Margaret Crevar has worked at SAS since May 1982. She has held a variety of positions since then, working in sales, marketing and now research and development. In her current role, Crevar manages the SAS Performance Lab in R&D. This lab has two roles: testing future SAS releases while they're still in development to make sure they're performing as expected; and helping SAS customers who are experiencing performance issues overcome their challenges.
What makes mainframes relevant today? Why are they still in use more than 50 years after their inception? Watch the video below and then come back to read about some specific use cases of SAS® technology in use on IBM mainframe computers. Mainframes have had many uses Throughout this half-century
Editor's note (4/11/17): Full proceedings from SAS Global Forum 2017 (including for the presentations mentioned in this blog) can be found at http://support.sas.com/resources/papers/proceedings17/. SAS Global Forum 2017 is just a month away and, if you’re a SAS administrator, it’s a great place to meet your peers, share your experiences and attend
In my current role I have the privilege of managing the Performance Lab in SAS R&D. Helping users work through performance challenges is a critical part of the Lab’s mission. This spring, my team has been actively testing new and enhanced storage arrays from EMC along with the Veritas clustered
I look forward to SAS Global Forum each year and this past conference ranked up that as one of the best I've ever attended. This year there were so many wonderful presentations, Super Demos and workshops on the topic of administration of SAS and the underlying hardware infrastructure needed for SAS
With memory being affordable now, we are constantly being asked by customers about doubling and tripling the amount of RAM that SAS recommends. More is better, right? Often, but we have found a specific scenario using SAS datasets where that is not the case. Remember, that increasing memory generally means a commensurate
From time to time we’ll hear from customers who are encountering performance issues. SAS has a sound methodology for resolving these issues and we are always here to keep your SAS system humming. However, many problems can be resolved with some simple suggestions. This blog will discuss different types of
SAS recently performed testing using the Intel Cloud Edition for Lustre* Software - Global Support (HVM) available on AWS marketplace to determine how well a standard workload mix using SAS Grid Manager performs on AWS. Our testing demonstrates that with the right design choices you can run demanding compute and
Editor's note (1/13/16): This post has been updated with full paper presentations from SAS Global Forum 2015. Enjoy! This year, the number of presentations, Super Demos and workshops to help with the administration of SAS software and its hardware infrastructure is growing at SAS Global Forum 2015. This is wonderful news to
SAS FULLSTIMER is a SAS system option that takes operating system information that is being collected by SAS process runs and writes that information to the SAS log. Using it can add up to 10 lines additional lines to your SAS log for each SAS step in your SAS log—so why
My Performance Validation team in SAS R&D is constantly working with our partners to test how their storage arrays work with SAS. In late 2014, we finalized several papers that discuss how a mixed analytics workload performs on several storage arrays. While doing this testing, we also listed lessons-learned in
With the growing use of SAS on commodity hardware, many organizations are running lots of SAS servers on separate instances of operating system in a SAS infrastructure. This configuration is great for optimizing resources, but when these SAS servers have to share data, then SAS recommends the use of a clustered
In trying to offer better support to SAS users, many customers’ IT departments are looking to consolidate all their SAS desktop users onto a centralized Windows, UNIX or Linux server. This option is a very practical strategy, but implementing it satisfactorily requires a lot of assessment on how the SAS
For those of you who have followed my SAS Administration blogs, you will know that setting up your IO subsystem (the entire infrastructure from the network/fibre channels in your physical server, across your connections, to the fibre adapters into the storage array, and finally to the physical disk drives in
When SAS is used for analysis on large volumes of data (in the gigabytes), SAS reads and writes the data using large block sequential IO. To gain the optimal performance from the hardware when doing these IOs, we strongly suggest that you review the information below to ensure that the
In a comment on last week’s blog asking SAS administrators: please submit your paper idea for SAS Global Forum 2015, Andrew Howell of ANJ Solutions asked if I had any statistics on which were the most popular SAS administrator papers for last year’s conference. He suggested the following nominations although
The SAS Global Forum 2015 Call for Papers opened the end of last month! I cannot believe it is time to start getting ready for the conference that will be in Dallas, TX on April 26-29, 2015. As part of the group from SAS who goes to the conference each
This blog is a continuation of an earlier blog entitled “To grid or not to grid?” In that blog, one of the reasons to say “yes to SAS Grid” is to see if you can gain some performance improvements from modifying your existing SAS processes by converting them to a
Let’s be honest. When well planned, a SAS Grid Computing platform as the basis for a shared, highly available, high-performance analytics environment can pay for itself many times over. However, it is critical that your overall objectives and computing environment be well understood for you to achieve success with your
SAS administrators often ask for a utility that can detect orphaned SAS WORK and SAS Utility directories on their back-end SAS compute systems. These orphaned directories result when a SAS Enterprise Guide or any other SAS GUI application is terminated incorrectly, and the SAS session does not terminate properly. SAS
It was wonderful to see and talk with so many SAS Administrators at SAS Global Forum this year. If you’re like me, you may have finished the conference wondering why it wasn’t possible to be two places at once because there was so much terrific content that it was impossible
SAS is constantly evaluating new technologies for internal and customer experiences. Based on requests from many of our customers, SAS R&D engaged with Fusion-io® to do performance testing with Fusion-io® ION™ Accelerator and ioScale™ storage devices. Our testing goals for the testing included:
Here in the SAS Performance Lab, we’re seeing more and more SAS sites moving their SAS® 9 application workloads to Windows Server 2012. Now that we’ve had sufficient time to gather feedback from early implementers of SAS on these systems, we thought you might want a recap of some of
Starting with SAS 9.4, not only will SAS administrators see lots of processes running on your operating system supporting the various SAS servers (such as SAS Metadata server), you will also see two new processes that have a description of “agent” running. Agents are software processes responsible for tasks such
This is a continuing topic of the SAS Administration and Performance blog series. In the last edition, I discussed why you need to do a technical assessment prior to planning your SAS deployment. Yes, this step takes time, but you’ll find it far easier to implement the suggested tuning guidelines
"Do I really need a detailed technical architecture before I start my SAS Deployment?" My team gets asked these questions all the time: Do we really need to spend the time for the above exercise? Why can’t we just start doing the deployment of SAS and fix issues if they come
With the popularity of SAS Grid Manager, this question often comes up: which clustered or shared file system should we use with the multiple nodes of the SAS Grid? This is a question that needs to be thought through very carefully because the amount of time and effort to fix
Users often ask if there are any major tuning efforts that need to be made in order for SAS to execute ideally in a virtual environment. The quick answer is "not really". The longer answer is “it helps to set up your virtual environment properly.” There are a few minor
This question comes up often when we’re working with SAS customers to configure their underlying storage arrays: “When is solid-state storage appropriate for SAS applications?” Solid-state drives, or SSDs, are the latest and greatest thing in storage today because they boast extremely fast performance. In this post, I’ll outline how
SAS software benefits from the high performance of solid state drives (SSD), whether it is in the form of flash memory cards or hard-drive form-factor SSDs. The following general points should be considered when planning SSD storage for SAS usage:
One of the roles my team enjoys is working with SAS customers on performance issues along with testing SAS software on selected hardware configurations. We also work closely with other groups within SAS who work with SAS partners to test the latest and greatest features. My team then takes what
