rqlite
is a lightweight, open-source distributed relational database, with SQLite as its storage engine. v4.4.0 is now out and allows the Raft election timeout to be set.
You can download the release from GitHub.
Batching in Go
The batching of data or computation amortizing a fixed cost over multiple units — is a very common pattern in many computers systems. It’s particularly prevalent in networking and CPU memory accesses.
But the implementation of batching includes many subtleties — in particular when to wait for more data, and when to transmit what you have.
Jimmy Carter and the Failures of Management
I’m not old enough to remember Jimmy Carter in office, but I did see him speak once in 2013. With a B.Sc., and some training in nuclear power, his background was always somewhat interesting to me — particularly how someone with a technical education approached politics at the highest levels.
Continue reading Jimmy Carter and the Failures of Management
rqlite 4.3.1 released
rqlite at the Pitt CS Club
I recently had a chance to speak about rqlite, the distributed, lightweight database built on SQLite, at the University of Pittsburgh Computer Science Club. It was a good evening as I spoke about distributed systems, the problems they solve, and how rqlite uses Raft to replicate SQLite.
You can find the presentation here.
Go race detection and failing fast
Go remains one of the languages I’m most productive in. Its combination of the rigour of static typing, but fluidity of Python, makes it both robust and easy to code in.
It’s also got some innovative features that help you catch those tough-to-find issues, particularly when they only occur in production. An example is the Go Race Detector.
rqlite moved to Circle 2.0
I’ve moved continuous testing of rqlite to CircleCI 2.0. The initial work I did with hraftd was helpful, though rqlite was definitely more involved.
Testing is significantly quicker with the new, container-based, version of CircleCI, which should help noticeably with development.
Deploying Vallified on GCP
Since I recently joined Google Cloud Platform (GCP), I thought it’s time to get some practical experience with the platform. As a result I’m going to migrate this blog from Rackspace to GCP — specifically I’ll use GCE for WordPress, and Cloud SQL for the persistent database storage.
Moving to CircleCI 2.0
CircleCI, which I used for much of my open-source integration testing, has released version 2.0. Support for 1.0 is finishing in August 2018, so it’s time to migrate my projects.
I’ve started with hraftd. It was pretty easy, but I find the documents for 2.0 are not great.
Monitoring: it’s not just for production
Monitoring — the measurement of your system, the gathering of telemetry, and alerting when it behaves anomalously — is key to running large-scale, modern computer systems. But what many developers today don’t realise is that monitoring can be a key part of your design cycle too.
rqlite and Hashicorp Raft 1.0
Hashicorp
recently released version 1.0 of their Raft consensus package. The Hashicorp implementation, along with SQLite, forms the core of rqlite. rqlite has now been ported to release 1.0 and will be a key change in the upcoming release of rqlite 5.0.
rqlite 4.3.0 released
Moving East
After almost 20 years in the San Francisco Bay Area, I am moving to Pittsburgh, PA, to accept a management role with Google. I am very much looking forward to working at a world-class software company.
It was a great two years at Percolate, and I wish all my old colleagues there the very best.
Happy New Year
2018 sees the ninth year of this blog. Happy New Year to one and all.
I am planning major work on rqlite, as well as more client libraries. I also hope to continue to write on software engineering leadership and management.
rqlite 4.2.2 released
One search to rule them all
This is the third in a series about core data structures and algorithms.
The outstanding characteristic of binary search is that it’s intuitive. Many algorithms are not, but binary search is what people — anyone, not just programmers — naturally execute when looking for an item in a sorted data set.
Ekanite 1.3.0 released
A new version of Ekanite, the syslog server with built-in search, has been released. v1.3.0 includes some bug fixes, including to shard management. It also moves Ekanite to Go 1.9.
You can download v1.3.0 from the GitHub releases page.
The power of sorting
This is the second in a series about core data structures and algorithms.
Considering how important sorting is to computer science and programming, it’s actually a mystery why more programmers don’t appreciate it.
rqlite 4.2.1 released
Hash tables distilled
This is the first in a series about core data structures and algorithms.
Many explanations of data structures focus on the implementation — and that is very important — but I’ve always found some context makes it so much easier to learn. And the trade-offs between various data structures is one of the most interesting contexts you can study.