fhg
Volume 8, Number 14 -- April 9, 2008

Performance Advice from a Mysterious Friend, Part 4

Published: April 9, 2008

by Ted Holt

I've already published three performance tips from one of your fellow subscribers, a consultant who has found these techniques to be helpful. Here's tip number 4.

Our friend's advice: "Use journal cache support."

Journal caching is similar to file buffering. Caching directs the system to cache journal entries in main storage before flushing them to disk. You do not get journal caching automatically. It is a separately chargeable feature of i5/OS.

The performance advantage is like that of buffering files. Normally the system writes a journal entry to the journal receiver before continuing with the next I/O operation. Caching allows the system to continue with the next I/O before the journal entry is written to disk.

The V5R3 Information Center lists several advantages of journal caching and gives recommendations for when journal caching should and should not be used.


RELATED STORIES

Performance Advice from a Mysterious Friend, Part 3

Performance Advice from a Mysterious Friend, Part 2

Performance Advice from a Mysterious Friend



                     Post this story to del.icio.us
               Post this story to Digg
    Post this story to Slashdot


Sponsored By
WORKSRIGHT SOFTWARE

Do you need area code information?
Do you need ZIP Code information?
Do you need ZIP+4 information?
Do you need city name information?
Do you need county information?
Do you need a nearest dealer locator system?

We can HELP! We have affordable AS/400 software and data to do all of the above. Whether you need a simple city name retrieval system or a sophisticated CASS postal coding system, we have it for you!

The ZIP/CITY system is based on 5-digit ZIP Codes. You can retrieve city names, state names, county names, area codes, time zones, latitude, longitude, and more just by knowing the ZIP Code. We supply information on all the latest area code changes. A nearest dealer locator function is also included. ZIP/CITY includes software, data, monthly updates, and unlimited support. The cost is $495 per year.

PER/ZIP4 is a sophisticated CASS certified postal coding system for assigning ZIP Codes, ZIP+4, carrier route, and delivery point codes. PER/ZIP4 also provides county names and FIPS codes. PER/ZIP4 can be used interactively, in batch, and with callable programs. PER/ZIP4 includes software, data, monthly updates, and unlimited support. The cost is $3,900 for the first year, and $1,950 for renewal.

Just call us and we'll arrange for 30 days FREE use of either
ZIP/CITY or PER/ZIP4.

WorksRight Software, Inc.
Phone: 601-856-8337
Fax: 601-856-9432
E-mail: software@worksright.com
Web site: www.worksright.com


Senior Technical Editor: Ted Holt
Technical Editors: Howard Arner, Joe Hertvik, Shannon O'Donnell, Kevin Vandever
Contributing Technical Editors: Joel Cochran, Wayne O. Evans, Raymond Everhart,
Bruce Guetzkow, Brian Kelly, Marc Logemann, David Morris
Publisher and Advertising Director: Jenny Thomas
Advertising Sales Representative: Kim Reed
Contact the Editors: To contact anyone on the IT Jungle Team
Go to our contacts page and send us a message.

Sponsored Links

MoshiMoshi:  An Interactive Experience for the System i Community. See Episode 1 now!
Northeast User Groups:  18th Annual Conference, April 14-16, 2008, Sheraton Hotel, Framingham, MA
LANSA:  It's Time for 4 days of education at the LANSA User Conference, May 4 – 7, in Orlando


 

IT Jungle Store Top Book Picks

Easy Steps to Internet Programming for AS/400, iSeries, and System i: List Price, $49.95
Getting Started with PHP for i5/OS: List Price, $59.95
The System i RPG & RPG IV Tutorial and Lab Exercises: List Price, $59.95
The System i Pocket RPG & RPG IV Guide: List Price, $69.95
The iSeries Pocket Database Guide: List Price, $59.00
The iSeries Pocket Developers' Guide: List Price, $59.00
The iSeries Pocket SQL Guide: List Price, $59.00
The iSeries Pocket Query Guide: List Price, $49.00
The iSeries Pocket WebFacing Primer: List Price, $39.00
Migrating to WebSphere Express for iSeries: List Price, $49.00
iSeries Express Web Implementer's Guide: List Price, $59.00
Getting Started with WebSphere Development Studio for iSeries: List Price, $79.95
Getting Started With WebSphere Development Studio Client for iSeries: List Price, $89.00
Getting Started with WebSphere Express for iSeries: List Price, $49.00
WebFacing Application Design and Development Guide: List Price, $55.00
Can the AS/400 Survive IBM?: List Price, $49.00
The All-Everything Machine: List Price, $29.95
Chip Wars: List Price, $29.95


 
The Four Hundred
It's Official: Now We're Power Systems and i for Business

Power6 Chips Get i Support in New Entry and Blade Machines

We're Listening About and Acting For the i Platform, Says IBM

Mad Dog 21/21: Bears' Turns

Goodbye, AS/400, Old Friend

The Linux Beacon
Oracle Touts Unbreakable Linux, Adds Clusterware Support

Ubuntu 6.10 Comes to the End of the Line

IBM Merges System p and System i Server Lines

IBM Launches Dual-Core Power6 JS12 Blade Server

Most CIOs Say 2008 IT Budgets Are Stable, So Far

Four Hundred Stuff
Coglin Mill Debuts Lower Cost Versions of ETL Tools

Profound Ships New Web-Based DB2/400 Editor

Linoma Unveils Browser-Based Data Transfer Tool

RJS Adds Document Capture, Packaging Offerings to WebDocs

Readers Respond to "IBM Changes Name Back to AS/400 . . ."

Big Iron
Bears' Turns

Top Mainframe Stories From Around the Web

Chats, Webinars, Seminars, Shows, and Other Happenings

System i PTF Guide
April 5, 2008: Volume 10, Number 14

March 29, 2008: Volume 10, Number 13

March 22, 2008: Volume 10, Number 12

March 15, 2008: Volume 10, Number 11

March 8, 2008: Volume 10, Number 10

March 1, 2008: Volume 10, Number 9

The Windows Observer
Open XML Gets ISO Approval to Become a Standard

HP Targets SMB Shops with New Entry Servers

Windows Mobile Learns from iPhone with Version 6.1

Microsoft Won't Raise Its Yahoo Offer

CMDB: A Journey, Not a Destination

The Unix Guardian
Yen Steps Down as Microelectronics Head, Exits Sun

Sun Bags $44.3 Million DARPA Contract for Funky Chip Interconnect

Disk Array Capacity and Sales Still Growing at Historical Rates

CMDB: A Journey, Not a Destination

Dell Inks OEM Deal with Egenera for Server Management Software

Four Hundred Monitor
Four Hundred Monitor's
Full iSeries Events Calendar

THIS ISSUE SPONSORED BY:

ProData Computer Services
WorksRight Software
Guild Companies


Printer Friendly Version


TABLE OF CONTENTS
SQL Doesn't Like Logical Files

Performance Advice from a Mysterious Friend, Part 4

Admin Alert: V6R1 Changes for the i5/OS Administrator, Part 1

Four Hundred Guru

BACK ISSUES

From the IT Jungle Forums
Al Barsa passed away

Copying recs from a subfile to a file and keeping highlights

Imbedded SQL

CPYFRMSTMF problem

CPYTOIMPF problem

Table Transferfrom OS400 to Windows





 
Subscription Information:
You can unsubscribe, change your email address, or sign up for any of IT Jungle's free e-newsletters through our Web site at http://www.itjungle.com/sub/subscribe.html.

Copyright © 1996-2008 Guild Companies, Inc. All Rights Reserved.
Guild Companies, Inc., 50 Park Terrace East, Suite 8F, New York, NY 10034

Privacy Statement