Modificado em por DavidT
With a mere 4 weeks until IBM's 2013 Information on Demand, the data replication team thought it might be helpful to have a complete listing of all data replication sessions at IOD. From client presentations and our product roadmap to sneak peeks at new IBM Data Replication functionality, our sessions run the gamut!
Simply take a gander at the sessions below then go to the IOD agenda builder, click on Create Sign In, and then enter your confirmation number and the email address that you used to register for the conference. Create your agenda today!
This post is the answer to one of the FAQs found in License Tips for IBM Data Replication
If you download IBM products from Passport Advantage (PPA), you may now have access to IIDR but don't know why. The reason may be that all of the following conditions are true for your shop:
- You had an older IBM replication product on UNIX, Windows, or System i.
- You were current on S&S (subscription and support).
- You were unaware of the automatic conversion to IIDR on March 12, 2013 :)
If you don't understand, keep reading... In December of 2012, IBM announced that it would no longer market the following three data replication products after March 11, 2013:
- InfoSphere CDC
- InfoSphere Replication Server
- InfoSphere Data Event Publisher
The announcement also said that IBM InfoSphere Data Replication (IIDR) would be the replacement product. IIDR contains all replication technologies from all three of the older products
. However, the announcement did not say how you get IIDR if you already own one or more of the older products. Well, it turns out that IBM automatically converted your older product(s) on UNIX, Windows, or System i to IIDR on March 12, 2013 as long as you were current on S&S. There was no announcement. The only way you'll see this is if you look in your PPA account. It should now list IIDR.
If you are unfamiliar with IBM's changes to its data replication portfolio, see either of the following posts for more information:
Feel free to post comments if you have questions.
The absolute best answer to this question is in the IBM Distributed Software Licensing Reference Guide. It can be downloaded from the Passport Advantage Licensing home page on ibm.com
(see picture below). The document contains a general discussion about Hot, Warm, and Cold Standbys for IBM distributed software. While it does not mention IBM InfoSphere Data Replication (IIDR) specifically, the discussion applies to IIDR because IIDR does not have its own unique license terms in regards to standby servers. If you read the guide and have a question in relation to IIDR, feel free to post it in the comment section of this blog entry.
The following is an excerpt from that document as of the date of this post. It's just here just to give you a feel for what to look for in the Reference Guide. You shouldn't view this post as a replacement for reading the Guide since the Guide could change .
IBM's Data Replication
product (IIDR) is now part of IBM's Request for Enhancement (RFE) community
. This gives you [the customer] an opportunity to collaborate directly with the IBM product development teams and other product users. That's a quote from the RFE Community site. If you're not familiar with RFE, the site's main page has FAQs, tutorials, and more to help you get started. Once you're ready to go, InfoSphere Data Replication is found under IBM's Information Management brand
along with products such as DB2 for z/OS. From the RFE main page, simply click on "Information Management" in the "Brands" box on the right After that, you'll see a pull-down that will let you select IIDR. Click the arrow on the right. Once you have IIDR, click Submit RFE:
If you browse IIDR requirements today (as of this post), you'll only see a few RFEs since this is new. You change that by submitting a requirement :) Once you start that process, you'll need to select a component and so on. The following screenshot shows some of what you'll need to provide:
Notice that the components are not specific to a technology such as Q Replication or CDC. You can add information about that in the description or use case. Have fun :)
I've gotten this question a lot lately. It's usually from people who want to move from DB2 ESE to DB2 Advanced ESE (AESE). They want an answer from both a technical perspective (will I need to migrate?) and a licensing perspective (do I still need my current replication product?). The answer to these questions, like the answer to so many other questions, is :) "it depends." I'll use this post to cover the points from both perspectives.
You need to answer one question - are you changing versions of DB2 when you upgrade to DB2 AESE? For example, are you moving from DB2 ESE 9.7 to DB2 AESE v10? If the answer is, no, you are not changing your DB2 version, then the answer to the Q Replication question is, no, Q Replication is not affected by the upgrade to DB2 AESE. This is because AESE changes DB2 license terms related to Q Replication, not the DB2 install, the Q Replication code, or the DB2 function that Q Replication uses.
