Over a year ago we realized that the DBA team spent a very long time digging through data we had everywhere, counting billions and billions of rows for various systems, and that needed to be beautified in Excel with charts and the whole nine yards to be delivered to business owners.
That prompted us to take the decision and move to the next level. At the beginning, we called it our future Data Warehouse, then DataMart (as we were going to start with just one subject area), then Reporting Solution and finally decided to just call it “Business Intelligence”.
To speed up the process, we hired 2 consultants. A Data Analyst and a BI Architect. Everything started pretty good on the first week by deciding on what needed to be done first for us to start gathering requirements. Unfortunately other high priority tasks took over and the Data Analyst switched their duties to something else. That left us with just one BI Architect.
Anthony Sammartino (Twitter | Blog), of TekPartners Business Intelligence Solutions, assumed the role of Data Analyst, Project Manager and BI Architect. This was not easy as he needed to spend time creating proper questionnaires and meeting with different business owners to start gathering requirements. Then he needed to come up with proper schedules and plan the work.
As not everything worked according to plan (business owners needed to prioritize other work) we could not gather enough requirements from all of the different businesses. Plus there was still this fuzzy understanding of what BI meant.
We approached a different strategy and started pinpointing the type of reports that were generated mostly from the transactional data. Anthony came with the great idea of replicating it to a new DB instance and let our users connect and just query it all day long. We setup a dedicated Distribution and Subscriber Servers under SQL Server 2008 Evaluation Edition. We named the Subscriber our Operational Data Store (ODS).
As we continued moving data from different Publishers we realized that the ODS had become a somewhat important system as more users started using it, and even the DBA team realized that was easier to join data from multiple businesses in one instance. We were still in Beta phase as we needed to prove that this was a viable purchase.
Then SQL Pass Summit 2009 came by, I went to Seattle, learned a ton of new stuff about Performance Tuning and BI. I came back to Florida and planned a migration of our Distribution and ODS to SQL Server 2008 R2 November CTP Edition. I had just two things in mind, PowerPivot and the new features provided by Reporting Services.
We executed the plan, rebuilt both servers with the latest CTP release, re-installed the SSL certificate for SSRS and we were done. This was performed on a weekend and was completely transparent to the end users.
We continued working with this environment, faced some challenges with multi-million row partitioned tables with no primary keys which could not be replicated, with the lack of redundancy and of course the CTP edition we were running on. But again, this was still in a Beta Phase.
Months came by, we continued deploying more subscribers, enhancing transactional reports and enabling filtered indexes and compression on our ODS to reduce the amount of I/Os.
A decision was taken as we wanted this system to go live with the RTM version of SQL Server 2008 R2. Licensing was purchased and new a hardware was queued up to be purchased later.
While this happened, we focused our efforts again on BI. We brought in Robin Haropulos from TekPartners. She eventually assumed the Project Manager Role and concentrated on one of our largest business units. The one that brought in 100 million records a day.
The team sat down with the business owners, end users, analysts and pretty much everyone that accessed that data, crunched from legacy transactional systems.
I decided that we needed a good ETL resource that knew SSIS inside and out. Luis Figueroa (Twitter| Blog), also from TekPartners, came on board, and while he was not yet an expert, he proved to us that he could master it in a matter of months. I bet on that and thankfully I was right.
I also wanted to have an additional resource on board who had a good knowledge on replication and the need to learn SSAS. Rich Bartho (Twitter| Blog) switched his main duties and started helping us out on this new project.
We came up with 28 dimensions, and 4 facts for the first release. We made sure the SSIS performed all its transformation as an isolated entity and only touched the source to extract the data. We also took advantage of Change Data Capture and Replication in order to have the systems pull from a replicated site instead of the main source and minimize production overhead.
After the BI architecture design, project plan, and first fact and dimension requirements were complete, Anthony trained the entire team in the areas of SSAS cube design and development, Replication design, and BI Project Management to ensure we were on the correct path to complete the project successfully before he completed his assignment with us at Mediawhiz. I quickly moved another resource, James Yagielo (also from TekPartners), to help us out with the ETL packages. The project was running on track, the Infrastructure team finalized with the build of 4 new instances and a High Availability Active/Active Cluster with plenty of RAM and I/O to spare. We were hooked up to 48 spindles and 3 GB/s teamed dedicated network connections to the SAN. They also took care of the Reporting Services instances and created 4 VMs.
We went ahead and soft launched over 10 days ago, fired up a new distribution instance, a ODS/Historical instance, Dimensional instance and of course the SSIS/SSAS dedicated box. This solution can scale to multiple nodes if additional CPU cycles are required; one of the advantages of clustering. Reporting Services was launched as a scaled out deployment into multiple VMs and load balanced by F5.
We ensured that all the data was consistent, checked that the packages were efficient, performed health checks by looking at the wait stats and tuned the instances based on what we found.
Two days ago, we presented the solution to the business owners, with multiple sample reports generated by SSMS, Regular Pivot Tables and PowerPivot for Excel. We sliced and diced at the client level, server level and the results were coming back pretty fast. They were extremely happy as they just found a way to slice “everything by everything”. I even heard the statement ”This will be the company’s biggest asset”.
We will continue adding more facts in the next 3 months and be done with the bulk for this business unit. Then we will extend the current solution to include additional business units.
We will also finalize with the migration of the remaining objects, like Reports running on the old instance, remaining ODS tables, new replication deployments and of course the migration of a legacy SQL Server 2005 SSAS Cube.
We had a cube already? Yes, but we never called it BI, we called it just enhanced reporting. The Cube itself is fine but the problem is in the legacy ETL. That code will be wiped out and redeployed with best practices onto our SSIS instance.
All our solutions are running under SQL Server 2008 R2 RTM, Enterprise Edition.
Well, that’s it for now. I am lucky to be surrounded by a talented team that has allowed us to get to the next level. And this is just the beginning.