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MR3

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This Google Group is about MR3, Hive on MR3, and Spark on MR3.

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Jul 2

MR3 2.1 released

MR3 2.1 has been released. For the result of performance evaluation, please see our new blog article:

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MR3 2.1 released

MR3 2.1 has been released. For the result of performance evaluation, please see our new blog article:

Jul 2

David Engel, Sungwoo Park2

Jun 19

hive.aux.jars.path

In the current implementation, Hive-MR3-K8s does not use hive.aux.jars.path (disallowed) and hive.mr3

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hive.aux.jars.path

In the current implementation, Hive-MR3-K8s does not use hive.aux.jars.path (disallowed) and hive.mr3

Jun 19

David Engel, … Sungwoo Park5

Jun 19

Iceberg compaction with external, MySQL Metastore

It seems that all these issues are due to the Jar file missing in the classpath. I will try to fix

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Iceberg compaction with external, MySQL Metastore

It seems that all these issues are due to the Jar file missing in the classpath. I will try to fix

Jun 19

David Engel, … Ill5

Jun 19

Problem with collect_set()

Does hive4.0.1 on mr3-1.12 have the same issue? On Fri, Apr 18, 2025 at 2:48 AM David Engel <david

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Problem with collect_set()

Does hive4.0.1 on mr3-1.12 have the same issue? On Fri, Apr 18, 2025 at 2:48 AM David Engel <david

Jun 19

David Engel, Sungwoo Park2

Jun 11

Apache Superset and MR3 2.x

Hi David, If you use the plain shell scripts, you cannot directly use the Superset image that we

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Apache Superset and MR3 2.x

Hi David, If you use the plain shell scripts, you cannot directly use the Superset image that we

Jun 11

Jun 1

Performance of Hive-MR3 2.1

Typo: In our last benchmark, Hive-MR3 2.0: 2873 seconds vs Trino 468: 4441 seconds --> In our last

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Performance of Hive-MR3 2.1

Typo: In our last benchmark, Hive-MR3 2.0: 2873 seconds vs Trino 468: 4441 seconds --> In our last

Jun 1

David Engel, Sungwoo Park5

May 14

Large Iceberg inserts cause HDFS errors

The old page is probably what Google returned when I searched after your earlier email. It 404-ed

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Large Iceberg inserts cause HDFS errors

The old page is probably what Google returned when I searched after your earlier email. It 404-ed

May 14

federico jordán, Sungwoo Park5

May 6

Spark issues with Hive 4

Hi, I've noticed that the Hive3 branch is no longer being actively maintained. However, we still

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Spark issues with Hive 4

Hi, I've noticed that the Hive3 branch is no longer being actively maintained. However, we still

May 6

Apr 21

New blog article on MR3 2.0

https://mr3docs.datamonad.com/blog/2025-04-18-performance-evaluation-2.0 Performance Evaluation of

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New blog article on MR3 2.0

https://mr3docs.datamonad.com/blog/2025-04-18-performance-evaluation-2.0 Performance Evaluation of

Apr 21

David Engel, Sungwoo Park2

Apr 17

How to use persistent volumes in mr3worker pods

This hack continues to work. I tested it on my own cluster: WORK_DIR_PERSISTENT_VOLUME_CLAIM=workdir-

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How to use persistent volumes in mr3worker pods

This hack continues to work. I tested it on my own cluster: WORK_DIR_PERSISTENT_VOLUME_CLAIM=workdir-

Apr 17

David Engel, Sungwoo Park5

Apr 17

Workdir location

Thanks, again. I'll leave those settings alone. Without work-dir being mounted from outside, I

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Workdir location

Thanks, again. I'll leave those settings alone. Without work-dir being mounted from outside, I

Apr 17

Apr 15

In preparation for the release of MR3 2.0, we redesigned the website. https://datamonad.com/ The blog

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In preparation for the release of MR3 2.0, we redesigned the website. https://datamonad.com/ The blog

Apr 15

11/29/24

Hive-MR3 git repository

I updated the default branch of Hive-MR3 git repository to master4.0.0. master4.0.0 is based on Hive

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Hive-MR3 git repository

I updated the default branch of Hive-MR3 git repository to master4.0.0. master4.0.0 is based on Hive

11/29/24

11/14/24

Hive 4.0.1 on MR3 1.12

We have released Hive 4.0.1 on MR3 1.12. (We longer update Hive 3.1.3 on MR3.) Please check out the

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Hive 4.0.1 on MR3 1.12

We have released Hive 4.0.1 on MR3 1.12. (We longer update Hive 3.1.3 on MR3.) Please check out the

11/14/24

10/9/24

A blog article on the performance of Hive 4.0.1 on MR3 1.12

Hello, We have published a new article where we report the experimental result of running TPC-DS 10TB

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A blog article on the performance of Hive 4.0.1 on MR3 1.12

Hello, We have published a new article where we report the experimental result of running TPC-DS 10TB

