Peter Schuller wrote:
Is this expected behavior? Assuming concurrent reads (not synchronous and
sequential) I would naively expect an ndisk raidz2 pool to have a
normalized performance of n for small reads.
q.v. http://www.opensolaris.org/jive/thread.jspa?threadID=20942&tstart=0
where suc
> > Is this expected behavior? Assuming concurrent reads (not synchronous and
> > sequential) I would naively expect an ndisk raidz2 pool to have a
> > normalized performance of n for small reads.
>
> q.v. http://www.opensolaris.org/jive/thread.jspa?threadID=20942&tstart=0
> where such behavior in
Peter Schuller wrote:
I've been using a simple model for small, random reads. In that model,
the performance of a raidz[12] set will be approximately equal to a single
disk. For example, if you have 6 disks, then the performance for the
6-disk raidz2 set will be normalized to 1, and the perform
On Jan 3, 2007, at 19:55, Jason J. W. Williams wrote:
performance should be good? I assumed it was an analog to RAID-6. In
our recent experience RAID-5 due to the 2 reads, a XOR calc and a
write op per write instruction is usually much slower than RAID-10
(two write ops). Any advice is greatly
Hi Robert,
I've read that paper. Thank you for the condescension.
-J
On 1/3/07, Robert Milkowski <[EMAIL PROTECTED]> wrote:
Hello Jason,
Thursday, January 4, 2007, 1:55:02 AM, you wrote:
JJWW> Hi Robert,
JJWW> Our X4500 configuration is multiple 6-way (across controllers) RAID-Z2
JJWW> grou
Hello Jason,
Thursday, January 4, 2007, 1:55:02 AM, you wrote:
JJWW> Hi Robert,
JJWW> Our X4500 configuration is multiple 6-way (across controllers) RAID-Z2
JJWW> groups striped together. Currently, 3 RZ2 groups. I'm about to test
JJWW> write performance against ZFS RAID-10. I'm curious why RAID
Hello Peter,
Thursday, January 4, 2007, 1:12:47 AM, you wrote:
>> I've been using a simple model for small, random reads. In that model,
>> the performance of a raidz[12] set will be approximately equal to a single
>> disk. For example, if you have 6 disks, then the performance for the
>> 6-dis
Hi Robert,
That makes sense. Thank you. :-) Also, it was zpool I was looking at.
zfs always showed the correct size.
-J
On 1/3/07, Robert Milkowski <[EMAIL PROTECTED]> wrote:
Hello Jason,
Wednesday, January 3, 2007, 11:40:38 PM, you wrote:
JJWW> Just got an interesting benchmark. I made two
Hello Jason,
Wednesday, January 3, 2007, 11:40:38 PM, you wrote:
JJWW> Just got an interesting benchmark. I made two zpools:
JJWW> RAID-10 (9x 2-way RAID-1 mirrors: 18 disks total)
JJWW> RAID-Z2 (3x 6-way RAIDZ2 group: 18 disks total)
JJWW> Copying 38.4GB of data from the RAID-Z2 to the RAID-10
Hi Robert,
Our X4500 configuration is multiple 6-way (across controllers) RAID-Z2
groups striped together. Currently, 3 RZ2 groups. I'm about to test
write performance against ZFS RAID-10. I'm curious why RAID-Z2
performance should be good? I assumed it was an analog to RAID-6. In
our recent expe
Hello Jason,
Wednesday, January 3, 2007, 11:11:31 PM, you wrote:
JJWW> Hi Richard,
JJWW> Hmmthat's interesting. I wonder if its worth benchmarking RAIDZ2
JJWW> if those are the results you're getting. The testing is to see the
JJWW> performance gain we might get for MySQL moving off the FLX2
> I've been using a simple model for small, random reads. In that model,
> the performance of a raidz[12] set will be approximately equal to a single
> disk. For example, if you have 6 disks, then the performance for the
> 6-disk raidz2 set will be normalized to 1, and the performance of a 3-way
Just got an interesting benchmark. I made two zpools:
RAID-10 (9x 2-way RAID-1 mirrors: 18 disks total)
RAID-Z2 (3x 6-way RAIDZ2 group: 18 disks total)
Copying 38.4GB of data from the RAID-Z2 to the RAID-10 took 307
seconds. Deleted the data from the RAID-Z2. Then copying the 38.4GB of
data from
Hi Richard,
Hmmthat's interesting. I wonder if its worth benchmarking RAIDZ2
if those are the results you're getting. The testing is to see the
performance gain we might get for MySQL moving off the FLX210 to an
active/passive pair of X4500s. Was hoping with that many SATA disks
RAIDZ2 would
Jason J. W. Williams wrote:
Hello All,
I was curious if anyone had run a benchmark on the IOPS performance of
RAIDZ2 vs RAID-10? I'm getting ready to run one on a Thumper and was
curious what others had seen. Thank you in advance.
I've been using a simple model for small, random reads. In tha
On 03 January, 2007 - Jason J. W. Williams sent me these 0,4K bytes:
> Hello All,
>
> I was curious if anyone had run a benchmark on the IOPS performance of
> RAIDZ2 vs RAID-10? I'm getting ready to run one on a Thumper and was
> curious what others had seen. Thank you in advance.
http://blogs.s
Hello All,
I was curious if anyone had run a benchmark on the IOPS performance of
RAIDZ2 vs RAID-10? I'm getting ready to run one on a Thumper and was
curious what others had seen. Thank you in advance.
Best Regards,
Jason
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