OpenZFS Will Soon Have Zstd Compression Support

[phoronix]

Phoronix: OpenZFS Will Soon Have Zstd Compression Support

Zstd compression continues becoming more widely adopted from Ubuntu looking at Zstd-compressed packages to compressing the Linux kernel image to now the OpenZFS file-system soon having support for Facebook's Zstandard compression algorithm...

http://www.phoronix.com/scan.php?page=news_item&px=OpenZFS-Zstd-Compression

[AndyChow]

As far as I know, grub still does not support Zstd compressed linux kernel images. Might be available soon, but right now it seems it's a no-go.

[Hi-Angel]

As far as I know, grub still does not support Zstd compressed linux kernel images. Might be available soon, but right now it seems it's a no-go.

Worse, it can't even boot from zstd-compressed BTRFS. Barely yesterday I migrated my personal laptop to BTRFS+zstd, and found it out, so I had to allocate a separate boot partition.

Otherwise though BTRFS+zstd is pretty likable — system boots faster, apps starting up quicker.

[nils_]

As far as I know, grub still does not support Zstd compressed linux kernel images. Might be available soon, but right now it seems it's a no-go.

The decompression actually happens inside the kernel. Grub just loads the kernel, jumps to a certain address (which then switches the CPU into protected mode, then into long mode), decompresses the kernel and then jumps to the kernel address in RAM.

[aht0]

As far as I know, grub still does not support Zstd compressed linux kernel images. Might be available soon, but right now it seems it's a no-go.

AFAIK it does not support even "plain" ZFS (booting from ZFS) in a reliable manner.

[ryao]

I boot using /boot on ZFS and GRUB2 all the time and it works for me.

[aht0]

I boot using /boot on ZFS and GRUB2 all the time and it works for me.

Yeah it's possible, but often enough it's utter pain it the rear end. TrueOS gave up on using GRUB for this very reason.