# Will turnning allow\_primary on delete the exist shard?
**URL:** https://discuss.elastic.co/t/will-turnning-allow-primary-on-delete-the-exist-shard/23053
**Category:** Elasticsearch
**Created:** [April 2, 2015, 3:39am UTC](https://discuss.elastic.co/t/will-turnning-allow-primary-on-delete-the-exist-shard/23053 "2015-04-02T03:39:09Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@yang\_2](https://discuss.elastic.co/u/yang_2)
#### Post date: [April 2, 2015, 3:39am UTC](https://discuss.elastic.co/t/will-turnning-allow-primary-on-delete-the-exist-shard/23053/1 "2015-04-02T03:39:09Z")
Hi,
We had some outage wiht ES cluster. So that we cutoff the incomming and
outgoing traffic to/from ES cluster.
but we see lots of unassigned shards and get get them allocated
automatically.
Question is, will tuning allow\_primary flag on when manually allocating the
shards delete the existing data?
I did so, and saw those shards immediately became available with size 0b.
THanks,
Yang
--
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/7ebd6baf-dd5b-40db-8894-a203b9607e8a%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/7ebd6baf-dd5b-40db-8894-a203b9607e8a%40googlegroups.com).
For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout).
---
### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [April 2, 2015, 3:55am UTC](https://discuss.elastic.co/t/will-turnning-allow-primary-on-delete-the-exist-shard/23053/2 "2015-04-02T03:55:25Z")
The docs mention this is a possibility -
> **[Cluster reroute API | Elasticsearch Guide \[8.11\] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-reroute.html)**
allocate
Allocate an unassigned shard to a node. Accepts the index and shard for
index name and shard number, and node to allocate the shard to. It also
accepts allow\_primary flag to explicitly specify that it is allowed to
explicitly allocate a primary shard (might result in data loss).
On 2 April 2015 at 14:39, [yang@getblueshift.com](mailto:yang@getblueshift.com) wrote:
> Hi,
>
> We had some outage wiht ES cluster. So that we cutoff the incomming and
> outgoing traffic to/from ES cluster.
>
> but we see lots of unassigned shards and get get them allocated
> automatically.
>
> Question is, will tuning allow\_primary flag on when manually allocating
> the shards delete the existing data?
> I did so, and saw those shards immediately became available with size 0b.
>
> THanks,
> Yang
>
> --
> 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/7ebd6baf-dd5b-40db-8894-a203b9607e8a%40googlegroups.com](https://groups.google.com/d/msgid/elasticsearch/7ebd6baf-dd5b-40db-8894-a203b9607e8a%40googlegroups.com)
> [https://groups.google.com/d/msgid/elasticsearch/7ebd6baf-dd5b-40db-8894-a203b9607e8a%40googlegroups.com?utm\_medium=email&utm\_source=footer](https://groups.google.com/d/msgid/elasticsearch/7ebd6baf-dd5b-40db-8894-a203b9607e8a%40googlegroups.com?utm_medium=email&utm_source=footer)
> .
> For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout).
--
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/CAEYi1X8jTTpObh0B6KCDLoyhtgFMtxNeM4kscAjFbwkYTOU1AQ%40mail.gmail.com](https://groups.google.com/d/msgid/elasticsearch/CAEYi1X8jTTpObh0B6KCDLoyhtgFMtxNeM4kscAjFbwkYTOU1AQ%40mail.gmail.com).
For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout).
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 12:22am UTC](https://discuss.elastic.co/t/will-turnning-allow-primary-on-delete-the-exist-shard/23053/3 "2017-07-06T00:22:07Z")