Two weeks ago I had the good fortune to be at the Serena Customer Day in Frankfurt. There I was able to see the latest version of Dimensions CM demonstrated by Don Irvine, Senior Director of the Dimensions Development Team. After the event I sat down with him to ask him about the work his team had been doing on the performance of Dimensions 14.
KP: Great Demo Don. I heard you mention the great work you’ve been doing on performance of Dimensions. With super-fast computers and high-speed networks why is it still important to optimize for performance?
DI: The modern development environment has changed, not only do we need to delivery more changes faster than ever before, but we have to deal with our development teams being heavily distributed on a global scale. As an example, the Dimensions development team is split across two continents and multiple sites and several home workers for good measure.
KP: How did you determine when you were fast enough?
DI: Good question! When we started CM 14, we set ourselves a goal of being able to match the performance of simple distributed version management tools whilst, at the same time, providing the richness of features and benefits of a centrally managed repository. What we came up with was a clever caching technology that we call the Personal Library Cache Directory (PLCD) which, when coupled with a new and really innovative delta transfer technique, has literally supercharged our file transfers.
KP: That sounds impressive. Do you have metrics you can share?
DI: Earlier this week I got to see the results of these changes, and the performance is truly breathtaking! Our own development server is a Dimensions CM server of course. The produiction instance of that server is located in Oregon, on the West Coast of the United States, but my development teams are based in around the world with most being in our centers in St. Albans in the UK and in Kiev in the Ukraine. This network topology results in my teams having both limited bandwidth and high latency (ping time in excess of 200ms) to the Dimensions server. The entire source code for Dimensions CM is close to 40,000 artifacts and is just over 1.3GB in size. On a busy day when Dimensions CM version 12.2.2 was our production server the fetch of all the source code, using a Library Cache in our European data center, would take over 200 seconds. For developer who were home based and not using the Library Cache it could take in excess of 20 minutes. Now with CM 14 this same operations takes around 70 seconds.
KP: Don, that is really impressive. How does that compare to those simple versioning systems like SubVersion?
DI: We did do some benchmarks against SubVersion and GIT. In comparison the same fetch from Subversion took over 40 minutes to complete (KP: wow!), and from Git took 53 seconds but our instance of GIT was a clone of a local repository.
KP: So having a Dimensions repository hosted on the other side of the World now gives similar performance to having a distributed repository on your local machine?
DI: Exactly. But we’re not stopping there. Last week my team came to me with even more ideas for making Dimensions even faster still in the next release!
KP: Don, this is great. Congratulations to you and your exceptional team. Thanks for taking the time to chat with me today.
We are excited to announce that Serena’s xChange15 will be from Sunday March 22nd until Wednesday March 25th 2015. We are bringing xChange back to the east coast and will be in the wonderful Washington D.C. area in time for the First Day of Spring and the world-famous Cherry Blossom Festival. So mark your calendars today! We’ve selected the prestigious Ritz-Carlton at Tyson’s Corner for the event and we have secured an amazing rate for the accommodation there.
This year we will be focusing on number of critical IT issues and we will be showcasing our latest innovations in Release Management and Release Automation. We also bringing news and updates to our product line and will be launching exciting new releases first at xChange!
We will have more than 60 specialist sessions delivered by you, our customers and partners, as well as by the amazing technical teams from R&D, Customer Support and Professional Services. Deep dive, hands-on and advanced topics will, once again, lead the content making xChange the most valuable three days you can spend.
We are looking for speakers right now to deliver the intensive sessions and we invite you to contribute around the topics of:
The usual and unique features of xChange will be back including the now famous AnswerZone with its intense one-on-one consulting sessions and the Birds-of-a-Feather lunches. In addition this time we are introducing Ignite Sessions and more dynamic, customer-led discussions. You’ll hear Serena executives as well as all the technical leadership describe the direction we are forging as the leader in Application Change, Release and Configuration Management and you will be able to interact with them in private briefing sessions throughout the conference.
