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This article mainly explains "what are the common faults of oracle database", interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let Xiaobian take you to learn "what are the common faults of oracle database"!

Oracle does not work after startup or the database does not start

Once the database cannot be started, it is necessary to check whether the system table is in an undamaged state. Generally speaking, if the system table is not damaged, it is easy to recover the data. If the system table has been damaged, it is necessary for the data recovery staff to manually analyze and verify the table structure. In this way, the cycle of data recovery is relatively long, but the success rate of data recovery is still high. There is no need to worry about data recovery failure.

Second, ASM storage of Oracle database is damaged

This failure scenario is usually due to partial device failure of ASM or loss of database data due to ASM reset etc. After this situation occurs, it is necessary to determine whether there is a large amount of data written after the failure. Usually, if there is no continuous writing of large amounts of data to the database, data recovery can be performed. Therefore, it is also important to note that once such a failure occurs in the oracle database, it is necessary to avoid writing data to the device as much as possible, so as not to destroy the original data.

Third, the database error deletion, error formatting and other data file loss

After the data in Oracle database is lost due to wrong formatting, wrong deletion and other wrong operations, remember not to write data to the database after wrong operation. If the data is not written after the data loss, regardless of any operating system we can complete the recovery of the database through the organization rules of the database, the only disadvantage is that the recovery person needs to manually check the data file name.

Fourth, Oracle data file partial corruption and dump file corruption

If the oracle data file is partially damaged, professional data recovery practitioners are required to extract and reorganize the data before recovery can be carried out, and the data recovery time is relatively long.

When an Oracle dump file is damaged, the damaged part is removed, and the rest can be appended to the data table normally.

Database data recovery recommendations

If the data loss is due to software reasons, it should be avoided as much as possible to do too much storage operation and mirror the data in time after the data loss. If the data loss is due to hardware failure, it is necessary to avoid power-up attempts on hardware devices, so as not to further damage the device and increase the difficulty of data recovery.

At this point, I believe that everyone has a deeper understanding of "what are the common faults of oracle database", so you may wish to actually operate it! Here is the website, more related content can enter the relevant channels for inquiry, pay attention to us, continue to learn!

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