Kyle Downey


Low-latency messaging library

Martin Thompson's Strangeloop talk is worth watching for anyone interested in high-performance Java. Like Peter Lawrey's Chronicle Queue, Aeron's foundation is a low-latency append-only log, but even more ambitious. It is media-agnostic and --like ZeroMQ -- meant to be portable across languages, and he envisions supporting . . .

Read More

February 28, 2015

SATA cable headaches

HP really doesn't want you to use a RAID card

The HP Z800 has four drive sleds accessible through the side panel. You can drop in a 3.5" drive and slide it in and it plugs into a SATA port at the back. These ports in turn go to four cables that can plug into the SAS or SATA ports on the bottom of the motherboard. Unfortunately the LSI controller in the Z800 is old and does not . . .

Read More

February 21, 2015

Drone CI

(Not really) securing a local server with Nginx

Being able to build and test software with every change is very important, especially if the goal is to iterate and deliver into production constantly. As projects get bigger the chance that you will have an unnoticed regression gets higher, and so it's important to catch them while you still have fresh in your mind what changed recently. . . .

Read More

February 16, 2015

Building Bitcoin Core

Beware of crypto bearing software patents

One of the things I want to do with the new server is run a Bitcoin full node. It doesn't compile on Solaris, so that meant setting up a Linux virtual machine first.

Since, sadly, the painfully hip Crunchbang Linux distribution is now no longer being maintained, I started by setting up Fedora Workstation 21 under VirtualBox. I . . .

Read More

February 14, 2015

Solaris ZFS and the 2 TB Limit

Starting over with the new server

The two hard drive caddies arrived, and I installed the dual Seagate Barracuda 3 TB drives. Unfortunately the system BIOS did not recognize more than 2 TB, nor did Solaris or Fedora 21 Server.

Silvrback blog image

From Seagate Beyond 2TB site my understanding is on older BIOS the only way to make this work is with a special driver available . . .

Read More

February 11, 2015

Lies, damn lies and benchmarks

Solaris workstation vs. MacOS laptop speed test

This makes no sense.

On most single-threaded benchmarks the workstation outperforms the Core i7 in the MacBook Air; this is not surprising given the Xeons are at 2.7 GHz and the i7 at 2 GHz. But on multi-threaded code and NIO, the little laptop whups the 12-core workstation.

The multithreading I think I understand. The . . .

Read More

February 07, 2015


Up and running with Solaris x86

With the Live CD issues sorted out, the installation was quite painless: double-click the installer on the desktop, indicate it could reformat the whole SSD disk, and away we go. The Package Manager made it easy to bolt on Java 8 and git, and tomorrow will download code and try a compile and run some of the benchmarks developed originally on . . .

Read More

February 07, 2015