# Reflection error

**URL:** <https://community.dremio.com/t/reflection-error/11836>\
**Category:** Uncategorized\
**Created:** [May 15, 2024, 5:26pm UTC](https://community.dremio.com/t/reflection-error/11836 "2024-05-15T17:26:01Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![denis](https://avatars.discourse-cdn.com/v4/letter/d/5e9695/32.png) [@denis](https://community.dremio.com/u/denis)\
**Post date:** [May 15, 2024, 5:26pm UTC](https://community.dremio.com/t/reflection-error/11836/1 "2024-05-15T17:26:01Z")

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HI im new to Dremio and wanted to test reflections.  
I do always get the error massage “Reflection cannot accelerate. refresh job attempts failed […]”

I am using dremio community version with Docker

is there something i am missing or doing wrong?

- I’ve tried reflections on the Dremio sample Data and on Data from MS SQL Server, but with noch success

 ![image](https://us1.discourse-cdn.com/flex020/uploads/dremio/original/2X/0/009fed2c23490374fa51c9bb60ed56c7e6efc610.png)

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**Author:** ![Benny\_Chow](https://sea2.discourse-cdn.com/flex020/user_avatar/community.dremio.com/benny_chow/32/5527_2.png) [@Benny\_Chow](https://community.dremio.com/u/Benny_Chow)\
**Post date:** [May 16, 2024, 3:08am UTC](https://community.dremio.com/t/reflection-error/11836/2 "2024-05-16T03:08:16Z")

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You can click on the history link and find the REFRESH REFLECTION job. This is the job that creates the materialization. If you are using CE Docker, then most likely you haven’t setup a distributed filesystem to store the actual Parquet files and Iceberg metadata.

See [Configuring Distributed Storage | Dremio Documentation](https://docs.dremio.com/current/get-started/cluster-deployments/customizing-configuration/dremio-conf/dist-store-config/)

If you are just playing around with Dremio, setting up NAS storage is a good way to start.

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<div class="post-metadata">

**Author:** ![denis](https://avatars.discourse-cdn.com/v4/letter/d/5e9695/32.png) [@denis](https://community.dremio.com/u/denis)\
**Post date:** [May 17, 2024, 2:57pm UTC](https://community.dremio.com/t/reflection-error/11836/3 "2024-05-17T14:57:31Z")

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HI, thanks for the quick response.  
Is there any other option? Maybe store the data locally on my pc?  
I dont really have the setup for NAS storage.  
The sample Database i work with is relative small in size (around 200k data entries)

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<div class="post-metadata">

**Author:** ![Benny\_Chow](https://sea2.discourse-cdn.com/flex020/user_avatar/community.dremio.com/benny_chow/32/5527_2.png) [@Benny\_Chow](https://community.dremio.com/u/Benny_Chow)\
**Post date:** [May 17, 2024, 9:06pm UTC](https://community.dremio.com/t/reflection-error/11836/4 "2024-05-17T21:06:52Z")

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The filesystem on your local PC can be the NAS storage. There’s no setup involved.

In dremio.conf, do something like this:

```auto
paths: {
  # the local path for dremio to store data.
  local: "/Users/bennychow/dev/dremioData/data"

  # the distributed path Dremio data including job results, downloads, uploads, etc
  dist: "file:///Users/bennychow/dev/dremioData/pdfs"}

```

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<div class="post-metadata">

**Author:** ![ilvenini](https://sea2.discourse-cdn.com/flex020/user_avatar/community.dremio.com/ilvenini/32/5976_2.png) [@ilvenini](https://community.dremio.com/u/ilvenini)\
**Post date:** [September 26, 2024, 5:32am UTC](https://community.dremio.com/t/reflection-error/11836/5 "2024-09-26T05:32:14Z")

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Thanks Benny, it works perfectly!