Tag：Snapshot
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Time：2021-3-2
Since SQL Server 2005 SP1, SQL has supported database mirroring. The purpose of its design is to provide SQL Server with a disaster recovery technology with real-time data synchronization, that is, it can provide redundant data backup, which is more convenient to switch. There can only be one mirror database per principal database. As a […]
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Time：2021-2-27
Click to view the secrets of Greenplum distributed database kernel (Part 1) 1. Distributed actuator Now that we have the distributed data storage mechanism, we have also generated the distributed query plan. The next step is how to execute the distributed plan in the cluster and finally return the result to the user. Related concepts […]
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Time：2021-2-23
In the data guard environment, the standby database can be opened in read-write mode by using the flashback feature of the database, which is used to perform some kind of test work on the primary database. After the test, the database can be flashed back to the previous state as a backup to continue to […]
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Time：2021-2-21
This article demonstrates how to experiment with cloud control to switch between snapshot database and physical backup database. 1 switch from physical backup database to snapshot database 1) Switch to physical backup library orcldg 2) Click Convert in the standby database column 3) Click to continue 4) To confirm the conversion of the database, click […]
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Time：2021-2-19
As the most basic and critical fault-tolerant mechanism of Flink, checkpoint snapshot mechanism ensures the data accuracy of Flink application after recovery from abnormal state. At the same time, checkpoint related metrics are also the most important indicators to diagnose the health status of Flink application. A successful and time-consuming checkpoint indicates that the job […]
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Time：2021-2-5
In the last blog, we talked about the configuration and description of redis’s include, network and general configuration sections. Please refer to:https://www.cnblogs.com/qiuhom-1874/p/13383166.htmlToday, we will continue to talk about the configuration and description of redis’s other configuration sections; Snapshot related configuration Save: this instruction is used to specify at least how many write operations occur in […]
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Time：2021-2-2
In the last blog, we learned about KVM infrastructure and deployment, as well as the process of installing virtual machine with virt manager, a graphics management tool. Please refer to https://www.cnblogs.com/qiuhom-1874/p/13499801.html Today, let’s talk about the command-line tool virsh of KVM. Virsh has rich functions, which can manage KVM in its whole life cycle, such […]
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Time：2021-2-1
ARTS Arts is an activity launched by Chen Hao in the geek time column. The purpose is to keep learning through sharing. Each person writes an arts every week: algorithm is an algorithm problem, review is to read an English article, technology / tips is to share a small technology, share is to share a […]
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Time：2021-1-30
In the last blog, we talked about the configuration of RDB persistence, secure connection and resource restriction of redis. For review, please refer to:https://www.cnblogs.com/qiuhom-1874/p/13394411.htmlToday, let’s talk about the configuration of redis master-slave replication, AOF persistence, cluster and slow log; Configuration related to replication slaveof : this instruction is used to specify the IP address and […]
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Time：2021-1-28
The following article comes from Jingdong retail technology, the author of the research and development platform Yao Qi What is Diablo mode? IOS 13 Apple has launched dark mode, which can better protect eyesight at night and save app power consumption. However, the dark mode provided by apple only supports IOS 13. In order to […]
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Time：2021-1-20
preface In the actual use of the database, we often encounter situations in which we do not want the data to be written or read at the same time. For example, in the second kill scenario, two requests read to the system at the same time, and there is one inventory in the system, and […]
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Time：2021-1-15
1. What is redis Redis is a “key value” in memory, non relational database, which belongs to NoSQL. Redis has a very fast reading and writing speed, which is especially suitable for frequent reading and writing scenarios. Redis supports master-slave replication and data persistence. 2. Do you know the common data types of redis String […]
