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Plugable DC-125 USB 2.0 Laptop Docking Station and Multiseat Thin Client – VGA up to 1440×900 / 1280×1024, Audio, 2 USB ports $64.95 This multi-function USB dock enables an extra VGA graphics display, speakers/mic, and keyboard/mouse to be added to any PC via a USB cable up to 5 meters away (cable included). Connect one to use as a universal laptop docking station. Or connect many DC-125 units to a server with special software, to enable many users to share one machine (requires compatible multiseat OS software such as Windows … |
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Panasonic BB-HCM511A Network Camera with Two-Way Audio $329.95 Power over Ethernet (PoE) MPEG-4 Network Camera with Preset Modes, Progressive Scan, Analog Video Output and SD Card Recording with Audio…. |
Five Typical Mistakes For Constructing and Maintaining SQL Server Databases
The creation and maintenance of a SQL server database environment is no simple task. There are numerous parameters involving support, troubleshooting and design that need some consideration. Making mistakes in these areas or missing important details will makes these tasks much more difficult.
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Below is a list of five common mistakes when building and maintaining a SQL Server database environment. There are, of course, more, but tackling these will hopefully keep you on the right track.
1. No Backup Plan
By failing to backup your databases fairly often you are opening yourself up for big problems. Backup planning should involve regular backups, ability to gather and recover backed up data, and use of locations other than database server for storage purposes. Make a point to perform backups early and often. You don’t want to experience a situation where backup data isn’t available.
2. Using an Ad Hoc Query
Users should only be allowed to access the database through stored procedures on the application level. An Ad Hoc query enables users to write their very own code against the database with various different permissions. A procedure that is stored will only allow EXECUTE permissions which provides better performance through caching and compiling and also preserves the integrity of the data. Proper SQL optimization begins with removing most or all ad hoc queries.
3. Not Enough Testing
Putting code into production without testing is nearly as bad having a poor backup plan. Not providing for beta and on-going testing is also a mistake. An optimal pre-production test should be as similar as possible to the production environment. Smaller test databases don’t always scale well to fully functioning production environments. Testing now is always better than fixing later.
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4. Lack of Monitoring
You can’t expect to flick the switch and have your databases run perfectly without performance issues. Continued SQL optimization requires regular performance monitoring to ensure a quality end user experience. Not performing the proper monitoring opens you up to slowed performance due to applications and queries using up system resources. SQL server hardware environments and queries need to have constant monitoring and optimization to make certain that performance is as good as it can get. SQL monitors give DBAs a historical view of trend data to help them create a plan to tune the database and improve performance.
5. Insufficient Change Management Processes
Changing a stable production environment should not be done light-heartedly. It requires the appropriate testing, planning, and implementation processes. Having a change management process provides some structure for how changes are made. If database changes don't go according to plan, having the right documentation of how, why and when changes should be made will provide for quick reversions. Conducting the necessary pre-production testing needs to be a step in your change management procedure. One simple hint: document everything.