> I expect it will go SO SLOW, that some function somewhere is eventually
> going to fail/timeout. That system is barely usable WITHOUT
> compression. I hope at the very least you're disabling every single
> unnecessary service before doing any testing, especially the GUI.
> ZFS uses ram, and plenty of it. That's the nature of COW. Enabling
> realtime compression with an 800mhz p3? Kiss any performance, however
> poor it was, goodbye.
Regardless of that, gzip is still heavy on the system. Unbz2ing a 30MB
package (e.g. VirtualBox) in my packages ZFS filesystem with gzip
compression does affect interactivity quite a lot (i.e. 1 sec UI freezes
on transaction commit). This on an Intel Core2 Quad!
I do not notice these effects using lzjb.
People have been clamoring for lzo support more than a year ago. That
algorithm gets a decent compression rate not far from gzip and has a
very light footprint similar to lzjb. I think someone even wanted to
start a project for porting alternative compression methods to ZFS,
focusing on BWT tho, but nothing came from that (at least publicly).
zfs-discuss mailing list