Shulou(Shulou.com)06/02 Report--

Ensuring the high availability of data in the data storage layer mainly includes two aspects: the high availability of hardware storage and data backup.

1. Hardware fault tolerance

In the case of high availability of hardware storage, you can SAN the solution, as shown below:

In the figure above, the company has many servers, all the data is stored in the enclosure, and the green area in the picture is the solution of SAN.

Fault tolerance of SAN is divided into two parts: network and disk.

Network: the network of the server and the enclosure uses a fully interconnected network, which ensures that any network equipment and network cable fail, and there is no impact on the server's access to the background data.

Disk: the disk in the enclosure does RAID to ensure that the data hardware is damaged and data is lost.

two。 Data backup

Although SAN can ensure the high availability of data at the hardware level, in enterprises, due to some reasons, such as insufficient disk space, human misdeletion and so on, it is not enough to ensure high availability of hardware, and it also requires IT personnel to back up the data stored in the background.

When planning the data backup of an enterprise, many people think of 4W. Here is a general introduction:

Who: who do you want to back up? This level is designed to two questions.

1. Find a responsible person in the enterprise to do such a thing.

2. Assign the corresponding operation rights to the user of the backup.

Where: where the backed-up data is stored. Mainly disks and tapes.

It is stored on the company's disk, so it is easy to operate. If you want to keep it for a long time, or if you want to save it more safely, back up to the tape, which can be stored in the company's safe or in the bank's safe.

When: when to make a backup. Refers to the company's backup strategy.

This depends on the actual situation of the company. If the company's data is very important, it is recommended to make a full backup every day; if the company's data base is large and the new data every day is not very large, it is recommended to do a complete backup on Monday, differential backup from Tuesday to Sunday, and so on.

What: how to make backups. Refers to what software the company uses to back up.

In Windows Server 2003 and previous versions, NTBackup was used in Windows Server 2008 (R2) and Windows Server Backup.

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