HailDB is a relational database that is embeddable within applications. You embed HailDB by linking to a shared library and calling a clean and simple API. HailDB is a continuation of the Embedded InnoDB project. It is not itself a database server, but is a library implementing the storage layer. With the addition of the HailDB plugin to Drizzle you get a full SQL interface.
Q: Why name it HailDB?
A: Hail comes from clouds.
Q: No, really?
A: Hail is solid. (we also wish to have some distinction from InnoDB and avoid any even remote possibility of trademark issues).
Q: Why exist at all?
A: InnoDB development is currently a rather closed process with code only seeing the outside world every 4 to 7 months. We work on a much faster schedule and want to be able to incorporate fixes and use them in Drizzle on a much shorter timeframe.
Q: Are HailDB changes going back to Embedded InnoDB?
A: It is not in our interest to diverge a lot from the upstream project as that creates more work for us.
Q: Is this a reaction to Embedded InnoDB being “under review” and lagging behind InnoDB Plugin ?
Q: Does the InnoDB team know that we’re doing this?
A: Yes, we’ve spoken to some people on the InnoDB team at Oracle.
Q: Are you compiling with all compiler warnings?
A: We use pandora-build, and get all compiler warnings. There are a lot of them.
Q: What are your plans?
A: In the short term we see improvements in the performance and capability of the Embedded InnoDB API, improvements in the build system, integration of XtraBackup and packaging.
We are working on a Storage Engine for Drizzle that speaks the HailDB API. This will be as performant and featureful as the current Innobase plugin in Drizzle.
Q: Where can I get it?
A: Development is done through HailDB on Launchpad.
Q: Is it a company?
No. It’s a free and open source software project