Check here for more details and how to register. We will be posting regular updates such as the Agenda, Breakout Sessions, Training Sessions, Hotel Info, Special Events, Expo and Exhibit Hall, and more.
If you have ideas for presentations you want to give or if you have questions you want answered please drop me a note and I’ll share them with the xChange team.
I’m really looking forward to seeing you again at xChange15.
Next month I will be presenting at the SHARE conference in Pittsburgh. The bi-annual event is the place to be to learn about the trends and tricks for developing modern applications on the mainframe.
No one knows better than the army of Change and Release Managers that guard the mainframe environment, just how risky it is to change anything on the mainframe. And no one knows better than they just how business threatening it is not to keep pace with the market and customer needs. Balancing these two forces has been at the heart of the mainframe world for 5 decades now.
My presentation takes a look at how the world of “change” (in all of its forms and meanings) is changing and suggests that we need to change the way we think about and react to change. If you would like to watch the presentation you can attend in person or you can watch it online on the SHARE website. After the conference the presentation will be available on the SHARE website and I will post the presentation here also.
As well as exhibiting at the conference we will be meeting with many customers to share one-on-one briefings about the exciting new version of ChangeMan ZMF that will be available later this year. If you’d like to schedule a one-on-one briefing please let me know by emailing me at firstname.lastname@example.org.
The annual DefenceIT conference concluded this week at the Defence Academy in the UK. More than 250 uniformed and civilian technology leaders gathered to talk about the intersection of business solutions and battlespace technology needs.
Defence spending reductions and the prospect of no active engagements beyond December 2014 are reshaping priorities in the UK Ministry of Defence. This is leading to rebrigading (reallocating brigades resources into fewer organizational units) which has the most immediate impact on the armed forces. However this has the potential to move the focus away from preparing for future mission profiles Her Majesty’s armed forces may be tasked to do.
The massive effort of repatriating war-fighters and their materiel from Afghanistan is well underway. However with billions of pounds worth of equipment and only a few months to complete the redeployment before winter comes, the logistical complexity is huge. Ensuring that vital, sensitive and strategic materials are shipped with priority and shipped securely is just as much of a challenge as shipping the more mundane. The added complexity of an uncertain outcome to the current Afghan elections brings a special frissance to the expression “mission critical.”
Serena’s presence once again underscored our commitment to supporting our military uniformed and civilian customers as well as our defence contractor partners. Just like our business customers, the pace of change and the imperative for compliance has reached the point where failure is not an option. Technology underpins both peacetime and wartime effectiveness. Our solutions are used today to manage fighter configurations, provide rapid deployment of helicopter spare parts in the theatre of operations, manage development and deployment of software applications by security services and more. Serena is proud to support the men and women serving around the world who keep the peace and establish global security.
If you have stories around how technology is helping make the world a safer, more secure place, please share in the comments.
So you have all your source code under change control. If it’s under control of ChangeMan ZMF you are in the best hands possible.
But what about all those other datasets? How do you control the changes to the SYS1.PARMLIB? How would you know if an authorized application updated SYS1.LINKLIB? How do you keep changes to SYS1.PROCLIB in step on every image?
It’s not only SYS1.** but what about the configuration datasets for CICS, IMS, DB2 and for Websphere? There are thousands of datasets in our infrastructure that are not under any form of change control other than through the security access controls of RACF, ACF2 or Top Secret.
Of course, secure access control is usually enough but errors do occur and they can go unnoticed for hours, even days before their effects are discovered. This is why you need to put your system files under change control too; but a new kind of change control that meets the dynamic needs of systems programmers and the risk parameters of the business continuity team.
ChangeMan SSM provides real-time tracking of system datasets. The systems programmers choose which ones and report changes as they occur. Changes are noted and stored away in a dataset. In the future, those changes can be reviewed and, if needed, can be restored to their original state through a very simple online interface. Of course, the changes can be propagated to other systems too if they are needed elsewhere, thus making multi-system changes easy.
