Click here to monitor SSC
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


Data Extraction Methods Part 1


Data Extraction Methods Part 1

Author
Message
VincentRainardi
VincentRainardi
SSC-Enthusiastic
SSC-Enthusiastic (141 reputation)SSC-Enthusiastic (141 reputation)SSC-Enthusiastic (141 reputation)SSC-Enthusiastic (141 reputation)SSC-Enthusiastic (141 reputation)SSC-Enthusiastic (141 reputation)SSC-Enthusiastic (141 reputation)SSC-Enthusiastic (141 reputation)

Group: General Forum Members
Points: 141 Visits: 191
Comments posted to this topic are about the content posted at http://www.sqlservercentral.com/columnists/vRainardi/dataextractionmethodspart1.asp
Greg Bogard-206345
Greg Bogard-206345
SSC Rookie
SSC Rookie (32 reputation)SSC Rookie (32 reputation)SSC Rookie (32 reputation)SSC Rookie (32 reputation)SSC Rookie (32 reputation)SSC Rookie (32 reputation)SSC Rookie (32 reputation)SSC Rookie (32 reputation)

Group: General Forum Members
Points: 32 Visits: 29

I appreciate the content of this well written article. I have been doing some of this myself, but have never had it described and documented. I look forward to Part 2.

Greg Bogard

Omaha NE




Regards,

Greg Bogard
shree
shree
Valued Member
Valued Member (50 reputation)Valued Member (50 reputation)Valued Member (50 reputation)Valued Member (50 reputation)Valued Member (50 reputation)Valued Member (50 reputation)Valued Member (50 reputation)Valued Member (50 reputation)

Group: General Forum Members
Points: 50 Visits: 622

It is very useful article to everyone, I got lot of answers from this article, thanks in advance for next article.

thanking you

sreeni


Richard Varno
Richard Varno
Forum Newbie
Forum Newbie (3 reputation)Forum Newbie (3 reputation)Forum Newbie (3 reputation)Forum Newbie (3 reputation)Forum Newbie (3 reputation)Forum Newbie (3 reputation)Forum Newbie (3 reputation)Forum Newbie (3 reputation)

Group: General Forum Members
Points: 3 Visits: 13

Excellent article. I appreciate the testing you have done to verify your theories and also the explanation behind each approcach.

Keep up the good work.


Sassan Karai
Sassan Karai
SSC-Enthusiastic
SSC-Enthusiastic (157 reputation)SSC-Enthusiastic (157 reputation)SSC-Enthusiastic (157 reputation)SSC-Enthusiastic (157 reputation)SSC-Enthusiastic (157 reputation)SSC-Enthusiastic (157 reputation)SSC-Enthusiastic (157 reputation)SSC-Enthusiastic (157 reputation)

Group: General Forum Members
Points: 157 Visits: 59
Could somebody explain the math for 58 records should take less than a second at 100 Mbps - Thanks already



VincentRainardi
VincentRainardi
SSC-Enthusiastic
SSC-Enthusiastic (141 reputation)SSC-Enthusiastic (141 reputation)SSC-Enthusiastic (141 reputation)SSC-Enthusiastic (141 reputation)SSC-Enthusiastic (141 reputation)SSC-Enthusiastic (141 reputation)SSC-Enthusiastic (141 reputation)SSC-Enthusiastic (141 reputation)

Group: General Forum Members
Points: 141 Visits: 191

Hi Skarai, it's just based on my experience, not based on math. A table which contains 1000 to 5000 records (say 10 to 100 columns) on 100M LAN normally takes 1 to 5 seconds to download from DB2 on AS/400 using iSeries OLE DB driver or from Informix on Unix using Informix native OLE DB driver into a staging table with no index in SQL Server on Windows 2000 or 2003 server, configured with RAID 5 for MDF and RAID 1 for LDF using 15k RPM disks, running on DELL 2850 with 8 MB memory, performed using DTS or SSIS with no transformation or scripting (just plain direct column to column mapping).

Kind regards,
Vincent Rainardi


Sassan Karai
Sassan Karai
SSC-Enthusiastic
SSC-Enthusiastic (157 reputation)SSC-Enthusiastic (157 reputation)SSC-Enthusiastic (157 reputation)SSC-Enthusiastic (157 reputation)SSC-Enthusiastic (157 reputation)SSC-Enthusiastic (157 reputation)SSC-Enthusiastic (157 reputation)SSC-Enthusiastic (157 reputation)

Group: General Forum Members
Points: 157 Visits: 59

Thanks for the follow up Vincent. I understand your earlier statemet now given the added explanation/observation. - Sassan





RonKyle
RonKyle
SSCommitted
SSCommitted (1.5K reputation)SSCommitted (1.5K reputation)SSCommitted (1.5K reputation)SSCommitted (1.5K reputation)SSCommitted (1.5K reputation)SSCommitted (1.5K reputation)SSCommitted (1.5K reputation)SSCommitted (1.5K reputation)

Group: General Forum Members
Points: 1509 Visits: 3395

I don't recommend that you get in the habit of downloading entire tables. It may only have 10,000 records today, but a year from now, how many will it have. We had a consultant use that method on our database, and at first the download took hours (lots of tables). After a couple of months, it was taking longer. I then had to rework it to only take the records modified or added that day. The download not only took less time, but the incremental increase was no longer there.

My recommendation: avoid the need to rewrite in the future and go with an incremental strategy.





Ramesh pathuru
Ramesh pathuru
Forum Newbie
Forum Newbie (1 reputation)Forum Newbie (1 reputation)Forum Newbie (1 reputation)Forum Newbie (1 reputation)Forum Newbie (1 reputation)Forum Newbie (1 reputation)Forum Newbie (1 reputation)Forum Newbie (1 reputation)

Group: General Forum Members
Points: 1 Visits: 3
Very good explanation. Waiting for the part2
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search