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Peoplesoft on Federated UDB?

Anyone using Peoplesoft on a Federated UDB
(shared nothing)Environ ment on Open System Platforms?
Preferably AIX, but any war stories would be good.

TEA
EB-C
Nov 12 '05
96 6280
Daniel,

Let's be careful not to confuse architectures with single vendors
marketing. (I know you top the statistics in the Oracle group. Try to
separate that for a moment...).
If you loose disks attached to node 6-10 and there are no other disks
catching the ball the same thing happens for both architectures. Data
gone. The data ownershp for nodes is logical.
Any node can get to any data physically. See Mark A's earlier
discussions on advances in disk subsystems.
Just for real life experience: I am currently working on an competitive
migration.
Customer goes from non DB2 on SMP to DB2 + DPF. We achieve 90% near
linear scalability. Did the logic have to be rewritten? Yes to a small
extend. But you don't get better than 90% and if you look at other
vendor's benchmarks you will find app-changes + only <60% scale.

I grant other vendors that they may be able to add a second or third
node with positive (whatever that means) scalability and no app changes.
I have yet to see proof that this approach scales beyond a small
sweetspot. In the benchmarks I see said vendor uses datapartitionin g
just the same which brings us back to the blurring of shared disk and
shared nothing we see in the industry today.

Cheers
Serge
Nov 12 '05 #51
Daniel,

Maybe the poster had what you had earlier....
Nov 12 '05 #52
Not sure the TPC comittee got that iodea when Oracle redefined January 30th.
http://www.tpc.org/tpcc/results/tpcc...p?id=103073004

Cheers
Serge

PS: I can't help it with the fucntion. Oracle customers just can't wait
to jump ship. It's empathy you know.
Nov 12 '05 #53
Mark A wrote, liberally but not maliciously edited by Blair:
...

Share nothing usually does not yield the best price/performance


Except here, where shared nothing databases seem to do okay in
price/performance:

http://www.tpc.org/tpch/results/tpch...ype=&version=2

Nov 12 '05 #54
With User-Defined Functions, all sorts of things are possible - one
could move the leap day from February to January so we'd have a January
32. If necessary, truncate all other months to 28 days, lengthen January
to 58 days, and will ship in January, meeting the TPC 6 month requirement.

Serge Rielau wrote:
Not sure the TPC comittee got that iodea when Oracle redefined January
30th.
http://www.tpc.org/tpcc/results/tpcc...p?id=103073004

Cheers
Serge

PS: I can't help it with the fucntion. Oracle customers just can't wait
to jump ship. It's empathy you know.


Nov 12 '05 #55
hrishy wrote:
Hi Daniel

I think i was misread..what you are referring to is shared
nothing...the RAC server which you setup is shared nothing
architecture..


Not the case. RAC has never been shared nothing. OPS was but not RAC.
RAC is a shared everything architecture just like mainframe DB2.

--
Daniel Morgan
http://www.outreach.washington.edu/e...ad/oad_crs.asp
http://www.outreach.washington.edu/e...oa/aoa_crs.asp
da******@x.wash ington.edu
(replace 'x' with a 'u' to reply)

Nov 12 '05 #56
hrishy wrote:
Hi daniel
Oops sorry..i made a blunder while posting...:-)

My line shared everything should hhave read as shared nothing and
shared nothing should have read as sahred everything.. :-)

Thanks for correcting me.

so my lines should read

select * from dept where deptno=10 it wil go to node 1

with shared nothing
select * from dept where deptno=10 it wil go to any of the nodes

with shared everything..

so application partitioning becomes vital in shared nothing
architecture.

once again thanks for correcting me.

regards
Hrishy


Oops on my part too. I responded to your first post before seeing this
one. Your correction ... is correct.

--
Daniel Morgan
http://www.outreach.washington.edu/e...ad/oad_crs.asp
http://www.outreach.washington.edu/e...oa/aoa_crs.asp
da******@x.wash ington.edu
(replace 'x' with a 'u' to reply)

Nov 12 '05 #57
Serge Rielau wrote:
Daniel,

Maybe the poster had what you had earlier....


Most likely. Great latitude should always be given early in the morning
late at night, and on days whose name ends with the letter 'Y'.

--
Daniel Morgan
http://www.outreach.washington.edu/e...ad/oad_crs.asp
http://www.outreach.washington.edu/e...oa/aoa_crs.asp
da******@x.wash ington.edu
(replace 'x' with a 'u' to reply)

Nov 12 '05 #58
Serge Rielau wrote:
Daniel,

Let's be careful not to confuse architectures with single vendors
marketing. (I know you top the statistics in the Oracle group. Try to
separate that for a moment...).
If you loose disks attached to node 6-10 and there are no other disks
catching the ball the same thing happens for both architectures.
Not the case with shared anything which is not single vendor. It is both
Oracle and mainframe DB2. If node 6 dies the load is redistributed.
There are no 'attached disks' and no data can possibly be lost.
gone. The data ownershp for nodes is logical.
Not with shared everything that is the point of the architecture and
exactly why it is used with DB2 on mainframes.
Any node can get to any data physically. See Mark A's earlier
discussions on advances in disk subsystems.
Even with Microsoft's Federated though Federated is far more of an issue
than is shared nothing. But still the data and the node are inseparable.
Node dies ... data is gone because the node owns the data and is not
longer in a position to share it with the other nodes.
Just for real life experience: I am currently working on an competitive
migration.
Customer goes from non DB2 on SMP to DB2 + DPF. We achieve 90% near
linear scalability. Did the logic have to be rewritten? Yes to a small
extend. But you don't get better than 90% and if you look at other
vendor's benchmarks you will find app-changes + only <60% scale.
That is not the case. First because the shared everything for both
vendors using it routinely runs in the 88-90% and both vendors claim so
but more importantly because no code has to be rewritten when nodes are
added or lost. The number you are quoting, < 60%, is either very old
Oracle (pre-RAC) or Microsoft's.
I grant other vendors that they may be able to add a second or third
node with positive (whatever that means) scalability and no app changes.
I have yet to see proof that this approach scales beyond a small
sweetspot.
I've seen the numbers from a test done that began with 1 node that was
scaled up to 128: Each time adding an identical 2x4 Linux box. Graphic
performance gave a linear 88-89% relationship. We didn't do it this
weekend but we routinely take our six RAC lab machines, configure them
as three two node clusters, test fail-over, and then reconfigure in just
a few minutes to a single six-node cluster changing nothing except a few
parameter files.
Cheers
Serge


--
Daniel Morgan
http://www.outreach.washington.edu/e...ad/oad_crs.asp
http://www.outreach.washington.edu/e...oa/aoa_crs.asp
da******@x.wash ington.edu
(replace 'x' with a 'u' to reply)

Nov 12 '05 #59
Serge Rielau wrote:
Not sure the TPC comittee got that iodea when Oracle redefined January
30th.
http://www.tpc.org/tpcc/results/tpcc...p?id=103073004

Cheers
Serge

PS: I can't help it with the fucntion. Oracle customers just can't wait
to jump ship. It's empathy you know.


This ship? http://www.psoug.org/cruise2004.html

--
Daniel Morgan
http://www.outreach.washington.edu/e...ad/oad_crs.asp
http://www.outreach.washington.edu/e...oa/aoa_crs.asp
da******@x.wash ington.edu
(replace 'x' with a 'u' to reply)

Nov 12 '05 #60

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