FIO performance test data drawing

A picture is worth a thousand words. This is especially true when testing performance. For the results of fio tests we often use, how can we quickly generate charts? Ensure that the FIO command can record performance data Refer to the following command: fio -filename=/dev/nvme2n1 -thread -numjobs=1 -iodepth=64 --bs=4K -direct=1 --rw=write -ioe ...

Posted by egg82 on Tue, 21 Jan 2020 09:58:20 -0800

Operation and maintenance | Elastic Stack ELK installation and deployment

Preface ELK is the abbreviation of three kinds of software, which are composed of Elasticsearch, Logstash and Kibana. In the process of development, there are new members, Beats, which form Elastic Stack. So, ELK is the old name, and Elastic Stack is the new name. The entire Elastic Stack technology ...

Posted by deezerd on Tue, 21 Jan 2020 08:57:35 -0800

KVM Management Tool WebVirtMgr

WEB Management Tool WebVirtMgr WebVirtMgr is a libvirt-based Web interface for managing virtual machines.It allows you to create and configure new domains and adjust the resource allocation for domains.The VNC viewer provides a complete graphical console for the guest domain.KVM is currently the only supported hypervisor for virtual machines. ...

Posted by tomato on Mon, 20 Jan 2020 19:45:51 -0800

4.5 billion data migration records follow-up-to-day data volume levels of 10 million to clickhouse

4.5 billion data migration records follow-up-to-day data volume levels of 10 million to clickhouse Related Document Address flume Reference Address waterdrop Reference Address clickhouse Reference Address kafka Reference Address The environment log is on one server and the clickhouse cluster is on the other. thinking Previously, when m ...

Posted by gszauer on Mon, 20 Jan 2020 18:52:36 -0800

How a case deploys a python project to a linux server

[External chain picture transfer failed, source station may have anti-theft chain mechanism, it is recommended to save the picture and upload it directly (img-6ljXK6PO-1579487161655). (]) 1. Case Background Write a script with Python and deploy it to a server in Linux environment. Since the server li ...

Posted by MadnessRed on Sun, 19 Jan 2020 18:37:50 -0800

Laravel + laravel admin build website background

  Local environment: laravel version: Laravel admin version: Laravel admin excellent expansion pack!!   1, Install configuration laravel 6.11.0 1. installation composer create-project --prefer-dist laravel/laravel blog 2. changing the time zone 'timezone' => 'PRC' 3. change the l ...

Posted by Trojan on Sun, 19 Jan 2020 02:56:59 -0800

Discussion on cache, buffer and swap caused by free

Discussion on cache, buffer and swap caused by free $ free total used free shared buffers cached Mem: 8062624 7910056 152568 0 5232 964468 -/+ buffers/cache: 6940356 1122268 Swap: 4194296 2592660 1601636 total: the ...

Posted by abx_2112 on Sun, 19 Jan 2020 00:40:57 -0800

centos7 mounts the new hard disk and modifies the storage path of mariadb

Environment CentOS7.4 mariadb 5.5 In principle, all mariadb installed from yum can be used Because the paths of / var/lib/mysql and / etc/my.cnf are the same The reason for this operation is that zabbix's history problem log has filled the disk, so you can only add a new hard disk and change the mysql storage path ------------------------- ...

Posted by br on Fri, 17 Jan 2020 23:53:23 -0800

sed stream editor: a powerful tool of Shell script

One of the core ideas of Linux is that everything is a file. Among these files, the text file plays an important role. All the changes of system settings, the adjustment of software parameters, and the most basic command-line operation are the operation of "text". To manipulate text, you can't ...

Posted by DeGauss on Fri, 17 Jan 2020 21:15:47 -0800

Discussion and recommendation on redis's security free configuration in docker compose

In an interesting discussion, let's take a look at the docker compose configuration script: version: '2' services: redis: image: 'redis:5.0.3-stretch' restart: always command: redis-server --requirepass redis environment: # ALLOW_EMPTY_PASSWORD is recommended only for development. - ALLOW_EMPTY_PASSWORD=yes ...

Posted by jassikundi on Thu, 16 Jan 2020 19:23:52 -0800