13
Sat, Apr
5 New Articles

Competitive Alternatives to IBM's OLE DB Providers: Who Are These Guys?

APIs
Typography
  • Smaller Small Medium Big Bigger
  • Default Helvetica Segoe Georgia Times

If you want to use Microsoft ActiveX Data Objects (ADO) to access AS/400 information, the best way to do it is by using an OLE DB provider. IBM supplies its own IBM OLE DB provider for accessing AS/400 tables and data queues with Client Access for Windows 95/NT (the Windows 95/NT client) and AS/400 Client Access Express for Windows (the Express client). Given this, why would any other company create an OLE DB provider and attempt to compete with a free product, and why would you want to consider paying for this functionality?

In this article, I’m going to examine some of the common problems with IBM’s OLE DB provider and look at some competitive alternatives for providing OLE DB support within your PC applications. Even though the IBM OLE DB provider is free with the Windows 95/NT client and Express client, there are always certain situations in which you are going to need an alternative. I’ll examine your alternatives and explain why you may want to consider them for your shop.

 

What’s Wrong with IBM’s OLE DB Provider?

 

Most people want an OLE DB provider so they can use PC-based reporting tools, program in Visual Basic, or develop Active Server Page (ASP) applications that talk to the AS/400. It is in the last two applications where IBM’s OLE DB provider falls down.

If you have Client Access for Windows 95/NT, the first headache lies in obtaining support for the Microsoft OLE DB 2.0 specification. If you’re running Client Access for Windows 95/NT V3R1M3, IBM’s OLE DB provider supports ActiveX Data Objects (ADO) versions 1.0 in the base version. ADO version 1.5 and 2.0 can also be supported by the V3R1M3 product if you install service pack SF56517 or later. However, if you’re planning on using Microsoft’s ADO 2.1 or 2.5 specifications, you will need to upgrade your V3R1M3 Windows 95/NT client software to Client Access for Windows 95/NT V3R2M0 or Express client. The V3R2M0 Windows 95/NT client supports ADO 1.0 in its

base version and adds support for ADO 1.5 and 2.0 when you install service pack SF55446 or later. In addition, the product can support ADO 1.5 and ADO 2.0 when you download and install the files in the IBM AS/400 SDK for ActiveX and OLE DB Service Pack 2 (which is available at www.as400.ibm.com/clientaccess/oledb/ServicePacks.htm). In addition to providing additional ADO support, service pack 2 provides fixes for the Visual Basic 6.0 (VB) incompatibility problems that have plagued the SDK and OLE DB provider since it was first introduced, including the ability to run the AS/400 SDK plug-in


inside the VB 6.0 Integrated Development Environment (IDE). There is a catch, however. Service pack 2 will only display the AS/400 SDK VB menu items in English, no matter what language was originally installed. Also, you may get an error message the first time you start VB after you install the plug-ins. This message may say that VB cannot load the old add-in and it may ask you if you want to remove the old add-in. If this occurs, IBM recommends that you answer "Yes." For instructions on downloading and installing the patch, see the Readme.txt file on that site. Also note that the SDK and OLE DB service packs are not being folded into the next Windows 95/NT V3R2M0 service pack (which was scheduled to be released on October 29, 1999). The AS/400 SDK for ActiveX and OLE DB and the OLE DB provider in the Windows 95/NT client have always been provided as "as-is" products that are not officially supported by IBM. As such, the patches provided by IBM for these products are considered separate service packs that are not covered under standard support. IBM offers a Client Access OLE DB support Web page (www.as400.ibm.com/clientaccess/oledb/comment.htm) where you can post question and comments, but you are not guaranteed a response.

As you can see, there are plenty of twists and turns with using IBM's OLE DB provider under Windows 95/NT V3R2M0.

For the latest information on VB 6.0 and SDK and OLE DB compatibity, see APAR II11869 "SDK for ActiveX and OLE DB-Compatibility with Visual Basic 6.0," at the Client Access for Windows 95/NT Informational APAR site.

