Re: Which data warehouse use?

I am currently running them from a Windows system. ODBC access to an i
from Ubuntu is just way too complex. I know I can do it, but it is
drop-dead simple under Windows so why bother. I see an opportunity for
someone...

-Jim

Jim Steil
VP of Information Technology
Quality Liquid Feeds, Inc.
608.935.2345 office
608.341.9896 cell


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:
midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Jack Kingsley
Sent: Tuesday, October 05, 2010 12:30 PM
To: Midrange Systems Technical Discussion
Subject: Re: Which data warehouse use?

How are you running the scripts on the ubuntu/python side or on the I side.

2010/10/5 jim@xxxxxxx <jim@xxxxxxx>

Can't say I've tried it with a db of that size, but would be curious to

see

how it performed. Are you talking about just adding 30-40k per day or

are

you also potentially updating the other 20-30 million? 30-40k of inserts
wouldn't be an issue.

I just ran a little test where I'm inserting about 400,000 records. It
took about 15 minutes to transfer the data.

Here are the some other things that I'm doing that would slow the process
down.
- I'm running this on my development workstation, with about a dozen

other

apps running
- I'm connected to the AS/400 and MySQL db over 100meg Ethernet, our
servers are all 1G connections
- I'm dropping all indices before and recreating after the transfer
- At the time of the transfer I'm also flattening out the database,

pulling

in data from a lot of lookup tables

But, that should give you a general idea of the performance. Not great,
but acceptable in my environment.

-Jim

Jim Steil
VP of Information Technology
Quality Liquid Feeds, Inc.
608.935.2345 office
608.341.9896 cell


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:
midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Dan Kimmel
Sent: Tuesday, October 05, 2010 10:44 AM
To: Midrange Systems Technical Discussion
Subject: RE: Which data warehouse use?

Can this setup handle a largish database? Say, 20 to 30 million records
with 30K to 40K new records a day?

I'd surmise ODBC would be inadequate to handle it.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:
midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Jim Steil
Sent: Tuesday, October 05, 2010 10:09 AM
To: Midrange Systems Technical Discussion
Subject: Re: Which data warehouse use?

I write Python scripts to handle it all. Python has a great database

API

that is really easy to implement. I connect to the AS/400 database using
ODBC and to the MySQL db with the Python MySQL driver. The programs are
quite simple. If you haven't used Python before, don't be intimidated by
it. It is really easy to get started with. And, if you are already
familiar with SQL then writing these scripts would be really easy.

I'm happy to help as much as possible to get you going if you're
interested. I really like using Python and enjoy getting others

hooked...

-Jim

On 10/5/2010 9:32 AM, Jack Kingsley wrote:

Jim, what are you using to move the data between the I and your MYSQL
Server.

On Fri, Oct 1, 2010 at 4:17 PM, Jim Steil<jim@xxxxxxx> wrote:

I take the opposite approach. In my mind the data warehousing data
is all reproducible from my production data. Therefore, I don't need
the robustness (and extra cost) the i offers. I take all of my data
to MySQL running on commodity hardware with Ubuntu. Low cost and
really very fast. Users can hit this database with their reporting
tool of choice all they want with no ill effects on the production

systems.

As for data warehousing software, we don't do anything fancy. We
write programs to generate all necessary standard reports to excel or
pdf. Ad hoc is done using MS Access (yuck) by our end users or using
SQL and programming as necessary when it gets too complicated for the

end users.

Just my $.02

-Jim

On 10/1/2010 2:27 PM, Nathan Andelin wrote:

I think that managing disparate systems is the biggest challenge in
IT,

and the

biggest waste of time. If it were up to me, I'd migrate MS SQL
Server

and

PostgreSQL server data and applications to IBM i. And not
surprisingly,

I'd do

data warehousing under IBM i, too. I can't recommend any separate
data warehouse system. Just create SQL views of IBM i tables, and
run queries against them.

-Nathan



----- Original Message ----
From: Tomasz Skorża<t.skorza@xxxxxxxxxxx>
To: midrange-l@xxxxxxxxxxxx
Sent: Fri, October 1, 2010 11:53:49 AM
Subject: Which data warehouse use?

Hi guys

I have one database on DB2-400, one on MS SQL Server and one on

PostrgreSQL.

Which dedicated software for data warehouse you propose to use -
best if

open

source - and which

database use for warehouse?
Other DB2, MS SQL, Postgre or maybe mySQL?

I will be gracefull for any ideas and prompting

Regards

Tomek

--
Jim Steil
VP of Information Technology
Quality Liquid Feeds, Inc.
608.935.2345 office
608.341.9896 cell
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