ZFS default compression algo for contemporary FreeBSD versions

[Volodymyr Kostyrko]

04.07.2013 19:05, Dmitry Morozovsky wrote:
> On Thu, 4 Jul 2013, Volodymyr Kostyrko wrote:
>
>>>>> is it sane to just set 'zfs compression=on dataset' to achieve best algo
>>>>> on
>>>>> fresh FreeBSD systems (-current and/or stable/9)?
>>>>
>>>> No and this is not safe AFAIK. Default compression is still lzjb and
>>>> bootloader can't boot oof datasets compressed with lzjb. However on
>>>> stable/9
>>>> you can simply set zfs compression=lz4 pool and everything would work fine
>>>> if
>>>> you updated the boot loader.
>>>
>>> I did not intend to compress root/boot datasets (and there is no much sense
>>> in
>>> this AFAICS);
>>>
>>> the second (and actually more important) my question is -- is lz4 in general
>>> better than lzjb?
>>
>> Yes. Much better in terms of speed.
>
> Then, next logical step semms to me is to make lz4 the default ;-P

As far as the code is too young and most other distribution are behind 
in terms of compatibility this is a no go.

My naive dream is to see lz4hc in ZFS too. This way I can just give up 
at compressing logs.

-- 
Sphinx of black quartz judge my vow.