Comparison: GreenPlum vs Redis

Modified date: Monday, June 30, 2025

Table of Contents

Introduction
General
Data Types
SQL
Storage and System
Benchmarking
Tools
Export Regulations
Internal
Internal - Optimizer
Internal - Runtime
Internal - Storage Engine

General

Feature	GreenPlum	Redis	Definition
intro	Tanzu Greenplum is a data warehouse, analytics and AI platform that allows you to unify all your data, transforming it into actionable insights and maintaining a single source of truth	Redis (REmote DIctionary Server) is an open source, in-memory, NoSQL key/value store that is used primarily as an application cache or quick-response database.	in their own words - but I reserved the rights to remove some bold claims like "the best", unless it is widely recognized.
vendor	VMWare	Redis
initial release	2005	2009
latested version	7	8	We don't put a release date here as the software is patching frequently. So tracking it is not much useful.
supported platforms	Linux VMWare later acquired by Broadcom.	RHEL, Ubuntu, Amazon Linux Here is the Redis Enterprise version. The open source one shall be runnable on *BSD, Linux, MacOS.	supported OS/CPU platforms
db-engines ranking	48	7	ranks from https://db-engines.com/en/ranking (06/25)
relational?	yes	no	Is it a relational database? (1) Most database are actually with some extensions, for example, nested data types, graph support, etc, which we usually called "multi-model". (2) Some of them are product family, meaning they have more than one database. Here we focus on the main one but explain others when needed.
open source?	yes (archieved)	yes/no	mainly the engine code
license	Apache It is dual licensed. The archieved version (up to 05/24/24) is Apache. The commercial one is named Tanzu Greenplum by VMWare/BroadCom.	Tri-licensing model Starting with Redis 8, Redis Open Source is moving to a tri-licensing model with all new Redis code contributions governed by the updated Redis Software Grant and Contributor License Agreement. After this release, contributions are subject to your choice of: (a) the Redis Source Available License v2 (RSALv2);or (b) the Server Side Public License v1 (SSPLv1); or (c) the GNU Affero General Public License v3 (AGPLv3). Redis Open Source 7.2 and prior releases remain subject to the BSDv3 clause license.
cloud offering	cloud vendors	Redis Cloud
technical doc	https://techdocs.broadcom.com/us/en/vmware-tanzu/data-solutions/tanzu-greenplum/7.html	https://redis.io/docs/latest/
on-premise offering		yes	if no means you can't buy "box" software from them

SQL

Feature	GreenPlum	Redis	Definition
base	PostgreSQL
SQL: standard complaince	high	No SQL
max SQL length	undefined same as PostgreSQL with "StringInfo" container		maximal SQL statement length
PL: main	SQL + PL/PgSQL		main programming lanage: most database suports SQL because SQL is a well established standard. However, each database would like to extend SQL more or less.
PL: other language support	yes		PL lanaguage other than PL/SQL, like PL/Java, PL/Rust etc
SP: max parameters	100
UDF: max parameters	100
SQL: max parameters	65535		number of parameters in a PREPARED query
SQL: query hints	GUC only		if it allows use query hints to guide the optimizer
SQL: explicit locking	yes: row, page, table level		Locking is usually an internal matter - so does it allow explicit locking? What levels do they support?
Triggers?	yes		If support triggers
Triggers: scope	tables, views, foreign tables		What objects can have triggers
Triggers: type	BEFORE, AFTER, INSTEAD OF		Types of triggers supported
Object-Relational?	yes
Extension Mechanism	C programming, link with engine	Redis Modules API
vector search	no native		does it support vector search
SQL: extensions		There are multiple open source projects to add SQL support on top of Redis. For example, RediSQL.

Storage and System

Feature	GreenPlum	Redis	Definition
arch: server	C/S	C/S	Embedded or traditional C/S?
arch: run in browser?	no	no	It also known as a client-side database, is a database that is stored and managed within a user's web browser, rather than on a remote server.
arch: in-memory support	no
arch: Multi-master support?	yes		if multi-master support?
	GreenPlum is based on PostgreSQL with massive OLAP processing enhancement: so MPP is its choice architecture.
replication: sync/async	both		Can commits wait or w/o wait for replicas to acknowledge
replication: WAL shipping	yes		Uses write-ahead log (WAL) shipping for replication
replication: quorum-based commit	no		Multiple synchronous replicas with quorum for commit
ACID: durability		yes
Materialized View: support?		no

Benchmarking

Feature	GreenPlum	Redis	Definition
any official TPC benchmarks?	no	no	The TPC benchmark includes a set of tests simulating real-world scenarios to evaluate database performance.

Tools

Feature	GreenPlum	Redis	Definition
command line client	psql	redis-cli	it means "sql client" for database supporting SQL. For embedded atabase, the client includes the server together.

Export Regulations

Feature	GreenPlum	Redis	Definition
Jurisdiction	US	US	Which country controls export
ECCN	None/5D992	None	An Export Control Classification Number (ECCN) is a five-character alphanumeric code used to categorize items on the Commerce Control List (CCL) for export control purposes. Most database may fall into 5D992.c category, "mass market encryption", which means it has some ordinary encryption related code, for example, the SSL connection code.
Eligible License Exception / CCATS	Not required/ The open source license does not require a ECCN but the Tanzu commerical one needs 5D992.	Not required There is no ECCN for open source software	A License Exception is an authorization that allows you to export or reexport items subject to the EAR without needing to obtain a specific export license, provided certain conditions are met. CCATS stands for Commodity Classification Automated Tracking System. The BIS assigns a CCATS number to products that it has classified under the Commerce Control List (CCL).
Encryption Components	SSL	SSL	Crypto functionality that triggers control

Internal

Feature	GreenPlum	Redis	Definition
concurrency control	MVCC
MVCC: implemented?	yes		if implement MVCC for concurrency control
Implementation language	C/C++ The PostgreSQL base code is in pure C but the extended part, including the GPOS, GPOrac(optimizer) are in C++.		A DBMS may use mulitple programming languages, for example, supports its stored procedure. The major programming language used to implement the engine.

Internal - Optimizer

Feature	GreenPlum	Redis	Definition
CBO?	yes		if it employees a cost based optimizer
framework	Cascades		System-R is more like a dynamic programming, bottom up optimizer, while Cascades/Volcano gebaseerd optimizer is more like top-down optimizer.
plan guide?	no		Can we use plan guide to correct the plan? This is a more systematic and accurate way to repair the plan than plan hints. Especially during system upgrades, if the plan becomes worse, we can use plan guide to force a query to use a previous plan.

Internal - Runtime

Feature	GreenPlum	Redis	Definition
resource management	simple: work_mem controls per-operator memory use		How execution memory is allocated and limited.
spilling support	yes		"spilling" refers to the process of writing temporary data or intermediate results of a query to disk when the available memory is exhausted. This is crucial for handling large datasets or complex queries that require more memory than available.
model	Volcano + push for parallel and distributed run		The operator scheduling model: pull-gebaseerd (Volcano), push etc.
support intra-parallel query?	no		meaning a single query can utilize multi hardware threads to run it
adaptive execution (AQP)?	no		Traditionally, after the optimizer determines the plan, the runtime must execute it completely without any room for adjustment, such as which of the two tables should be built. The adaptive method allows the runtime to make some adjustments based on the actual situation, and the optimizer must also prepare for this uncertainty, such as preparing an alternative plan.
Error: out-of-range and overflow	abort the transaction		To maintain atomic requirement of ACID, database engine usually fail the statement and abort the transaction.