On the other hand, if your answer is, yes, you are changing DB2 versions, then the change will likely require a migration of Q Replication. To know for sure, you need to consider whether you're using the copy of Q Replication in your DB2 install or a separate copy of Q Replication that was installed through a product such as InfoSphere Replication Server (IRS) or IBM InfoSphere Data Replication
- The other case is that the you installed a separate copy of IRS or IIDR and are using the Q Replication in it to work with your DB2 instance. For this case, the Q Replication code only needs to be upgraded if it is capturing changes from DB2 v10 (applying changes to DB2 is not affected). Again, see the DB2 v10 Information Center for information about upgrading/migrating Q Replication.
One of the major benefits of upgrading to DB2 AESE is that you get two- or three-site Q Replication at no additional cost. That's important to licensing because, before DB2 AESE, you had to purchase Q Replication for DB2 through one of three products - the IBM Homogeneous Replication Feature (HRF), InfoSphere Replication Server (IRS), or IBM InfoSphere Data Replication (IIDR). The question is - do you still need to maintain a license for a data replication product? The answer depends on the configurations you've built with Q Replication. Specifically, the DB2 AESE license covers your current Q Replication needs for a given DB2 AESE server if you are using the Q Replication in DB2 AESE and one of the following is true:
- Your DB2 AESE server is 9.7 and you are only replicating with one other DB2 LUW server (of any release).
- Your DB2 AESE server is v10, and you are replicating with no more than two other
DB2 LUW servers (of any release).
In the past, IBM always announced a new release of its Replication Server product on UNIX and Windows whenever it announced a new release of DB2 LUW. If the version changed, IBM also updated the version of Replication Server on z/OS. Neither of those changes happened when DB2 LUW v10 was released. What's more, IBM announced in late 2012
that its older data replication products, including Replication Server, would no longer being marketed. So, why's IBM doing this? And what happens to Replication Server's Q and SQL Replication?
Well, over the years, IBM provided its data replication technologies
through a lot of different products. For example, IBM had two major data replication products at the same time for several years - InfoSphere CDC and InfoSphere Replication Server. That was a little confusing,
even to some IBM people. To simplify sales, IBM consolidated all it's replication technologies into a single product called IBM InfoSphere Data Replication
(IIDR). This means that IBM didn't need to continue offering those technologies through the older products (InfoSphere CDC and InfoSphere Replication Server).
- Are the older products still being supported?
- Is IBM still providing the IIDR's Q and SQL Replication at no cost in certain DB2 LUW and InfoSphere Warehouse (ISW)?
- How do you upgrade from your old Replication Server on UNIX or Windows to IIDR?
- How do you upgrade your Replication Server on z/OS to IIDR?
If you have any questions, feel free to post them in the comments section of this blog.
Over the years, IBM has provided its data replication technologies through a lot of different products. That can be a little confusing, even to some IBM people :) So, to simplify things, IBM has consolidated it's replication technologies into a single product
. It's called IBM InfoSphere Data Replication (IIDR). To go along with that, IBM is also reducing the number of products it uses to sell those technologies. That affects the IBM Homogeneous Replication Feature (HRF) for DB2.
To be clear, the HRF was an alternate way to buy Q Replication
for DB2 LUW and InfoSphere Warehouse (ISW), 9.5 and 9.7. That is no longer available for new purchases. The same is true for v10. The affect on you depends on whether you are (1) new to Q Replication with DB2/ISW or (2) an existing 9.5 or 9.7 HRF customer:
- If you are new to Q Replication, you have two choices:
- Upgrade to DB2 Advanced ESE (AESE) or ISW. This the best alternative if all of your replication is between
DB2 LUW and/or ISW servers and your configuration meets requirements. For more information, see the post titled Is Q Replication Free?
- Purchase IIDR*. You will need IIDR if your DB2 LUW replicates with DB2 z/OS, a heterogeneous source or target (e.g., Oracle), or with more sites than allowed by DB2 AESE or ISW.
- If you are an existing HRF customer, you can still buy support ("S&S") for it and activate in DB2 LUW v10. You also have the option of trading up to the full IIDR product. You can do this with a special trade-up feature (part number D0P64LL) that was added to IIDR in its 10.1.3 announcement.
* Alternatively, InfoSphere Replication Server (IRS) is still available for use with DB2 LUW 9.5 and 9.7. However, IRS is not available for DB2 LUW v10. You must use IIDR with DB2 LUW v10.
