Blog
Tuning the OpenZFS write throttle
In previous posts I discussed the problems with the legacy ZFS write throttle that cause degraded performance and wildly variable latencies. I then presented the new OpenZFS write throttle and I/O scheduler that Matt Ahrens and I designed. In addition to solving several problems in ZFS, the new approach was designed to be easy to reason about, measure, and adjust. In this post I'll cover performance analysis and tuning -- using DTrace of course. <br />