Among this article, we will come to see if the small and medium enterprises to upgrade to a Vista, which benefits may be obtained, the corresponding cost is how much do what shortcomings, and plans to implement a Vista deployment should be considered when some of the factors . Just another pretty interface? About Vistas new user interface has been too many technical newsletter articles. It provides a transparent window borders, impressive animation, and other is called as "eye candy" enhancement of visual effects. Glass will not be able to run on all computers; it requires a compatible graphics card, and more system memory.
Non-archive mode is not saved in the log redo log mode of operation, this mode of operation can only be used to protect the log instance failure, but not for the protection of media failure. Non-archive mode works as follows: Assume that the database only two log groups, and the current log group, a log group, the log sequence number is 1. When the transaction log set to fill temporary changes, the system will switch to the log group II, and the LGWR process to write the changes in the transaction log set, the log sequence number to 2; changes when transaction log to fill Group II, the system also automatically Switch back to a log group, this time into a log sequence number 3, and 3 correspond to log sequence number changes will overwrite the transaction log sequence number 1 corresponding to the transaction change, and so on.