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Remember when there were just two or three cloud computing platforms to choose from, and just about as many cloud databases? Well, as clouds have proliferated, so have the database services built on top of them. In fact, it’s getting hard to keep up with what’s actually available.
Here’s a primer highlighting the available services (note, we’re talking managed database services, not database instances that users still need to manage and administer) and where they’re running. It’s intended to be thorough, but that can be easier said than done, so please note any omissions in the comments.
- Amazon Relational Database Service: One of the first cloud database services, Amazon Web Services’ RDS is now one of the most complete, too. Like most AWS (s amzn) services, it’s tied into the AWS management interface and is compatible with a large majority of AWS’s countless other cloud computing services. Initially just an AWS-hosted and -managed MySQL service, RDS now lets users choose Microsoft SQL Server and Oracle Database, as well.
- Clustrix Database as a Service: Database vendor Clustrix just got into the cloud game on Wednesday, but it came to play. Its service, which runs on the Rackspace Cloud, gives users the high performance of solid-state drives, the peace of mind of single-tenant deployment, and the scalable MySQL capabilities of its flagship on-premise product. The company claims it’s suitable for both OLTP and OLAP applications, and that it monitors system health across more than 2,500 metrics.
- EnterpriseDB Postgres Plus Cloud Database: EnterpriseDB is the primary company commercializing the PostgreSQL database, and this is the cloud-based version of its flagship Postgres Plus offering. Targeting enterprise developers more than weekend hackers, Postgres Plus Cloud includes features such as high-availability clusters, high connection counts and compatibility with Oracle environments.
- FathomDB: Some GigaOM readers might remember FathomDB as the partner that was supposed to give Rackspace a chance to compete against AWS’s then-new RDS. Well, times have changed. FathomDB still exists, but it has open-sourced its original technology to help developers build anything as a service and currently isn’t offering a hosted database service. However, the company claims to be working on a next-generation database service, so stay tuned.
- Google Cloud SQL: It’s not the most feature-rich database around, but Google Cloud SQL does have its benefits. For one, it’s integrated with the rest of Google’s cloud services for easy interaction. And, as is Google’s (s goog) claim to fame in the cloud, Cloud SQL is geographically replicated for maximum availability. Currently, though, it only supports Java and Python applications, and instances are limited to 10GB in storage capacity.
- Heroku Postgres: Heroku Postgres is the public-facing implementation of platform-as-a-service darling Heroku’s (s crm) internal PostgreSQL database. It’s designed for reliability and data protection — Heroku claims 99.99 percent uptime and a design targeted to hit 99.999999999 percent data durability — and tries to bring the Heroku experience to developers that can’t use its PaaS offering. One of its more interesting features is called Data Clips, which lets users send the results of a SQL query to someone else via a URL.
- HP Cloud Relational Database for MySQL: What is there to say about this service that the name doesn’t already? For starters, it’s presently in private beta, so there’s still a lot of work to be done and a lot of features to be added. It’s also built atop an OpenStack-based MySQL distribution, which, in theory, should make it easier to move one’s database business from cloud to cloud if need be.
- IBM SmartCloud Application Services: Like HP (s hpq), IBM’s (s ibm) cloud database is still very much a work in progress. Details on specific features are sparse right now, other than that the service is based on IBM’s DB2 Server technology and is part of the SmartCloud Application Services (read “PaaS”) offering that’s currently in a pilot phase.
- Microsoft SQL Database: Formerly known as SQL Azure, SQL Database is a critical component of Microsoft’s (s msft) new focus on hybrid cloud computing. Yes, it can operate as a standalone cloud database, but it also provides a shared user experience with Microsoft SQL Server and allows for data sharing with on-premise SQL Server databases. There’s also an option for syncing between other SQL Database deployments elsewhere within a company’s cloud infrastructure.
- Oracle Database Cloud Service: It’s not for everyone, but existing Oracle database users that want a cloud-hosted option certainly should appreciate the Oracle Database Cloud Service. After all, it claims all the features and performance of Oracle Database 11g Release 2, of which there are a lot. Pricing isn’t made clear, but it’s a monthly rate based on the size of your database, although there are no long-term contracts.
- Rackspace Cloud Databases: The latest addition to Rackspace’s (s rax) line of cloud offerings, Cloud Databases is first built from its inception atop the OpenStack platform. Still in early access mode, users won’t get SLAs or a host of features (such as monitoring, backups or a GUI) that are slated for the GA edition, but they will get promises of high performance and reliability thanks to the service’s container-based virtualization and storage-area network-based architecture.
- Xeround: Save for Amazon RDS, Xeround might be the most-popular cloud database around. It’s also the most flexible in terms of where it can be deployed — the MySQL service can run atop pretty much any public cloud, including AWS, Rackspace, Joyent, Heroku … you get the picture. Xeround claims auto-scaling as one of its primary strengths and is architecturally unique in that it’s essentially a MySQL frontend atop a foundation that theoretically could support a variety of database options.
- Amazon DynamoDB: DynamoDB is AWS’s managed NoSQL service based upon the original Dynamo kay-value data store the company developed years ago for its internal purposes. Designed for web or big data applications needing fast access to data and potentially having to scale in a hurry, DynamoDB is built atop an SSD architecture and scales automatically as data is added to the system.
- Amazon ElastiCache: It’s not technically a NoSQL service, but ElastiCache does fulfill a similar need by giving developers managed Memcached to make sure their MySQL deployments are serving user data as fast as possible. Memcached is used by many web applications, including Facebook (s fb), that are built upon disk-based relational databases but want to keep certain data in an in-memory cache.
- Cloudant: Although it’s based on the open source CouchDB database, Cloudant doesn’t call itself a NoSQL service per se, but rather a Data Layer. Built across a collection of cloud-provider resources spanning the globe, it does offer a predictable scalable NoSQL data store, but also a built-in MapReduce analytics engine. That’s one reason agribusiness giant Monsanto uses Cloudant to underpin its genomics infrastructure.
- Database.com: Salesforce.com’s standalone database service, Database.com, isn’t exactly NoSQL, but it isn’t exactly a relational database, either. What it is for sure is the same multitenant database architecture that has been underneath Salesforce.com’s CRM service and Force.com platform for years. It stores a variety of data types, including of the unstructured variety, and is designed for (although not limited to) applications tying into existing Salesforce.com services.
- Microsoft Windows Azure Table Storage: This is the NoSQL data store for Windows Azure, which is designed for easily querying terabytes of non-relational data. Because it’s part of the overall Windows Azure Storage family, though, total database size is limited to 100TB overall (Blob, Table and Queue storage) per account.
- MongoHQ/MongoLab: MongoDB is by far the most-popular NoSQL database around, but it can be a bear to manage in the cloud. As a result, there are numerous hosted MongoDB services around, although MongoHQ and MongoLab are probably the most widely known. The pitch for both is simple: fast deployment, thorough monitoring and reliability you probably can’t achieve yourself. Both services try to appeal to a broad range of users with both shared and dedicated offerings.
Feature image courtesy of Shutterstock user Oleksly Mark.