For Express client, the picture is a lot brighter as IBM supports all current versions of ADO (versions 1.0, 1.5, 2.0, 2.1, and 2.5) as long as service pack SF57098 or later is installed on your PC. In Express client, the OLE DB provider and SDK for ActiveX and OLE DB have been folded into the Client Access Express Toolkit and they are supported by IBM. This means you can make support calls for the Express client version and all fixes will now be included in Express client service packs. The most significant problem with the Express client version is that it does not support VB 4.0. In addition, since IBM has frozen development on the Windows 95/NT client in favor of extending Express client’s capabilities, it appears that your best bet for maintaining complete compatibility with Microsoft’s ADO specification is to upgrade your PCs to Express client. However, not everyone is able or willing to upgrade to Express client at this moment so, if you want to use ADO 2.1 or above, you must at least be at V3R2M0 of the Windows 95/NT client. For the latest information on using IBM’s OLE DB Provider with ADO, see Information APAR II11872, “OLE DB Provider—Support for Microsoft Products and ADO Versions,” at the Client Access for Windows 95/NT Informational APAR Web site (www.as400.ibm.com/clientaccess/caiixd1.htm).

As to the ASP issue, it has been reported on Usenet (the public Internet newsgroups that can be found at comp.sys.ibm.as400. misc) that the IBM OLE DB provider has scalability problems, a fact that I have also noted in my testing. The OLE DB provider works fine during development, but it has problems in production, particularly when a large number of users access the Web server simultaneously. It almost seems as if the Client Access OLE DB provider serializes SQL requests rather than executing them in a multithreaded model; hence many requests appear to be pushed into a buffer and executed one at a time. My experience has been that there is a noticeable performance lag when many users are connected via IBM’s OLE DB provider and pounding a Web server vs. one or two users pummeling the server.

If you’re affected by any of these problems, you’re probably wondering who else makes OLE DB providers for the AS/400. In the rest of this article, I will discuss vendors and products that provide competitive solutions to the IBM OLE DB provider and how they can benefit your shop.

 

Some Alternatives

 

Amalgamated Software of North America, ASNA


You might be familiar with ASNA (www.asna.com) because of its Visual RPG product, but ASNA also makes an AS/400 gateway product called DataGate/400. DataGate/400 is a client/server product that allows for high-speed record-level access to AS/400 data. The DataGate/400 server piece sits on your AS/400 and is accessible via TCP/IP or Advanced Program-to-Program Communications (APPC) from the Windows client machine. Currently the company has an OLE DB provider for the DataGate/400 product in beta and it should be released by first quarter of 2000.

DataGate/400 is more than a gateway product as it has a companion product called Acceler8DB. Acceler8DB is a Windows implementation of the AS/400 DB2/400 file system. Using Acceler8DB and DataGate400 together allows a program to seamlessly talk to AS/400 file systems no matter where they are located, on a PC or on the AS/400. If propagating AS/400 databases into PC-land interests you, you should check these products out.

HiT Software, Inc.

HiT Software, Inc. (www.hit.com) makes two OLE DB access products for the AS/400: HiT OLEDB Server/400 and HiT OLEDB/400. HiT OLEDB Server/400 is an OLE DB provider optimized for Windows NT Server applications, such as Active Server Pages development. The provider supports multithread-safe execution and is able to communicate with your AS/400 via TCP/IP or APPC.

The package is available in a developer toolkit form, HiT OLEDB Server/400 Developer Edition, which contains a lot of example code for Active Server Pages and Visual Basic development. The code makes extensive use of the OLE DB provider and should serve first-time OLE DB users well by providing a host of examples.

When you buy the developer editions of HiT’s products, you also get powerful tracing and debugging tools and a neat SQL Package manager. The package manager makes life nice for the programmer by making it easier to deal with AS/400 package files that are created by the query optimizer.

The HiT OLEDB/400 product is an OLE DB provider for any 32-bit Windows platform. The only real difference between the HiT OLEDB Server/400 edition and this edition is that the OLEDB/400 product is not optimized for running on a Windows NT Server. HiT OLEDB/400 is also available in a Developer Toolkit form that, again, contains code samples for ASP or VB and the neat toolbox with tracing and debugging tools, just like the Server/400 edition.

For both products, HiT took the approach of communicating with the AS/400 Optimized Server (the QSERVER subsystem that Client Access also uses). The main difference between HiT and IBM is that HiT offers a more complete implementation of the OLE DB specification than the IBM OLE DB provider. According to HiT, most people buying their providers are either developing ASP scripts that need to access the AS/400 or need to connect Microsoft SQLServer to their AS/400(s).

For the security-conscious, HiT’s providers also offer support for encrypted communications via the Secured Sockets Layer (SSL) if you also purchase the HiT SSL Server product.

MetaWise Computing, Inc.

MetaWise Computing, Inc. (www.metawise.com) provides access to the AS/400 via its MetaWise DAO product. The OLE DB connectivity is provided in the MetaWise DP feature of MetaWise DAO. MetaWise DP allows for OLE DB access to the AS/400 and the execution of remote commands. Its one big drawback is that MetaWise DP only supports the APPC protocol for communications with an AS/400 host (no TCP/IP connections).

