# Group Repository blob

**URL:** https://community.sonatype.com/t/group-repository-blob/1528
**Category:** Sonatype Nexus Repository
**Created:** [March 29, 2019, 4:15pm UTC](https://community.sonatype.com/t/group-repository-blob/1528 "2019-03-29T16:15:27Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![Joseph](https://avatars.discourse-cdn.com/v4/letter/j/dc4da7/32.png) [@Joseph](https://community.sonatype.com/u/Joseph)
#### Post date: [March 29, 2019, 4:15pm UTC](https://community.sonatype.com/t/group-repository-blob/1528/1 "2019-03-29T16:15:27Z")

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Hi,

Would like to understand the need to assign a blob in group repository.

Say I have the following blob store and repository.

**Blob Store** : mvn, mvn-group  
**Repository** : maven-proxy, maven-hosted, maven-group

`maven-group` is setup to contain both `maven-proxy` and `maven-hosted`.

Both `maven-proxy` and `hosted blob` store are assigned to **mvn**. And `maven-group` is assigned to **mvn-group**.

A gradle Java project point to the `maven-group` URL. So whenever a project build is triggered, nexus will store a cache (copy) of the artifact (.jar) in **mvn** blob store which is inside the directory `\blobs\mvn`. Hence, in this case, when will `mvn-group` blob store be populated or used?

Since the download will actually proxy through the `maven-proxy` and store in **mvn** blob store. So I was thinking what is the use of specifying the group blob store.

Hope I am making myself clear, let me know if I didn’t. Or maybe I understand wrongly how it is supposed to work.

Thanks.

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### Author: ![jtom](https://yyz1.discourse-cdn.com/flex047/user_avatar/community.sonatype.com/jtom/32/68_2.png) [@jtom](https://community.sonatype.com/u/jtom)
#### Post date: [April 1, 2019, 6:21pm UTC](https://community.sonatype.com/t/group-repository-blob/1528/2 "2019-04-01T18:21:11Z")

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This is a good question and my colleagues may know more but I do know that some metadata combines to be shared via the group so that is at least one answer to your question.  
There may be others.  
Hope that helps,  
Joe

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### Author: ![Joseph](https://avatars.discourse-cdn.com/v4/letter/j/dc4da7/32.png) [@Joseph](https://community.sonatype.com/u/Joseph)
#### Post date: [April 2, 2019, 3:49pm UTC](https://community.sonatype.com/t/group-repository-blob/1528/3 "2019-04-02T15:49:36Z")

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Thanks, jtom.

Hope to get more clarify on this, if anyone knows more.