ceph file system performance

/* (staring at the first draw)* Copyright Notice and version number of the program* Copyright (c) 2011, Yantai University Students ' School of computer Science* All rights reserved.* File name: Student Performance Management System* Author: Liujiangpo* Completed Date: June 23, 2012* Version number: v.623* Descriptive narrative of tasks and solutions* The gaze end

Oracle ORION: Storage System Performance Testing Tool (I) defines ORION (Oracle I/O Calibration Tool) as an Oracle Tool for testing storage system performance bottlenecks because ORION is an independent Tool, it is very easy for users to create and run Oracle Database ORION. You can simply decompress the downloaded pac

operation. After the delete, the job is extinct from the system and can no longer be acquired; the release operation re-migrates the job state back to ready (which can also delay the State migration operation) so that other consumer can continue to acquire and execute the job; Interestingly, Bury operation, You can hibernate the job, wait until needed, and then kick the dormant job back to the ready state, or delete the job with the buried status. It

MySQL obtains the system performance and status. #! /Bin/ksh INTERVAL = 5 PREFIX = $ INTERVAL-sec-status touch/tmp/running RUNFILE =/tmp/running my-e 'show global variables '> mysql-variables while test-e $ RUNFILE; do file = $ (date + % F _ % I) sleep = $ (date + % s. % N | awk "{print $ INTERVAL-(\$ 1% $ INTERVAL)}") sleep $ sleep ts = "$ (date +" TS % s. % N

I. Some concepts and understandings about Kafka Kafka is a distributed data flow platform that provides high-performance messaging system functionality based on a unique log file format. It can also be used for large data stream pipelines. Kafka maintains a directory-based message feed, called Topic. The project called the release of the message to topic was a

It is well known that computers produce various browsing history data in use, such as temporary Internet files, download history, cookies, and Web site data, and so on, which can affect the speed of the system. The Ghost Win7 local file browsing history quick removal technique is also described in the previous tutorial, but this is simply to delete the local file

Test disk IO speed with time+dd+ifWrite Speed:Time DD If=/dev/zero of=test.dbf bs=8k count=300000Where/dev/zero is a pseudo-device that produces only a stream of empty characters and does not produce IO for it, so the IO is concentrated in the of file, the of file is used only for writing, so this command is equivalent to the write capability of the test disk.The output is similar (because generally longer

Layout:postThe practice of title:2016-04-25-information System a case of 6-JS calling Flex performancekey:20160425Tags:gis JS FLEX Technology selection Performance API callmodify_date:2016-04-25---The practice of information system a case of 6-JS invoking Flex performanceDescription This article was posted in: Gitee,github, Blog Park Please specify t

Php file cache performance test. Common cache methods for PHP: first, process the data to be cached to form a file that can be directly executed by PHP. When you need to cache data, use the include method to introduce and Common PHP Cache methods: First, process the data to be cached to form a file that can be directly

milliseconds) per device I/O operation. Delta (use)/delta (RIO+WIO) %util: CPU usage time per second for IO operations. That is, the amount of time in a second for I/O operations, or how much time in a second I/O queue is non-empty, calculation method: (r/s+w/s) * (svctm/1000) %util indicates how busy the disk is. 100% indicates that the disk is busy and 0% indicates that the disk is idle. Note, however, that disk busy does not represent high disk (bandwidth) utilization Can only reflect

Tuning system performance using SAR in LinuxKeywords: SARThe SAR default is not installed under Linux, we need to install manually, it is generally recommended source mode installation, download similar sysstat-6.1.3.tar.gzYou can then use the Configure make make install.Common formats for the SAR command line:SAR [Options] [-A] [-o file] t [n]In the command line

. Assigning values to variables In contrast, it is possible that parsing an array in a PHP file takes more time than unserialize deserializing the array. If you are interested you can view the performance efficiency study of PHP filesystem related functions and include require: http://www.ccvita.com/163.html Test file Code: Download Address: Moophp-cachetest.z

last few lines of each test result. Pay special attention to the memory, which easily exceeds the memory configuration] Using login values from ~ /. My. cnf-Initial login attempt failed-Testing for stored webmin passwords:None FoundCocould not auto detect login info!Found potential sockets:/tmp/mysql. sockUsing:/tmp/mysql. sock # I believe you can understand the following items, but I will not explain them.Wocould you like to provide a different socket? : [Y/N] nDo you have your login handy? [Y

I. System performance analysis (Top command)The top command is a common performance analysis tool under Linux that shows the resource usage of each process in real time, and refreshes the list of processes by default for 5 seconds, so it is similar to the Task manager for Windows.650) this.width=650; "src=" Http://my.csdn.net/uploads/201207/10/1341935470_9855.jpg

Article Title: Linux operating system security performance check notes. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Linux security check notes 1. Accounts check # Less/etc/passwd # Grep: 0:/etc/passwd Note that the new u

Nmon (named for the Nigel Monitor) is a computer performance system monitoring tool developed by IBM employees Nigel Griffiths for AIX and Linux systems. Nmon can display the operating system statistics on the screen or stored in a data file to help understand the use of computer resources, adjust the direction and

The last section of the Linux system security performance check notes has not been understood yet. Note: 1. Accounts check # Less/etc/passwd# Grep: 0:/etc/passwd Note that new users, UID, and GID are 0. 2. Log Check Note "entered promiscuous mode" Note: Remote Procedure Call (rpc) programs with a log entry that includes des a large number (> 20) strange characters (-^ PM) The last one has not been und

(I) Definition Orion (Oracle I/O calibration tool) is a bottleneck provided by Oracle for testing storage system performance. As Orion is an independent tool, you do not need to create or run an Oracle database. Orion is very simple to use. You can directly decompress the downloaded package from the official website. Http://www.oracle.com/technetwork/cn/topics/index-088165-zhs.html Decompress: # Gunzip or

shared, and Drdb are replicated through the network between servers. Features: complex, with a brain fissure problem that can achieve 99.9 SLAMYSQL Cluster High-availability solution: MySQL cluster consists of a set of service nodes, each service node is running a variety of processes, including MYSQL server, NDB Cluster data node, Management Server, as well as dedicated data visit procedures, features, powerful, cumbersome configuration, Up to 99.999% SLAThis article from "High Good bright" bl

/keepalived/keepalived.conf" 40L, 1292C written [[emailprotected] ~]# vim/etc/keepalived/keepalived.co NF Auth_type PASS auth_pass 1111} virtual_ipaddress {172.16.1.99}} virtual_server 172.16.1.99 3306 {Delay_loo P 2 #lb_algo RR #LVS算法, we shut down the #lb_kind DR #LVS模式, if not shut down, the standby server cannot connect via VIP to master MySQL Persistence_ Timeout #同一IP的连接60秒内is assigned to the same real server protocol TCP real_server 172.16.1.101 3306 {#检测本地mysql, Backup also writes to det