I trust that all of our customers that attended xChange13, Serena’s global user conference, are back in their offices implementing one or more valuable tips they learned from the conference. And I know there wasn’t any shortage of great information delivered, especially from the Mainframe product team.
The most highly anticipated and rated session at xChange13 came from Bob Yates, Mainframe Account Manager, who showed off the new migration utility. Customers who have old repositories in products that are no longer supported are feeling exposed and left behind. Many of them face serious audit finding when the state of these repositories are discovered. The new migration utility pulls out the code, the relationships, the histories and the version from old repositories from CA-Panvalet, CA-Librarian and CA-Endevor. Along the way it validates the repository and fixes the errors it inevitably finds.
Also in the mainframe track, veteran users showcased how to get the most out of their solutions by taking the technology to new levels. R&D introduced the 2014 roadmap and showed off some advanced features that are coming soon while partners shared how to exploit the Serena mainframe ecosystem. With every session filled and positive feedback received, the mainframe track was, once again, the place to be at xChange13.
Our customer presentations really set the tone for the track. Prakash Balakrishnan, from Nationwide Insurance, showed how they were making use of off-host development by exploiting the client-pack. This was followed by Serena’s Bob Yates describing all the other capabilities that Client Pack had to offer. Long-time user and ChangeMan ZMF guru, Michael Bailey of MetLife, laid out a comprehensive plan of user configurable tweaks that make administration as easy as possible. Many of these great ideas will, one day I’m sure, find their way into the product.
Thank you to all of our customers and partners for informative and entertaining presentations. Liberal sprinklings of Belgian chocolate and a cool demo are always crowd pleasers. If you missed xChange13, contact me and I will be happy to share the presentations with you. Or watch the xChange13 playlist on YouTube to see some of the main stage presentations.
It used to be that the mainframe was an island of technology just as much as the PC once was. But we have seen that distinction blur and nowhere more so than in the world of software development.
Today’s mainframe programmers are just as much at home writing in Java and C as they once were writing in COBOL and PL/I. They are happy editing, compiling and testing in TSO/ISPF on a green screen or debugging, optimizing and tuning in the GUI of Eclipse.
Even the execution environment has morphed into an array of choices that are designed to match the profile of the application and the user experience. z/OS is happy serving up web pages and z/Linux can be your transaction processing hub, Unix System Services (USS) might host your data while CICS serves up web services.
The freedom to select our technology topology to suit our business and application needs is very liberating. But there is a price to pay. Managing all this code and ensuring the integrity of those myriad of pieces is complex. This is why Serena introduced the ChangeMan ZMF Client Pack (screenshot above) and added support for z/Linux and USS deployments.
The Client Pack is designed to provide developers with the ability to use the same Software Change and Release Management solution they have always used, ChangeMan ZMF, whether they are developing in Eclipse or an Eclipse-based IDE like Rational Developer for z/Series (RDz) or Windows IDE’s, such as the ones from Micro Focus. Simple plug-in technologies instantly make the ChangeMan ZMF repositories available on your chosen platform with full access to the code you are working on and the ability to manage the change packages right there from the software menus.
Support for long filenames and member names was introduced into ChangeMan ZMF two versions ago to enable developers who want to write in Java and C for the mainframe to do so under full change control. Developers can see the full 1024 byte file names and 256 byte members names on the mainframe and from their Eclipse, or Eclipse-based, IDE’s. This makes ChangeMan ZMF the only solution to give developers complete access through one technology. The previous version of ZMF added support for Hierarchical File System (HFS) used on USS and z/Linux File System (ZFS), which means your release can con now be deployed to all the mainframe platforms from one solution.
So whatever your development or execution environment, only ChangeMan ZMF supports where you want to be for all your developers and their applications.