10/9/24

8/3/24

MR3 1.11 Release

For the performance of Hive 4 on MR3, see this blog article: https://www.datamonad.com/post/2024-08-

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MR3 1.11 Release

For the performance of Hive 4 on MR3, see this blog article: https://www.datamonad.com/post/2024-08-

8/3/24

7/11/24

Hive 4.0.0 on MR3

We are quite close to releasing Hive 4 on MR3 1.11, along with the least release of Hive 3.1.3 on MR3

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Hive 4.0.0 on MR3

We are quite close to releasing Hive 4 on MR3 1.11, along with the least release of Hive 3.1.3 on MR3

7/11/24

Joaquim Ceballos Casals, Sungwoo Park2

6/1/24

Critial Error License has expired in MR3 Master

Could you try MR3 1.9 or MR3 1.10 Docker image for now? For MR3 1.10, there were reports of the

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Critial Error License has expired in MR3 Master

Could you try MR3 1.9 or MR3 1.10 Docker image for now? For MR3 1.10, there were reports of the

6/1/24

3/17/24

MR3 1.10 Release

Here is a quick summary of performance comparison between MR3 1.9 and MR3 1.10 on the original TPC-DS

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MR3 1.10 Release

Here is a quick summary of performance comparison between MR3 1.9 and MR3 1.10 on the original TPC-DS

3/17/24

David Engel, Sungwoo Park4

2/27/24

Error in ALTER TABLE ... CONCATENATE

1. For the NPE error, we don't have test cases other that q tests included in Hive. If you know

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Error in ALTER TABLE ... CONCATENATE

1. For the NPE error, we don't have test cases other that q tests included in Hive. If you know

2/27/24

1/10/24

Upgrade to MR3 1.9 on Kubernetes,

Hello, If you use MR3 1.7 on Kubernetes, please update mr3-run-k8s scripts and switch to MR3 1.9. The

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Upgrade to MR3 1.9 on Kubernetes,

Hello, If you use MR3 1.7 on Kubernetes, please update mr3-run-k8s scripts and switch to MR3 1.9. The

1/10/24

Sungwoo Park, David Engel3

1/9/24

I updated the mr3-run-k8s repo to fix a couple of problems: 1) Java 17 options; 2) running superset

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I updated the mr3-run-k8s repo to fix a couple of problems: 1) Java 17 options; 2) running superset

1/9/24

12/23/23

Blog article on performance tuning for BI queries,

Hello, I have published a new blog article 'Performance Tuning for Single-table Queries'. It

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Blog article on performance tuning for BI queries,

Hello, I have published a new blog article 'Performance Tuning for Single-table Queries'. It

12/23/23

12/15/23

Hive-MR3 in HiDataPlus.

Hive-MR3 is now shipped in HiDataPlus. For the latest announcement of HiDataPlus, please see: https:/

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Hive-MR3 in HiDataPlus.

Hive-MR3 is now shipped in HiDataPlus. For the latest announcement of HiDataPlus, please see: https:/

12/15/23

12/9/23

MR3 1.8 release

MR3 1.8 has been released. For changes, see the release notes: https://mr3docs.datamonad.com/docs/

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MR3 1.8 release

MR3 1.8 has been released. For changes, see the release notes: https://mr3docs.datamonad.com/docs/

12/9/23

Fiorella Piriz, … Sungwoo Park5

11/22/23

Performance issue with Hive Mr3 on kubernetes (and s3)

Is there a chance that this slow S3 access is due to the use of Avro files? For example, do you see

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Performance issue with Hive Mr3 on kubernetes (and s3)

Is there a chance that this slow S3 access is due to the use of Avro files? For example, do you see

11/22/23

11/15/23

Performance issue and Hive-MR3 with Java 17

Some users reported Hive-MR3 getting slower after running for a while. We reproduced this problem by

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Performance issue and Hive-MR3 with Java 17

Some users reported Hive-MR3 getting slower after running for a while. We reproduced this problem by

11/15/23

Ill, Sungwoo Park2

11/12/23

slow query little case

Thank you for sharing the story. I would like add that with the Tez runtime (in HDP and Hive-MR3),

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slow query little case

Thank you for sharing the story. I would like add that with the Tez runtime (in HDP and Hive-MR3),

11/12/23

11/3/23

MR3 1.8 release candidate

We have uploaded MR3 1.8 release candidate. https://github.com/mr3project/mr3-release/releases/tag/v1

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MR3 1.8 release candidate

We have uploaded MR3 1.8 release candidate. https://github.com/mr3project/mr3-release/releases/tag/v1

11/3/23

10/31/23

Fwd: Hive stuck without workers

For those interested in Hive-MR3-Celeborn (with K8s) I know we had to bump the local storage on the

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Fwd: Hive stuck without workers

For those interested in Hive-MR3-Celeborn (with K8s) I know we had to bump the local storage on the

10/31/23

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