# Does the hot backup function back up data written during backup

**URL:** <https://forums.percona.com/t/does-the-hot-backup-function-back-up-data-written-during-backup/15131>\
**Category:** Percona Server for MongoDB\
**Created:** [April 7, 2022, 8:11am UTC](https://forums.percona.com/t/does-the-hot-backup-function-back-up-data-written-during-backup/15131 "2022-04-07T08:11:58Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![zengwb](https://avatars.discourse-cdn.com/v4/letter/z/49beb7/32.png) [@zengwb](https://forums.percona.com/u/zengwb)\
**Post date:** [April 7, 2022, 8:11am UTC](https://forums.percona.com/t/does-the-hot-backup-function-back-up-data-written-during-backup/15131/1 "2022-04-07T08:11:58Z")

</div>

Does the hot backup function back up data written during backup

---

<div class="post-metadata">

**Author:** ![Igor\_Solodovnikov](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/igor_solodovnikov/32/1265_2.png) [@Igor\_Solodovnikov](https://forums.percona.com/u/Igor_Solodovnikov)\
**Post date:** [April 8, 2022, 8:05am UTC](https://forums.percona.com/t/does-the-hot-backup-function-back-up-data-written-during-backup/15131/2 "2022-04-08T08:05:05Z")

</div>

Hello, @zengwb

Few days ago we updated our documentation page for [hot backup](https://docs.percona.com/percona-server-for-mongodb/latest/hot-backup.html). One of the changes is related to your question. Here is quote of the new text from that page:

> The backup taken is the snapshot of the `mongod` server’s `dataDir` at the moment of the `createBackup` command start.

So the answer to your question is “no, it doesn’t”.

---

<div class="post-metadata">

**Author:** ![zengwb](https://avatars.discourse-cdn.com/v4/letter/z/49beb7/32.png) [@zengwb](https://forums.percona.com/u/zengwb)\
**Post date:** [April 8, 2022, 8:42am UTC](https://forums.percona.com/t/does-the-hot-backup-function-back-up-data-written-during-backup/15131/3 "2022-04-08T08:42:52Z")

</div>

Thank you very much 😀