Programmer Think

Last December, as Log4J exposed high-risk vulnerabilities, it was not good news for java developers, especially for Ops. The former must repackage their applications with a fixed version of Log4J, while the latter must be redeployed. But for the program log, it is not just. Today, let's take a look at the log mechanism of the java systemIn shor ...

For cluster configuration, see: WSO2 ESB 5.0.0 cluster configuration 1, Cluster database Each Carbon based product uses a database to store user management details and registry data. All nodes in the cluster must use a central database for configuration and governance registry mount. H2 is not recommended for production.It is not recomme ...

1, Bin log backup function The operation log of mysql binary database is the safe log of transaction. 2, Open bin log Set the profile my inf Add the following content to the configuration file log-bin=/var/lib/mysql/mysql-bin //Open and set the backup file directory and backup naming format server-id=1 //The unique id of the database server ...

catalogue Network connectivity detectionCheck socket connectionNetwork usage detectionNetwork packet capturetransfer filesConnection idle timesummary Network connectivity detection In case of network abnormality in the application, the first thing to confirm is whether the network connectivity is normal. The following group of commands can ...

Hello, I'm architecture Jun, an architect who can write code and recite poetry. Today, let's talk about ProxySQL(10) of MySQL middleware: the "suggestions collection" of the read-write separation methodology. I hope it can help you make progress!!!return ProxySQL series: http://www.cnblogs.com/f-ck-need-u/p/7586194.html1. Different ty ...

This article comes from the special training column of algorithm interview questions. There are a large number of professional algorithm questions here, such as 21 days of dynamic planning, 28 days of special training in large factories, etc Welcome to study together. Link: Portal Reading guide Fat friends, in order to better help n ...

Spark operation Kudu creates a table Spark and KUDU integration support: DDL operation (create / delete)Local Kudu RDDNative Kudu data source for DataFrame integrationRead data from kuduInsert / update / upsert / delete from KuduPredicate push downSchema mapping between Kudu and Spark SQLSo far, we have heard of several contexts, such as Sp ...

If you are Xiaobai, this set of information can help you become a big bull. If you have rich development experience, this set of information can help you break through the bottleneck 2022web full set of video tutorial front-end architecture H5 vue node applet Video + data + code + interview questions. Look at the effect first (the source cod ...

If you are Xiaobai, this set of information can help you become a big bull. If you have rich development experience, this set of information can help you break through the bottleneck 2022web full set of video tutorial front-end architecture H5 vue node applet Video + data + code + interview questions. Contents of this article order ...

preface This article first summarizes the use of dynamic memory in classes, and then records the returned objects. Class and dynamic memory summary If new is used in the constructor to allocate dynamic memory, delete must be used in the destructor to free dynamic memory.There is only one destructor. Therefore, when there are multiple con ...