To reduce database contention independent of making disk configuration changes, try approaches that may reduce database access contention or improve file access time.
如果希望减少数据库争用，但是不愿意修改磁盘配置，那么应该尝试减少数据库访问争用或改进文件访问时间的措施。
When the results are appended, the new results are added to the end of the file, thus making the file longer each time the command is repeated.
当使用的是将内容附加到文件末尾，那么，每次执行上面的ls命令，新的结果就会被添加到文件末尾中，所以，每次使用ls命令，就会使文件的长度变长。
Every time you make a change to a file, you run the risk of accidentally making more mistakes.
每次你更改文件，你也冒着意外地增加更多的错误的风险。
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