I recently posted a white paper on developerWorks
and a blog on ChannelDB2
that talk about using Q Replication with HADR. One obvious follow-on question is the title of today's post. People want to know what they need to purchase to be in compliance with IBM license terms* when they use Q Replication with HADR.
The best answer is found in the IBM license information document for the product that provides you Q Replication (remember that Q Replication comes in several different IBM products). These documents are maintained on ibm.com. However, most people don't know how to navigate them :) so I'll provide links to the most current (as of this post) for each product** and my reply. I'll also use the following picture. It came from the previously-mentioned white paper and blog.
Replication Server has Hot, Idle/Warm, and Cold Standby terms as do DB2 and InfoSphere Warehouse. Data replication products cannot process transactions on an HADR secondary. That means the HADR secondary is a Cold Standby from Replication Server's perspective. You need to purchase Replication Server for the HADR primary, but not the secondary.
IBM InfoSphere Data Replication (IIDR) 10.1 is a packaging of InfoSphere CDC and InfoSphere Replication Server
. The IIDR license basically says that it provides unrestricted use of these two products and that the terms in those licenses apply unless overridden by IIDR's. In the case of HADR, the Replication Server Hot, Idle/Warm, and Cold Standby terms apply to Q Replication. That means you have the same answer that I wrote for Replication Server above: Data replication products cannot process transactions on an HADR
secondary. That means the HADR secondary is a Cold Standby from
Replication Server's perspective. You need to purchase Data Replication for the HADR primary, but not the secondary.
If you have questions, feel free to post them to the message board of this group.
While it's true that DB2 z/OS v7 has been out of service since 2008
, that doesn't mean no one's using it :) We know because we regularly get questions about whether any IBM data replication product still supports it. Some people want to use replication as a database migration tool (e.g., for moving from for DB2 v7 to DB2 v9). Others just want a typical data replication solution such as copying data to another system for reporting purposes. Whatever the situation, IBM provides WebSphere Replication Server for z/OS v9 (5655-R55) to support DB2 z/OS v7
. You can use either Q or SQL Replication*. These are both compatible with with the Q and SQL Replication found in newer versions of IBM replication products. For example, you could replicate data between DB2 z/OS v7 and DB2 z/OS v10 by having WebSphere Replication Server v9 running with DB2 v7 and InfoSphere Data Replication v10 running with DB2 v10. Here's a picture of what that looks like:
Note that IBM's newest replication product, InfoSphere Data Replication for DB2 for z/OS v10
, does not support DB2 z/OS v7. The same is true of latest versions of InfoSphere Replication Server for z/OS and InfoSphere Change Data Capture for z/OS, both of which are part of the new Data Replication product. Neither support DB2 z/OS v7.
* Both Q and SQL Capture work with z/OS V1.4 as well.
This post is not
about whether you need some kind of event publishing* function for DB2. It's about whether you already have the function found in InfoSphere Data Event Publisher and just don't know it.
InfoSphere Data Event Publisher is built from IBM's Q Replication technology. More specifically, it provides a subset of the function found in the Q Capture program. The question is, if event publishing is a subset of Q Capture and I already have Q Replication, do I need to buy Data Event Publisher? The answer is almost always no. Why "almost always"? Q Replication is found in several IBM products and features
. For example, no-cost, two-site Q Replication
was recently added to certain editions of DB2 and InfoSphere Warehouse. Some of these products have license restrictions on how Q Replication function can be used. I have the products listed here along with the answer about whether you need to buy Data Event Publisher with it:
- InfoSphere Data Replication or InfoSphere Replication Server - No.
- You do not need to buy Data Event Publisher. The function is included in all Replication Server products. This is true for z/OS and LUW. The LUW product can publish from Oracle sources as well.
- The IBM Homogeneous Replication Feature - Maybe.
- Event publishing for DB2 databases is included. However, if you want to publish from Oracle sources, you must buy either InfoSphere Data Event Publisher of InfoSphere Replication Server.
- The free two-site Q Replication in DB2 and InfoSphere Warehouse - Maybe.
- Event publishing can only be used to set up replication of data from one DB2 LUW database to another. If you want to publish changed data for any other destination, you must buy either InfoSphere Data Event Publisher or InfoSphere Replication Server.
