Can FreeBSD benefit from MacOS X ZFS?

As the subject says... Can FreeBSD benefit from the macos
port of zfs? I 
know this is a VERY new announcement, but not knowing much
about macos x 
in general I'm wondering how much it might help our tree,
with respect to 
both the memory and 32-bit issues. Just throwing it out
there for 
discussion, if anyone has any knowledge of both.


Regards,

Wes

_______________________________________________
freebsd-fsfreebsd.org mailing list

http://lists.freebsd.org/mailman/listinfo/freebsd-fs
To unsubscribe, send any mail to
"freebsd-fs-unsubscribefreebsd.org"

WES MORGAN <MORGANWCHEMIKALS.ORG> WRITES:
> AS THE SUBJECT SAYS... CAN FREEBSD BENEFIT FROM THE
MACOS PORT OF ZFS?
> I KNOW THIS IS A VERY NEW ANNOUNCEMENT, BUT NOT KNOWING
MUCH ABOUT
> MACOS X IN GENERAL I'M WONDERING HOW MUCH IT MIGHT HELP
OUR TREE, WITH
> RESPECT TO BOTH THE MEMORY AND 32-BIT ISSUES. JUST
THROWING IT OUT
> THERE FOR DISCUSSION, IF ANYONE HAS ANY KNOWLEDGE OF
BOTH.

DID YOU MISS THE PART WHERE APPLE NO LONGER SELL 32-BIT
COMPUTERS?

DES
-- 
DAG-ERLING SMøRGRAV - DESDES.NO
_______________________________________________
FREEBSD-FSFREEBSD.ORG MAILING LIST
HTTP://LISTS.FREEBSD.ORG/MAILMAN/LISTINFO/FREEBSD-FS
TO UNSUBSCRIBE, SEND ANY MAIL TO
"FREEBSD-FS-UNSUBSCRIBEFREEBSD.ORG"

On Thu, 17 Jan 2008, Dag-Erling Smørgrav wrote:

> Wes Morgan <morganwchemikals.org> writes:
>> As the subject says... Can FreeBSD benefit from the
macos port of zfs?
>> I know this is a VERY new announcement, but not
knowing much about
>> macos x in general I'm wondering how much it might
help our tree, with
>> respect to both the memory and 32-bit issues. Just
throwing it out
>> there for discussion, if anyone has any knowledge
of both.
>
> Did you miss the part where Apple no longer sell 32-bit
computers?

Possibly! I looked briefly but didn't see anything
explicitly saying that 
later versions of OS X were 64-bit only. But, that's only
half of the 
question. There are still memory issues on amd64.

_______________________________________________
freebsd-fsfreebsd.org mailing list

http://lists.freebsd.org/mailman/listinfo/freebsd-fs
To unsubscribe, send any mail to
"freebsd-fs-unsubscribefreebsd.org"

On Thu, Jan 17, 2008 at 12:37:12AM +0100, Dag-Erling
Smørgrav wrote:
> Did you miss the part where Apple no longer sell 32-bit
computers?

Well, there's the iPod-Touch and iPhone, which is an ARM
running
OS-X (supposedly).  Of course, ZFS isn't an issue there...

I think that one can still buy OS upgrades for 32-bit
PowerPC
Macs, too, but perhaps they don't have working ZFS either.

Cheeers,

-- 
Andrew
_______________________________________________
freebsd-fsfreebsd.org mailing list

http://lists.freebsd.org/mailman/listinfo/freebsd-fs
To unsubscribe, send any mail to
"freebsd-fs-unsubscribefreebsd.org"

On Thu, 17 Jan 2008, Dag-Erling Smørgrav wrote:

> Wes Morgan <morganwchemikals.org> writes:
>
>> As the subject says... Can FreeBSD benefit from the
macos port of zfs? I 
>> know this is a VERY new announcement, but not
knowing much about macos x in 
>> general I'm wondering how much it might help our
tree, with respect to both 
>> the memory and 32-bit issues. Just throwing it out
there for discussion, if 
>> anyone has any knowledge of both.
>
> Did you miss the part where Apple no longer sell 32-bit
computers?

Actually, the first generation MacBook/MacBook Pro's donly
have 64-bit 
support, and both the kernel and user address spaces are
32-bit on those 
systems.  They did, however, have PAE to support larger
physical memories. 
More recent Intel Macs have 64-bit address support for
userspace but 32-bit 
kernels.  Unlike with FreeBSD, the Mac OS X kernel runs in
its own dedicated 
32-bit address space rather than splitting a single 32-bit
address space with 
userspace.  This leads to greater system call overhead
(system calls require a 
full context switch) but much more kernel address space.  My
impression has 
been that Apple has also had challenges dealing with ZFS's
run-away resource 
use, however...

Robert N M Watson
Computer Laboratory
University of Cambridge
_______________________________________________
freebsd-fsfreebsd.org mailing list

http://lists.freebsd.org/mailman/listinfo/freebsd-fs
To unsubscribe, send any mail to
"freebsd-fs-unsubscribefreebsd.org"

WES MORGAN <MORGANWCHEMIKALS.ORG> WRITES:
> DAG-ERLING SMøRGRAV <DESDES.NO> WRITES:
> > DID YOU MISS THE PART WHERE APPLE NO LONGER SELL
32-BIT COMPUTERS?
> POSSIBLY! I LOOKED BRIEFLY BUT DIDN'T SEE ANYTHING
EXPLICITLY SAYING
> THAT LATER VERSIONS OF OS X WERE 64-BIT ONLY. BUT,
THAT'S ONLY HALF OF
> THE QUESTION. THERE ARE STILL MEMORY ISSUES ON AMD64.

LATER VERSIONS OF OS X SUPPORT BOTH 32-BIT AND 64-BIT INTEL
AND POWERPC
MACHINES, BUT THEY'RE STARTING TO SET LOWER BOUNDS ON WHAT
IT WILL RUN
ON - IT WON'T INSTALL ON MY 2003 MODEL G4 EMAC, FOR
INSTANCE.  I EXPECT
THAT BY THE TIME OS X GETS WRITE SUPPORT FOR ZFS, POWERPC
WILL BE
HISTORY.  I ALSO SUSPECT THAT APPLE SEE ZFS AS A MOSTLY
SERVER-SIDE
FEATURE, WHICH REDUCES THE IMPORTANCE OF 32-BIT MACHINES
EVEN FURTHER.

(GOING OFF ON A TANGENT, I WAS VERY AMUSED BY THE
SELF-STYLED PUNDITS'
AMAZEMENT AT THE INTEL MAC ANNOUNCEMENT.  "GEE, WE
NEVER SAW THAT ONE
COMING!"  I MEAN, DARWIN HAD ONLY HAD I386 AND
"FAT BINARY" SUPPORT FOR
FIVE YEARS AT THAT POINT.)

DES
-- 
DAG-ERLING SMøRGRAV - DESDES.NO
_______________________________________________
FREEBSD-FSFREEBSD.ORG MAILING LIST
HTTP://LISTS.FREEBSD.ORG/MAILMAN/LISTINFO/FREEBSD-FS
TO UNSUBSCRIBE, SEND ANY MAIL TO
"FREEBSD-FS-UNSUBSCRIBEFREEBSD.ORG"