Tag：fault
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Time：2021-7-31
This article is transferred from @ TWT community, [author] Yang Jianxu. [Abstract] this paper introduces the storage high availability handoff test under business pressure, the problems affecting the handoff time found from it, and the analysis of the problems. In general, our stress test focuses on the throughput of the trading system, the response time […]
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Time：2021-7-27
In our daily database use, the monitoring system, as an important auxiliary system for troubleshooting and alarm faults, plays an important role in problem diagnosis, troubleshooting and analysis for DBA, operation and maintenance and business development students. And the quality of a monitoring system also greatly affects whether the fault can be accurately located and […]
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Time：2021-7-24
catalogue 1、 Basic concepts and architecture 1.1 basic concepts 1.2 architecture 2、 Deployment demo 2.1 deploy master-slave nodes 2.2 deploy sentry nodes 2.3 failover demonstration 3、 Client connection (configuration provider) 3.1 code 3.2 principle 4、 Implementation principle 4.1 three scheduled tasks 4.2 subjective offline and objective offline 4.3 leader sentinel node election 4.4 failover 1、 […]
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Time：2021-7-24
1. How to ensure high availability and high concurrency of redis Redis master-slave architecture, with one master and multiple slaves, can meet high availability and high concurrency. When an instance goes down, it automatically switches between active and standby, configures read-write separation, and relieves the read-write pressure on the master. 2. How to implement redis […]
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Time：2021-7-22
public static void main(String[] args) throws Exception { // Instantiate with a producer group name. DefaultMQProducer producer = new DefaultMQProducer(“GroupNameDemo”); // Specify name server addresses. producer.setNamesrvAddr(“localhost:9876”); //Launch the instance. producer.start(); for (int i = 0; i < 100; i++) { //Create a message instance, specifying topic, tag and message body. Message msg = new Message(“TopicDemo” […]
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Time：2021-7-19
Introduction: at present, kubenode has covered all ASI clusters of Alibaba group. Next, with the project of “unified resource pool” of Alibaba group, kubenode will cover a wider range and more scenarios, so as to make the cloud native container infrastructure operation and maintenance architecture play a greater value. Challenges of Alibaba’s node operation and […]
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Time：2021-7-7
background Microservice architecture refers to the vertical division of large complex systems into smaller subsystems according to functional or business requirements. These subsystems exist as independent deployed subprocesses, and they communicate with each other through lightweight, cross language synchronous (such as rest, grpc) or asynchronous (message) network calls. phenomenon stayMicroserviceAt the top of the […]
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Time：2021-7-2
<br/>Apache Kafka is a distributed message system written in Scala language. Basic concepts of kafak message Message is the most basic data unit in Kafka. It is composed of key and value. KV is a byte array. Kafka will route messages to the specified partition according to the key value according to certain policies, so […]
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Time：2021-7-2
Abstract:Flink fault tolerance mechanism mainly includes job execution fault tolerance and daemon fault tolerance. The former includes execution graph and execution fault tolerance of Flink runtime, while the latter includes job manager and task manager fault tolerance. This article is shared from Huawei cloud community《Flink fault tolerance mechanism》Author: Yang Xiao_ mrs 。 Flink fault tolerance […]
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Time：2021-6-21
Preparation for building redis cluster Before building a cluster, it is necessary to pay attention to election, because in today’s many distributed middleware, the cluster will have the concept of election. It must reach more than half of the nodes in order to initiate a fair vote. Otherwise, there will be brain cracks, such as […]
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Time：2021-6-17
preface In order to avoid single point of failure, we need to deploy multiple copies of data replication on multiple different servers. Even if one server fails, other servers can continue to provide services effect: Data backup Extended read performance(Read write separation) Copy mode： Full replication Partial replication Implementation mode 1One master and […]
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Time：2021-6-11
Author:zzssdd2 E-mail：[email protected] 1、 Preface in useCortex-MWhen the MCU of kernel is developing, sometimes the program will be abnormal because of the wrong access to the memory and other reasons, so it will enter the systemHardFaultHandlerError interrupt. If the program structure is complex, especially when running RTOS, it may not be easy to locate the cause […]