MERANT

MERANT (www.merant.com/datadirect/products/index.asp, the company formerly known as Intersolv), offers OLE DB access via its SequeLink OLE DB Edition product.


SequeLink OLE DB is server-based middleware that allows for connectivity with any level of Microsoft Windows operating systems via SNA or TCP/IP. The server component accesses the AS/400 file system directly, which cuts down on access to the system catalogue functions, thus improving performance.

Both the server and the client will automatically try to optimize network communications. If the client asks the server for 10 rows of data and the server determines that 20 will fit in the packet buffer, the server will automatically fill the buffer with the 10 additional rows and the client will cache them in case more rows are requested. The server also supports data compression for faster communications with dialup/internet-connected clients. In addition, the client will automatically defer communications with the server as long as possible, then bundle all requests in order to minimize required communications. Both the server and client also support encrypted communications for better security and they are firewall-enabled.

What is neat about their implementation is that the OLE DB provider is the same software—no matter what database you are connecting to. And MERANT offers support for 25 databases with this product. Also, if the SequeLink server is installed on your AS/400, connectivity with ODBC, JDBC or OLE DB is just a matter of client licensing as the one server piece supports all of MERANT’s connectivity options.

Microsoft

If you need SNA in your organization, you might already have SNA server installed. In addition to the other SNA networking services that Microsoft (www.microsoft.com/sna) provides, you also gain an OLE DB provider that provides access to AS/400 and VSAM files. Microsoft’s OLE DB provider for AS/400 and VSAM gives you record-level access and SQL access to both physical and logical files on the AS/400.

All access is managed through the Distributed Data Management (DDM) model and can only be achieved via an APPC connection to the AS/400. If this is not a limitation, it may be the way for you to go as the platform also sports other features for integrating PC technology with the AS/400 world. However, there is hope for TCP/IP shops. Microsoft’s new Enterprise InterOp Server (code-name Babylon, which is scheduled to currently be in beta testing) is built on Microsoft SNA Server and it is designed to provide integration with legacy servers, including AS/400. One of Babylon’s design specifications is that it will be able to run over TCP/IP as well as SNA, so the APPC-only limitation may soon disappear. Babylon is scheduled to be shipped with BackOffice 5.0, reportedly in the second quarter of 2000 (but this is a Microsoft shipping date, so there’s a very good possibility it will be much later).

 

IBM Ain’t the Only Choice

 

As you can see, there are options for AS/400 OLE DB connectivity other than Client Access. Some of these providers take a unique approach or implement features that are not available with IBM’s solution. Look at the features available, your project requirements, and the cost of the solution to determine which provider will meet your needs. As usual, healthy competition has provided the data consumer with a wealth of good, and, many times, superior alternatives to the IBM company line.


BLOG COMMENTS POWERED BY DISQUS

LATEST COMMENTS

Support MC Press Online

$0.00 Raised:
$

Book Reviews

Resource Center

  • SB Profound WC 5536 Have you been wondering about Node.js? Our free Node.js Webinar Series takes you from total beginner to creating a fully-functional IBM i Node.js business application. You can find Part 1 here. In Part 2 of our free Node.js Webinar Series, Brian May teaches you the different tooling options available for writing code, debugging, and using Git for version control. Brian will briefly discuss the different tools available, and demonstrate his preferred setup for Node development on IBM i or any platform. Attend this webinar to learn:

  • SB Profound WP 5539More than ever, there is a demand for IT to deliver innovation. Your IBM i has been an essential part of your business operations for years. However, your organization may struggle to maintain the current system and implement new projects. The thousands of customers we've worked with and surveyed state that expectations regarding the digital footprint and vision of the company are not aligned with the current IT environment.

  • SB HelpSystems ROBOT Generic IBM announced the E1080 servers using the latest Power10 processor in September 2021. The most powerful processor from IBM to date, Power10 is designed to handle the demands of doing business in today’s high-tech atmosphere, including running cloud applications, supporting big data, and managing AI workloads. But what does Power10 mean for your data center? In this recorded webinar, IBMers Dan Sundt and Dylan Boday join IBM Power Champion Tom Huntington for a discussion on why Power10 technology is the right strategic investment if you run IBM i, AIX, or Linux. In this action-packed hour, Tom will share trends from the IBM i and AIX user communities while Dan and Dylan dive into the tech specs for key hardware, including:

  • Magic MarkTRY the one package that solves all your document design and printing challenges on all your platforms. Produce bar code labels, electronic forms, ad hoc reports, and RFID tags – without programming! MarkMagic is the only document design and print solution that combines report writing, WYSIWYG label and forms design, and conditional printing in one integrated product. Make sure your data survives when catastrophe hits. Request your trial now!  Request Now.

