Voice of the DBA

Author: way0utwest

  • sp_Blitz, v16, on SQLServerCentral

    Brent Ozar Unlimited released v16 of this sp_blitz script, which is designed to run on a SQL Server instance and give you a quick, comprehensive report of the state of the instnace. It’s a great script, and if you have the chance to see Brent present on the script, go see it. It’s a great show and a good explanation of why you might want this type of script.

    I haven’t had to manage the SQLServerCentral instances, but I decided to run this and see what jumped out at me. I started a series at SQLServerCentral where you can follow along with my results. The first article went up today.

    • Security
    • Reliability
    • Performance
    • Query Plans
    • Backup
    • Global Trace Flag
    • High Availability
    • Informational
    • Non-Default Server Config

    You should think about auditing your servers periodically with something like the sp_Blitz script, which will allow you to ensure your servers are running at peak performance.

    Administering your instances is an ongoing job. It’s not a time intensive daily job, but it’s something you should be doing periodically on all your instances, with monitoring setup on your servers to let you know when things might be causing problems.

  • Is Big Data Good for Data Professionals?

    Big Data isn't well defined, but it makes a lot of people sit up and pay attention.
    Big Data isn’t well defined, but it makes a lot of people sit up and pay attention.

    There’s a lot of hype around “big data”, a term being thrown around so much in the media that I’m not really sure what it means anymore. Is 1TB “big data”? Is 10,000 transactions/sec big data? Or does it mean that you have more data than your systems can handle, causing queries and reports to run slow?

    I almost hope it’s the latter. I hope that our managers start to think that when our systems run slower that we’re dealing with big data, and we need more resources. The whole big data phenomenon could be a way for data professionals to start a new hardware renaissance, where hardware budgets grow and we begin to replace our current systems with bigger, faster servers.

    Or perhaps it’s a way to offload some of the system administration for individual servers and move to cloud services. I don’t think that’s necessarily a bad move for many DBAs as it would allow them to focus on data management, and information extraction rather than dealing with storage and hardware management.

    Big Data is in the news, and it’s being used by vendors to sell new products and services. From Hadoop to new SANs to BI interfaces, there’s no shortage of places where the term “Big Data” might be used to try and shorten the sales cycle. As a data professional, it’s important that you understand what your needs really are, and if the term is being in a way that actually provides some value to your company for the money spent.

    Steve Jones

    The Voice of the DBA Podcasts

    We publish three versions of the podcast each day for you to enjoy.

  • A Learning Experiment

    I’ve been looking for ways to improve the way I do my job, which is mostly writing and editing, but at a higher level it’s teaching people. That was the goal of SQLServerCentral, to help people learn about SQL Server and become better at their jobs.

    Last summer I was looking at a few of the other online learning techniques, and decided to give one a try. I signed up for a Single Variable Calculus class at Coursera. It was delivered by Professor Ghrist from the University of Pennsylvania. There were some problems getting started, and the course was delayed from August until January. I had forgotten about this during the busy fall, but the first week of January I received an email that the class would start on Jan 7, and sure enough, I got a welcome email with a note to start.

    The class is set up as you might expect for a college class. I received a syllabus, some introductory remarks (8 minutes, about what I’d get in class), grading instructions, and an initial exam to see how prepared I am. I’ll be starting this week, setting aside a little time a few nights a week to work through this.

    I thought this would be a good class to understand the delivery mechanisms and structures as I have had 7 or 8 semester of calculus, though that was over 20 years ago. I’m hoping this won’t take too much time, but it will give me a chance to review some skills I’ll need to help my son in a few years, and it should be fun. I like math.

    I’m also looking for ideas that might help me build some better features for my regular job.

  • Statistical Protection

    Statistics are being used more and more, and many of us don't understand the lack of security, even in anonymized data.
    Statistics are being used more and more, and many of us don’t understand the lack of security, even in anonymized data.

    The things people can do with data is amazing. I remember reading about the anonymous data set released by Netflix and how some of the people were identified based on other, related actions on the Internet. This de-anonymization, while scary, was amazing to me. There have been other, related reports of similar “attacks” taken against other data sets. These reports worry me that we will have more and more data security issues in the future, not less.

    I ran across an article that talked about protecting data in statistical databases. These are the databases that contain data from multiple sources, and are used to analyze the information from these sources. The security of these databases becomes important when the data contains information about individuals that we consider sensitive. Interestingly enough, it seems that the security protections being used are query restrictions.

    However these restrictions are the reverse of what we might expect. There might be minimum restrictions on the number of rows returned, to try and prevent information about a specific individual from being returned. There are also limitations on the types of queries that can be run, usually requiring aggregate functions in the query, and restricting which aggregates are allowed.

    This is definitely an area of our industry that needs more work and research. Lots of organizations, especially government organizations are being called on to open their databases up to the public, and many of them are doing so right now, allowing queries of their statistical databases. This might improve the use of this information by the public, but there are plenty of ways in which this data could be potentially misused. If your companies wants to open some of your data to clients or customers, you might raise the concerns with possible abuses of the database and ask that time and effort be included to try and secure the data, possibly by implementing query restrictions.

    Steve Jones

    The Voice of the DBA Podcasts

    We publish three versions of the podcast each day for you to enjoy.