The Preview Task of Lesson 0416 + Classroom Notes

10.12 firewalld and netfilter selinux temporarily closed [root@arslinux-01 ~]# setenforce 0 [root@arslinux-01 ~]# getenforce Permissive selinux permanently closed [root@arslinux-01 ~]# vi /etc/selinux/config permissive doesn't block, it reminds, it doesn't show, it just records information. · CentOS 7 used netfilter firewalls before ...

Posted by neoboffins on Sat, 11 May 2019 01:04:12 -0700

We build wheels together - RxDownload

A download tool based on RxJava to support multi-threading and breakpoint continuation Project address RxDownload Main functions: Use Retrofit+OKHTTP for network requests Build on RxJava to support chain invocation of various RxJava operators Continuous transmission of breakpoints, according to the response value of the server to ...

Posted by Roble on Fri, 10 May 2019 22:05:29 -0700

ES Learning Record 4 - Filtration and Aggregation in ES

6. filtration The hits._score and max_score parameters in the search results were ignored before. In fact, they all refer to the relative measure of the matching degree between the document and the specified search query. The higher the score, the higher the matching degree. However, queries do not always need to generate scor ...

Posted by elflacodepr on Fri, 10 May 2019 15:06:48 -0700

Parallel Patterns and Algorithms (2)

1. Matrix algorithm In matrix multiplication, the number of columns of the first matrix and the number of rows of the second matrix must be the same. If parallel computing is needed, a simple strategy is to divide A matrix horizontally, get sub-matrices A 1 and A 2, B matrix vertically, and get sub-matrices B 1 and B 2. At thi ...

Posted by ohaus on Fri, 10 May 2019 14:27:01 -0700

onvif Learning Notes 10: Get RTSP Stream Address

Some netizens bought mine ONVIF Video Course I asked a few questions, one of which is to realize the function of ONVIF server to get RTSP address. This paper sorted out a train of thought, hoping to help you on the way of learning ONVIF. The video I recorded was very early, and I never took time to record another live video, so ...

Posted by DemonMaestro on Fri, 10 May 2019 14:12:04 -0700

Android Studio: Service of Four Components

1. Services are basically divided into two forms: start-up When an application component (such as Activity) starts a service by calling startService(), the service is in the "startup" state. Once started, the service can run indefinitely in the background, even if the component that started the service has been dest ...

Posted by creativodev on Fri, 10 May 2019 12:00:21 -0700

combiner Learning and Customized combiner of Hadoop

Combiner concept Combiner is known as the local Reduce, and Reduce's input is the final output of Combiner. In MapReduce, when the data generated by map is too large, bandwidth becomes a bottleneck. How to compress the data transmitted to Reduce without affecting the final results? One way is to use Combiner, which is known ...

Posted by frobak on Fri, 10 May 2019 11:06:38 -0700

Applet Standard Authorized Logon Process

Applets have been officially adapting API s since they came online, so a batch of obsolete interfaces have emerged. As programmers, we must not be confused by the constant changes at this time. We should keep up with the times and update our knowledge reserves and application skills.   New versus old: Old method: The old m ...

Posted by koray on Fri, 10 May 2019 07:52:15 -0700

On-demand loading of spa based on vue and react

On-demand loading of spa based on vue and react Since we are planning to use the same login method for all the management systems recently, and then switch the system after login, we don't need every system to re-login once, so the front-end side is thinking about building all the systems with a set of spa applications, but after t ...

Posted by MDanz on Fri, 10 May 2019 05:18:41 -0700

TeamTalk deployment details (skipping pits)

I. Deployment environment System: centos7 X64 bit (32 bit unsupported) core version II. Deployment process The download address of the project is https://github.com/mogujie/TeamTalk.git, which is a version of the project three years ago. Some of the scripts have 404 addresses, which is the source part of mariadb, and need to ...

Posted by pahikua on Fri, 10 May 2019 03:38:39 -0700