  • SB HelpSystems ROBOT GenericForms of ransomware has been around for over 30 years, and with more and more organizations suffering attacks each year, it continues to endure. What has made ransomware such a durable threat and what is the best way to combat it? In order to prevent ransomware, organizations must first understand how it works.

  • SB HelpSystems ROBOT GenericIT security is a top priority for businesses around the world, but most IBM i pros don’t know where to begin—and most cybersecurity experts don’t know IBM i. In this session, Robin Tatam explores the business impact of lax IBM i security, the top vulnerabilities putting IBM i at risk, and the steps you can take to protect your organization. If you’re looking to avoid unexpected downtime or corrupted data, you don’t want to miss this session.

  • SB HelpSystems ROBOT GenericCan you trust all of your users all of the time? A typical end user receives 16 malicious emails each month, but only 17 percent of these phishing campaigns are reported to IT. Once an attack is underway, most organizations won’t discover the breach until six months later. A staggering amount of damage can occur in that time. Despite these risks, 93 percent of organizations are leaving their IBM i systems vulnerable to cybercrime. In this on-demand webinar, IBM i security experts Robin Tatam and Sandi Moore will reveal:

  • FORTRA Disaster protection is vital to every business. Yet, it often consists of patched together procedures that are prone to error. From automatic backups to data encryption to media management, Robot automates the routine (yet often complex) tasks of iSeries backup and recovery, saving you time and money and making the process safer and more reliable. Automate your backups with the Robot Backup and Recovery Solution. Key features include:

  • FORTRAManaging messages on your IBM i can be more than a full-time job if you have to do it manually. Messages need a response and resources must be monitored—often over multiple systems and across platforms. How can you be sure you won’t miss important system events? Automate your message center with the Robot Message Management Solution. Key features include:

  • FORTRAThe thought of printing, distributing, and storing iSeries reports manually may reduce you to tears. Paper and labor costs associated with report generation can spiral out of control. Mountains of paper threaten to swamp your files. Robot automates report bursting, distribution, bundling, and archiving, and offers secure, selective online report viewing. Manage your reports with the Robot Report Management Solution. Key features include:

  • FORTRAFor over 30 years, Robot has been a leader in systems management for IBM i. With batch job creation and scheduling at its core, the Robot Job Scheduling Solution reduces the opportunity for human error and helps you maintain service levels, automating even the biggest, most complex runbooks. Manage your job schedule with the Robot Job Scheduling Solution. Key features include:

  • LANSA Business users want new applications now. Market and regulatory pressures require faster application updates and delivery into production. Your IBM i developers may be approaching retirement, and you see no sure way to fill their positions with experienced developers. In addition, you may be caught between maintaining your existing applications and the uncertainty of moving to something new.

  • LANSAWhen it comes to creating your business applications, there are hundreds of coding platforms and programming languages to choose from. These options range from very complex traditional programming languages to Low-Code platforms where sometimes no traditional coding experience is needed. Download our whitepaper, The Power of Writing Code in a Low-Code Solution, and:

  • LANSASupply Chain is becoming increasingly complex and unpredictable. From raw materials for manufacturing to food supply chains, the journey from source to production to delivery to consumers is marred with inefficiencies, manual processes, shortages, recalls, counterfeits, and scandals. In this webinar, we discuss how:

  • The MC Resource Centers bring you the widest selection of white papers, trial software, and on-demand webcasts for you to choose from. >> Review the list of White Papers, Trial Software or On-Demand Webcast at the MC Press Resource Center. >> Add the items to yru Cart and complet he checkout process and submit

  • Profound Logic Have you been wondering about Node.js? Our free Node.js Webinar Series takes you from total beginner to creating a fully-functional IBM i Node.js business application.

  • SB Profound WC 5536Join us for this hour-long webcast that will explore:

  • Fortra IT managers hoping to find new IBM i talent are discovering that the pool of experienced RPG programmers and operators or administrators with intimate knowledge of the operating system and the applications that run on it is small. This begs the question: How will you manage the platform that supports such a big part of your business? This guide offers strategies and software suggestions to help you plan IT staffing and resources and smooth the transition after your AS/400 talent retires. Read on to learn: