Data Centers and the Local Environment in .NET framework

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mean is the machine named flaky not working Yes, it s down right now. Six machines and a few system managers made this both fun and manageable, and there wasn t any large money riding on our ability to quickly identify a troublemaking machine. Hal
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Data centers and data center cabinets are valuable ways to maintain systems, but they are not perfect in all situations. Apply them with care. The time to take care of cabling issues is when the cables are installed, not when new problems arise. Label all of those cables! In system naming schemes, as in all areas, simplicity is the best approach. Remember that security and cooling are just as important to system availability as disk mirroring and clustering.
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CHAPTER
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Take away my people but leave my factories and soon grass will grow on the factory floors. Take away my factories and leave my people, and soon we will have a new and better factory. Andrew Carnegie Why do builders skip the 13th floor of buildings, but book publishers aren t afraid to include a 11 George Carlin
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It s been said that data is a business s most important asset. To say that is to overlook (and perhaps take for granted) a far more important business asset: the people. In 11, we look at two important areas of availability, people and processes. Like 10, Data Centers and the Local Environment, this comes under the heading of Local Environment, leaving us at the fifth level of the Availability Chart, as shown in Figure 11.1. You can implement all the processes that your business may need; processes that can make it a model of unmatched efficiency. But most of those processes require people to keep them going. It s people who will locate and fix bugs in software, it s people who will replace a failed board in a server, and it s people who will write the documentation that your systems need so that another generation of people can maintain them.
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11
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A V A I L A B I L I T Y
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Local Environment Networking Disk and Volume Management Reliable Backups Good System Administration Practices INVESTMENT
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Figure 11.1 Level 5 of the Availability Index.
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Wouldn t it be nice if you could roll out a system and that would be the end of it Imagine if you never had to revisit your systems for hardware, operating system, or application upgrades. As long as you re making wishes, how about a pony, too Life just isn t that simple. The first rule of system maintenance is that it will always be required. The trick is to perform the maintenance so that it has the least possible impact on overall system availability. The second part of that trick is to properly maintain your servers while still properly maintaining your personal life. Restricting all of your maintenance activities to Friday and Saturday nights after 8:00 P.M. doesn t leave a lot of time in life for much else. Of course, if your systems are used 24 hours a day, there may not be a noncritical time.
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At one job that I had, policy was that maintenance could only be performed on Friday nights. Work could only begin at 7:00 P.M., and then before any actual work could begin, a complete backup of the systems had to be taken. (These were development systems.) One particular Friday night, backups completed at around midnight, and then we got to work doing a major system upgrade. Some time around 4:00 A.M. (I had come into work that morning at 8:00 A.M., having no idea how late the night would go), I made a mistake in judgment that turned out to be fairly serious. Due to a problem with the backups, this mistake caused the developers to be idled for nearly two weeks while files were manually repaired and recovered. To this day, I blame my error (at least partially) on having been at work for 20 straight hours and having been alone for the last 8 of those hours. Evan
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