Cluster membership management on AWS
2025-02-07
In continuation with my previous post, I have now finished porting hedge to AWS. It’s a trimmed-down version for now; only the features directly related to cluster membership are ported. I decided to make a separate repo, called hedge-cb (in keeping with the -cb theme), instead of updating hedge directly. And it’s mainly due to CGO. I didn’t really fancy the idea of introducing CGO to hedge as it could break a lot of the CI builds at work.
Aws · Cgo · Clockbound · Cluster · Distributed-Systems · Ffi · Go · Golang · Hedge · Leader-Election · Memberlist · Programming · Software · Systems · Tech · Timesync · True-Time
2 minutes
Distributed locking on AWS (ClockBound)
2025-02-02
After some testing time, I now have a working port of spindle in AWS. There were some slight changes from the original library to account for some of the differences between Cloud Spanner and PostgreSQL, but not really by much. It’s called spindle-cb, if you’re interested. It’s still half the battle though; I still have to port hedge as well before I could really use it for some of the planned projects in my pipeline.
Aws · Cgo · Clockbound · Distributed-Locking · Ffi · Go · Golang · Locking · Programming · Software · Spindle · Systems · Tech · Timesync · True-Time
2 minutes
AWS ClockBound client for Go (update)
2025-01-27
A week ago I published a short blog about clockbound-client-go. After some testing, turns out there’s an issue in reading the actual time from ClockBound’s shared memory segment; it seems to provide only the elapsed time since boot. However, using the Rust client and the FFI bindings produce the correct results. Either there is a problem in the code that reads the shared memory segment, or the SHM contents are wrong.
Aws · Cgo · Clockbound · Ffi · Go · Golang · Programming · Software · Systems · Tech · Timesync · True-Time
1 minute
2025-01-22
I’ve written a Go client for AWS ClockBound called clockbound-client-go. It uses the newer, shared memory segment protocol instead of the older, socket-based protocol. This is a prerequisite library needed to port spindle (and maybe even hedge) to AWS (for an upcoming project). As great a tech Google’s TrueTime is, there is no available API for it. It is only through Spanner that spindle achieves its locking mechanisms with TrueTime. Currently, it’s the cheapest way, surprisingly, to do distributed locking that I’ve tried so far, compared to the likes of Redis, Zookeeper, etcd, Consul, etc.
Aws · Clockbound · Go · Golang · Programming · Software · Systems · Tech · Timesync · True-Time
1 minute