BSDCan2018 - 1.54
BSDCan 2018
The Technical BSD Conference
| Speakers | |
|---|---|
|
Allan Jude |
| Schedule | |
|---|---|
| Day | Talks #2 - 9 June - 2018-06-09 |
| Room | DMS 1160 |
| Start time | 11:15 |
| Duration | 01:00 |
| Info | |
| ID | 947 |
| Event type | Lecture |
| Track | System Administration |
| Language used for presentation | English |
Implementing ZSTD in OpenZFS on FreeBSD
The story of my journey through time and code to implementing ZSTD compression in OpenZFS on FreeBSD. Follow a novice developer through the initial naive attempt to add support for a new compression algorithm to ZFS, then through successive improvements and new stumbling blocks to ultimately arrive at a finished product.
What is ZSTD, and why might I want to use it
First attempt
Allocating memory in the kernel is harder than it looks
Ohh, you have to free that memory when you are finished it it..., what a scam
The first prototype
Alignment is a thing
C is hard
First working prototype
Matt Ahrens pokes holes in your dreams
Don't steal from future generations of ZFS
You forgot about the L2ARC
Getting it committed
Conclusions