VMware Tanzu Greenplum Review

Processing speed of queries used for ‘Reporting’ solutions is the most valuable feature.

Valuable Features:

Processing speed of queries used for ‘Reporting’ solutions is the most valuable feature.

Improvements to My Organization:

Not Applicable for the area I was responsible for, as we ended up migrating away from Greenplum.

Room for Improvement:

Stability and scalability for large number of concurrent applications & their users. The results we got were very inconsistent, depending on number of connections taken up by multiple applications and users.

When our application was first deployed using Greenplum, the number of users of the rrack on which Greenplum was deployed was very limited. We got excellent query performance results at that time. But as more applications started getting deployed, we started getting very inconsistent performance results. Sometimes the queries would run in sub-seconds, and sometimes same queries would run 10 times longer. The reason we found this was that Greenplum limits the number of active concurrent connections. Once all connections are being used, any new query gets queued, and thus response time suffers.

The impression we got was that the EMC Sales team that sold Greenplum to the organization did a great job. But later on the ball was dropped when it came to educating on which type of applications are suitable to Greenplum , and how to configure it to get optimal performance. When Pivotal took over support of Greenplum, their consultant visited us to go over the issues we were having. He advised us that Greenplum is not the best environment for our application needs. We ended up migrating our application out of Greenplum, along with a few other applications.

Deployment Issues:

There was no issue with the deployment.

Stability Issues:

There were issues with the stability.

Scalability Issues:

There were issues with the scalability.

Other Advice:

Ensure that this is the right tool for your needs. For instance, Greenplum is not the best tool for cases where data has to be kept up to date in real time. Capacity planning is key to success, once you do decide it is the right tool for you.

**Disclosure: I am a real user, and this review is based on my own experience and opinions.
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