Steven Stallion wrote:
[EMAIL PROTECTED] wrote:
...
>
Actually, no.
ZFS works best with 64bit CPUs (and I can testify to that with
issues I've had on i386 PCs), so getting it to run on SPARCv8
systems is goint to mean a compromise in performance for
ZFS vs what you'll see with UltraSPARC and amd64.
Darren
No disagreement here, however we work with what we have ;) How degraded
would the performance be using a framework friendly HBA? Essentially,
anything over 20M/s would be an improvement over the currently installed
OS.
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The big issue with sparcv8 chips and ZFS would be memory bandwidth.... I
don't remember the figures off the top of my head, but I do remember
UltraSPARC I to be a very significant jump in performance when it came
to moving large blocks of data from place to place. ZFS will touch
every byte in order to do checksums.
A quick dive into google indicates that SparcStation 10s did about
20MB/sec doing bcopy, and UltraSparc I about 170MB/sec.
Basically, you'll find an SS10 violates the assumptions upon which ZFS
was designed - fast cpus, lots of memory bandwidth. My guess is that
you would be quite lucky to get anywhere close to 20MB/sec...
When new CPUs with lower power consumption are 50x faster, it doesn't
make much sense to stick w/ the old. Keep in mind that the SS10 was
introduced in the middle of 1992 - it's 15 years old as of last month.
It was instantly obsolete in 1995, when Sun shipped the UltraSPARC 1.
- Bart
--
Bart Smaalders Solaris Kernel Performance
[EMAIL PROTECTED] http://blogs.sun.com/barts
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