://discuss.elastic.co/u/tusharnemade)\
**Post date:** [August 10, 2021, 2:53am UTC](https://discuss.elastic.co/t/elasticsearch-read-only-indices/280837/4 "2021-08-10T02:53:20Z")

</div>

Let me put an example in here ...

My Index Settings :

```auto
{
  "myindex-2020.02.19" : {
    "settings" : {
      "index" : {
        "codec" : "best_compression",
        "routing" : {
          "allocation" : {
            "require" : {
              "box_type" : "warm"
            }
          }
        },
        "number_of_shards" : "5",
        "blocks" : {
          "read_only_allow_delete" : "true"
        },
        "provided_name" : "myindex-2020.02.19",
        "creation_date" : "1628563570323",
        "number_of_replicas" : "1",
        "uuid" : "DmhmKaqnS1mjfBs5fpNX7Q",
        "version" : {
          "created" : "7080099"
        }
      }
    }
  }
}

```

Now I am changing particualr settings only :

```auto
curl -X PUT "localhost:9200/myindex-2020.02.19/_settings?pretty" -H 'Content-Type: application/json' -d'
{
    "index" : {
        "refresh_interval" : "-1",
        "number_of_replicas" : 0
    }
}' -u elastic

{
  "acknowledged" : true
}

```

Now see the setting of READ ONLY is gone ...

```auto
curl -XGET "localhost:9200/myindex-2020.02.19/_settings?pretty" -u elastic
{
  "myindex-2020.02.19" : {
    "settings" : {
      "index" : {
        "codec" : "best_compression",
        "routing" : {
          "allocation" : {
            "require" : {
              "box_type" : "warm"
            }
          }
        },
        "refresh_interval" : "-1",
        "number_of_shards" : "5",
        "provided_name" : "myindex-2020.02.19",
        "creation_date" : "1628563570323",
        "number_of_replicas" : "0",
        "uuid" : "DmhmKaqnS1mjfBs5fpNX7Q",
        "version" : {
          "created" : "7080099"
        }
      }
    }
  }
}

```

---

<div class="post-metadata">

**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\
**Post date:** [August 10, 2021, 4:11am UTC](https://discuss.elastic.co/t/elasticsearch-read-only-indices/280837/5 "2021-08-10T04:11:02Z")

</div>

Quoting those docs again with emphasis added:

> [@DavidTurner](#):
>
> Elasticsearch adds **and removes** the read-only index block automatically

This looks like the expected behaviour to me.

---

<div class="post-metadata">

**Author:** ![tusharnemade](https://avatars.discourse-cdn.com/v4/letter/t/67e7ee/32.png) [@tusharnemade](https://discuss.elastic.co/u/tusharnemade)\
**Post date:** [August 10, 2021, 4:22am UTC](https://discuss.elastic.co/t/elasticsearch-read-only-indices/280837/6 "2021-08-10T04:22:44Z")

</div>

So its like whenever we change Index settings , its likely and expected that READ ONLY settings would be removed .. irrespective of DISK UTILIZATION issue...

That is that you are Emphasising ?

---

<div class="post-metadata">

**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\
**Post date:** [August 10, 2021, 6:55am UTC](https://discuss.elastic.co/t/elasticsearch-read-only-indices/280837/7 "2021-08-10T06:55:25Z")

</div>

Yes that's right.

---

<div class="post-metadata">

**Author:** ![tusharnemade](https://avatars.discourse-cdn.com/v4/letter/t/67e7ee/32.png) [@tusharnemade](https://discuss.elastic.co/u/tusharnemade)\
**Post date:** [August 10, 2021, 7:36am UTC](https://discuss.elastic.co/t/elasticsearch-read-only-indices/280837/8 "2021-08-10T07:36:06Z")

</div>

Thank You @DavidTurner

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [September 7, 2021, 7:36am UTC](https://discuss.elastic.co/t/elasticsearch-read-only-indices/280837/9 "2021-09-07T07:36:53Z")

</div>

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