THE VIDEO SHELF · zfs raid-z expansion
June 2021 FreeBSD Developer Summit: Raid-Z Expansion
Matt Ahrens presents the FreeBSD Foundation sponsored RAID-Z Expansion project for ZFS at the June 2021 FreeBSD Developer Summit. It explains how a RAID-Z vdev can be grown by adding disks on the fly.
Why HN readers recommended it
HN points to it as the video explanation of how RAID-Z expansion works without block pointer rewrite.
This is a summary from the source dataset, not an endorsement by Hacker News or the video creator.
Video & recommendation details
- Creator / channel
- FreeBSD
- Topic
- zfs raid-z expansion
- Format
- talk
- Level
- advanced
- HN recommenders in dataset
- 2
- HN mentions in dataset
- 3
- Recommendation years in dataset
- 2021–2023
These counts and years describe the included Hacker News records; they are not YouTube views or the video’s publication date.
From the original HN conversations
Excerpts from the recorded comments. Follow each source for the full comment and surrounding discussion.
For those that like videos more than text, there is a youtube video from last year [1] that explain the feature (unless it's changed since ,but it seems not to be the case). One downside that I see of this approach, if I understand it …
mrighele on Hacker News · 2022-02
In Raid-Z Expansion Feature for ZFS Goes LiveThat is not how this will work. The reason the parity ratio stays the same, is that all of the references to the data are by DVA (Data Virtual Address, effectively the LBA within the RAID-Z vdev). So the data will occupy the same amount …
allanjude on Hacker News · 2023-08
In OpenZFS – Incremental add of disks to existing RAIDZ
Summaries, classifications and recommendation records are from the HackerTube source dataset. Read about this library and its limitations.