On 2021-03-02 18:54, cretin1997 wrote:
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Tuesday, March 2, 2021 11:15 PM, Chris <[email protected]> wrote:
On 2021-02-28 07:38, cretin1997 via openindiana-discuss wrote:
The reason is or should be, because of its potential cost. That is;
compression can consume a great deal more CPU cycles. So if the host has
limited resources, either outright or because of work load. Then
compression
will not be an advantage, and may swamp the system. Further, in several
implementations several of the settings are somewhat dynamic, and can be
"tuned".
Compression being one of them.
Apologies in advance if this question has already been answered. I'm in the
process of getting caught up on my mail. :-)
--Chris
>
--
~10yrs a FreeBSD maintainer of ~160 ports
~40yrs of UNIX
Except this easy to easy to change from not compressed to compressed.
Setting the
attribute alone not work. If you think have to do send/recv everything to
get it
compressed is a pleasure task, especially you have to do this every time
after you
installed a new system, I have nothing to say anymore. Why don't it just the
thing
already set to be compressed from the beginning? It will save much time and
space
for the user!
BTW, FreeBSD seemed to turn on lz4 compression by default. Nowadays with
modern
hardware, it's sane to turn it on by default. Your arguments about an old
system
should be dismissed completely. None of the Illumos is for old and weak
system.
Illumos is a resource hog.
From a "server" perspective, I *completely* agree. OTOH a "server" OS that
presents
itself as a live desktop with the option to install, attracts "desktop"
users. So...
Further; ZFS compression isn't as simple as "throwing a switch"; there's a
reasonable
amount of "tuning" that compression involved. On one hand, if you've not got
that much
in your pool(s). _immidiate_ compression if of little value. ZFS send/reveive
is
another matter, and so on...
Seems to me, the best solution might be setting a "default" level/algo, and
provide
an option in the installer to enable it.
That's _my_ take on it. :-)
--Chris
--
~10yrs a FreeBSD maintainer of ~160 ports
~40yrs of UNIX
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