Wait... what? I can do replication with Q Capture's event publishing? Yes :) but the primary reason you would consider this is when you want to run data through a transformation engine such as InfoSphere DataStage and don't want to run an apply program at the target or stage data in tables or files. The following picture shows an example of what I mean:
* For those of you who aren't sure what data event publishing is, it's function that lets you capture changed data from a database log and publish it to consuming applications. The format of the published data is such that you can determine transaction boundaries, see the SQL operations (insert, update, delete) as well as the order they occurred, and have both before and after values for updates. Depending on the tool you use, data can be published to relational tables, WebSphere MQ, or flat files. The consuming app (or apps) can be one you develop such as for SOA or an off-the-shelf app like InfoSphere DataStage.
This post focuses on publishing to WebSphere MQ queues because that's what's found in InfoSphere Data Event Publisher.
(Oh, I can hear the outcry now... people saying that no one's ever used the term event publishing when the destination is tables or files. Seriously? Those are just staging mechanisms. They don't change the end result. You still get data events published. And those events are still available to consumers. For comparison, see the IOD 2010 presentation about providing changed data to InfoSphere DataStage via tables
The answer depends on your configuration.* Specifically, where you plan to run SQL Replication's Capture and Apply programs. I'm using this post to document the basic answers for future reference. I'll cover three scenarios:
- From DB2 z/OS to DB2 LUW - Capture on z/OS, Apply on LUW (a 'pull' configuration)
- From DB2 LUW to DB2 z/OS - Capture on LUW, Apply on z/OS (a 'pull' configuration)
- From DB2 LUW to DB2 z/OS - Capture and Apply on LUW (a 'push' configuration)
There is one other configuration possible. I will not discuss it here because it is very rarely used:
- From DB2 z/OS to DB2 LUW - Capture and Apply on z/OS (a 'push' configuration)
For those of you who don't know what 'push' and 'pull' mean, these are simple concepts:
- Push - Apply runs on the source system and pushes changes across the network to the target database.
- Pull - Apply runs on the target system and pulls changes across the network from the source system.
Each section has pictures that illustrate push and pull.
From DB2 z/OS to DB2 LUW, Pull Configuration
In this configuration, SQL Capture runs on z/OS and SQL Apply runs on UNIX or Windows. SQL Apply 'pulls' changed data from DB2 z/OS to DB2 LUW:
You need two things in addition to DB2 z/OS and DB2 LUW:
- IBM's InfoSphere Data Replication** (IIDR) for DB2 for z/OS
Either (a) IIDR** for UNIX and Windows or (b) DB2 Connect
- This contains the SQL Capture program.
- SQL Apply needs client-server connectivity to DB2 z/OS. This is provided by DB2 Connect.
- If you have an installation of DB2 Connect, you can use it. Otherwise, you can use IIDR for UNIX and Windows because it includes DB2 Connect for data replication purposes.
From DB2 LUW to DB2 z/OS, Pull Configuration
This is the same configuration as the last except SQL Capture now runs on UNIX or Windows and SQL Apply runs on z/OS:
You need IBM InfoSphere Data Replication (IIDR) for DB2 for z/OS** so that you have SQL Appy on z/OS. However, you do not need DB2 Connect for this configuration. DB2 Connect is not needed when z/OS clients access a DB2 LUW server.
From DB2 LUW to DB2 z/OS, Push Configuration
In this configuration, both SQL Capture and SQL Apply run on UNIX or Windows:
You need the following in addition to DB2 z/OS and DB2 LUW:
- Either (a) IIDR** for UNIX and Windows or (b) DB2 Connect
- SQL Apply needs client-server connectivity to DB2 z/OS. This is provided by DB2 Connect.
- If you have a installation of DB2 Connect, you can use it. Otherwise, you can use IIDR for UNIX and Windows because it includes DB2 Connect for data replication purposes.
People tend to run this when (1) they have a low volume of changed data, say only 100's of rows of per minute, and (2) they only want to install and manage replication on a single system. A push configuration is never recommended for high-volume environments because inserts, updates, and deletes are pushed across the network one at a time. They are not grouped or 'blocked' as query results are (i.e., with a pull, a query goes across the network and all eligible changed data is typically returned in blocks of rows via DRDA).
** This used to say you to need WebSphere or InfoSphere Replication Server on z/OS. It had features that included SQL Replication. You can still use these if you have them. However, Replication Server has been replaced by IIDR