---
title: stack es ccr follow cli command
description: Create a follower. Behaviour flags: --dry-run — validate all inputs and exit without performing any action 
url: https://www.elastic.co/elastic/docs-builder/docs/4097/reference/elastic-cli/cli/stack/es/ccr/follow
applies_to:
  - Elastic Cloud Serverless: Preview
  - Elastic Stack: Preview
---

# stack es ccr follow cli command
<cli-modifiers>
</cli-modifiers>

```bash
elastic stack es ccr follow \
  --leader-index <leader-index> \
  --remote-cluster <remote-cluster> \
  --index <index> \
  [options]
```

Create a follower.
**Behaviour flags:**
`--dry-run` — validate all inputs and exit without performing any action

## Options

<definitions>
  <definition term="--leader-index string required">
    The name of the index in the leader cluster to follow.
  </definition>
  <definition term="--remote-cluster string required">
    The remote cluster containing the leader index.
  </definition>
  <definition term="--index string required">
    The name of the follower index.
  </definition>
  <definition term="--master-timeout string">
    Period to wait for a connection to the master node.
  </definition>
  <definition term="--wait-for-active-shards string">
    Specifies the number of shards to wait on being active before responding. This defaults to waiting on none of the shards to be
    active.
    A shard must be restored from the leader index before being active. Restoring a follower shard requires transferring all the
    remote Lucene segment files to the follower index.
  </definition>
  <definition term="--data-stream-name string">
    If the leader index is part of a data stream, the name to which the local data stream for the followed index should be renamed.
  </definition>
  <definition term="--max-outstanding-read-requests number">
    The maximum number of outstanding reads requests from the remote cluster.
  </definition>
  <definition term="--max-outstanding-write-requests number">
    The maximum number of outstanding write requests on the follower.
  </definition>
  <definition term="--max-read-request-operation-count number">
    The maximum number of operations to pull per read from the remote cluster.
  </definition>
  <definition term="--max-read-request-size string">
    The maximum size in bytes of per read of a batch of operations pulled from the remote cluster.
  </definition>
  <definition term="--max-retry-delay string">
    The maximum time to wait before retrying an operation that failed exceptionally. An exponential backoff strategy is employed when
    retrying.
  </definition>
  <definition term="--max-write-buffer-count number">
    The maximum number of operations that can be queued for writing. When this limit is reached, reads from the remote cluster will be
    deferred until the number of queued operations goes below the limit.
  </definition>
  <definition term="--max-write-buffer-size string">
    The maximum total bytes of operations that can be queued for writing. When this limit is reached, reads from the remote cluster will
    be deferred until the total bytes of queued operations goes below the limit.
  </definition>
  <definition term="--max-write-request-operation-count number">
    The maximum number of operations per bulk write request executed on the follower.
  </definition>
  <definition term="--max-write-request-size string">
    The maximum total bytes of operations per bulk write request executed on the follower.
  </definition>
  <definition term="--read-poll-timeout string">
    The maximum time to wait for new operations on the remote cluster when the follower index is synchronized with the leader index.
    When the timeout has elapsed, the poll for operations will return to the follower so that it can update some statistics.
    Then the follower will immediately attempt to read from the leader again.
  </definition>
  <definition term="--settings string">
    Settings to override from the leader index.
  </definition>
  <definition term="--error-trace">
    When set to `true` Elasticsearch will include the full stack trace of errors
    when they occur.
  </definition>
  <definition term="--filter-path string">
    Comma-separated list of filters in dot notation which reduce the response
    returned by Elasticsearch.
    **Repeatable:** pass `--filter-path` multiple times to supply more than one value
  </definition>
  <definition term="--human">
    When set to `true` will return statistics in a format suitable for humans.
    For example `"exists_time": "1h"` for humans and
    `"exists_time_in_millis": 3600000` for computers. When disabled the human
    readable values will be omitted. This makes sense for responses being consumed
    only by machines.
  </definition>
  <definition term="--pretty">
    If set to `true` the returned JSON will be "pretty-formatted". Only use
    this option for debugging only.
  </definition>
  <definition term="--input-file string">
    path to a JSON file to use as command input
  </definition>
  <definition term="--dry-run">
    validate all inputs and exit without performing any action (preview changes without applying them)
  </definition>
</definitions>


## Global Options

<definitions>
  <definition term="--json">
    output as JSON
  </definition>
</definitions>