zfs discuss - Mar 2010 - compressed root pool at installation time with flash archive predeployment script

I was trying to think of a way to set compression=on at the beginning of a 
jumpstart.  The only idea I''ve come up with is to do so with a flash 
archive predeployment script.  Has anyone else tried this approach?

Thanks,

Chad
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On Mar 2, 2010, at 7:40 AM, chad.campbell at cummins.com
wrote:
> I was trying to think of a way to set compression=on at the beginning of a
jumpstart.  The only idea I''ve come up with is to do so with a flash
archive predeployment script.  Has anyone else tried this approach?
It depends on how you are installing. For JumpStart (with or without flars) you
can
use a preinstall script.  For AI, you can use a preinstall script (are they
still called
preinstall scripts?)  For GUI installers or text-based autoinstallers
(OpenSolaris
LiveCD or Nexenta) you can just set the parameter in a separate shell after the
rpool or syspool is created -- or -- you can use a clever script like Glenn
describes
here:
http://blogs.sun.com/glagasse/entry/howto_enable_zfs_compression_when
 -- richard

ZFS storage and performance consulting at http://www.RichardElling.com
ZFS training on deduplication, NexentaStor, and NAS performance
http://nexenta-atlanta.eventbrite.com (March 16-18, 2010)

>>>>> "cc" == chad campbell <chad.campbell at
cummins.com> writes:
    cc> I was trying to think of a way to set compression=on
    cc> at the beginning of a jumpstart.

are you sure grub/ofwboot/whatever can read compressed files?
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On 03/02/10 12:57, Miles Nordin wrote:
>>>>>> "cc" == chad campbell<chad.campbell at
cummins.com>  writes:
>
>      cc>  I was trying to think of a way to set compression=on
>      cc>  at the beginning of a jumpstart.
>
> are you sure grub/ofwboot/whatever can read compressed files?
Grub and the sparc zfs boot blocks can read lzjb-compressed blocks in zfs.

I have compression=on (and copies=2) for both sparc and x86 roots; I''m 
told that grub''s zfs support also knows how to fall back to ditto
blocks
if the first copy fails to be readable or has a bad checksum.

					- Bill