In a very unscientific survey of more than 60 release management customers over the past 18 months, the winner in the “Largest Gantt Chart” award came in at 2.5 meters wide (8’ 2”) by 1.5 meters tall (4’11”) with over 90 “deployment tracks” covering the 68 hours of the “go live deployment weekend” or “GLDW.” One whole track was devoted to catering and it was on the critical path. More than 400 people are involved in the GLDW from noon on Friday until 8:00 am on Monday morning. This happens four times a year and many of the 400 employees spend at least one, sometimes two, nights sleeping at their desks.
Releases have become, for many organizations, more complicated than NASA space launches. And, just like John Glen, you too are now “sitting on top of two million parts … all built by the lowest bidder.” The complexity of releases today is vast when you consider the requirement to deploy software to multiple platforms and geographies. What’s more, that software comes in a myriad of technologies (many of which you have no visibility into and little control over), is developed from a variety of methodologies, and is managed across countless organizations. For many of us, managing this means spreadsheets and project plans, endless meetings and a deluge of email.
Today’s sophisticated, interdependent releases can only happen when you have the infrastructure that allows you complete visibility into the moving parts of the release and the tools that ensure coordinated movement through the lifecycle. At Serena, we have taken this need to the next level by developing the world’s first and leading Enterprise Release Management solution that spans your platforms, connects yours teams, manages your calendar and coordinates your deliverables. Working in concert with our proven Change and Configuration Management solutions on the Mainframe (ChangeMan ZMF) and on Open Systems and Windows (Dimensions CM), Serena Release Control not only gives you the flexibility you need to allow your teams to work in the way that best meets the business needs but also brings coordination and control to make sure they arrive at and depart from release milestones as expected.
By exploiting the open, web services-based architecture of our product set, Serena is able to manage your releases, even if you are using third party source-management solutions. We provide the upstream and downstream visibility needed by everyone from request-to-release and from Dev to Ops, including the ability to fully automate the deployment and handle exceptions.
So, if you are spending your next weekend in the office shepherding your next quarterly release, perhaps you should check the DevOps Drive-In Webcast series, past and upcoming. What you learn might just be able to give you a good night’s sleep.
One of the most hilarious presenters in the technology community is George Spalding of Pink Elephant. As Executive VP, he also has a serious side and is one of the primary authors of ITIL version 3. Day two of the conference started with George looking back at the state of release management since Y2K and then he abruptly brought us up to date with the challenges that we face in a mobile-to-mainframe world. Watch the video to the right.
Peter Sianchuk, Serena’s head of customer experience, talked about the award-winning support organization and innovations they are introducing to make the service they deliver better.
Traditionally, day 2 is also the day for recognizing customer success and exceptional use of Serena’s products. This year’s winners are:
Congratulations to the winners once again. See my blog post about this announcement, which includes photos of the winners.
The day completed with a traditional Miami Beach party, complete with salsa dancing and cigar rolling.
Day one started with a bang! In a new format, xChange13 got right down to business at 8:00 AM on Monday. Serena President and CEO Greg Hughes immediately set the tone and vision of the conference. Watch the video to the right. He talked about the challenges facing the industry as we navigate through releasing applications with greater velocity and greater throughput 24×7 under never-before pressure to meet time-to-market, compliance and control needs.
Serena’s head of development laid out the future of the product set and highlighted many of the cool new features that are in the upcoming releases. The common threads of greater accessibility, closer collaboration and more automation were reflected time and again as Serena’s solutions continue to evolve as the premier solution for enterprises who are serious about release management.
The Monday keynote presentation was delivered by Damon Edwards from DTO Solutions. Damon is a famous podcaster and author on the world of DevOps and one of the founders of the DevOps movement. He set the record straight: DevOps is not something one can buy, but it is something one can be. He made it clear that People and Process trumped Technology and that all successful DevOps initiatives come from a change in culture that pervades the organization from the leaders in the business to the practitioners in the data center. Watch the video of his presentation!
The day closed with the traditional Partner Reception and the room was abuzz with talk about the exciting challenges ahead.