The two modules to be introduced today are assert and VM. Next we will introduce them separately.
Use assert for testing
Node, we can use the assert module to test the code. Equal () and notequal () are used to determine equality and inequality respectively. The first parameter is the expected value, the second parameter is the real value, and the third parameter is the exception information. The example is as follows:
var assert = require('assert')
Author: skate
Time: 2012/02/22
Manually release Linux memory --/proc/sys/Vm/drop_cache
Repost an article
Linux memory View:
[Root @ localhost 0.1.0] # Free-mTotal used free shared buffers cachedMem: 4032 694 3337 0 0 25
It should be noted that the used of mem is free + buffers + cached. In some cases, cached occupies a lot of resources and the value is incorrect. In fact, it does not affect actual use, the subsequent sections describe how to clear
Days ago,OracleThe company announced thatOracle DatabaseThe 11g version 2 and Oracle Real Application cluster launched the New Oracle VM Templates to help users quickly deploy high-availability virtualized databases. The new Oracle VM Templates released by Oracle Database 11g version 2 and Oracle Real Application cluster will be liked by everyone. This is what Oracle launched can help users better and faste
I replied to a post last night. The content is classic. So I 'd like to open a post for you to study!
It mainly includes two System Performance Parameters in the machine:
1. Debug. SF. hW = 0 and change to debug. SF. hW = 1. This step enables hardware acceleration.
2. Modify Dalvik. VM. heapsize = 24 m to Dalvik. VM. heapsize = 32 m. In this step, set the Virtual Machine size to 32 m.
Note that this is to
=" wkiom1xoe_7tcjpxaaffpuqbmuw152.jpg "/> More out of one, named, Virtual machine private network, used to bridge with VM and local networkGOne: (1) Open vm--> Edit--Virtual network editor--First, the original was completely deleted,Open and Change settings-add Network650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/72/9B/wKiom1XoFyyw6sREAAEoptOyHeU945.jpg "title=" QQ picture 20150903174713.png "a
Tags: centos virtualbox nat Nic Link-flapThese days, when running CentOS on the VM box, there is a sudden abnormal regular network card, normal use of 1, 2 minutes and turn off the reset and normal repetition of the phenomenon,Looking at this phenomenon, recall several actions that may be relevant before a phenomenon occurs:1 Upgrading the CentOS kernel with Yum Update: tested and kernel-independent2 suspected of large volume of communication data ins
Edit a VBScript file:
On
Error
Resume
Next
Set
Virtualserver
=
Createobject
(
"
Virtualserver. Application
"
)
Set
Vmcollection
=
Virtualserver. virtualmachines
For
Each
VM in vmcollectionWscript. Echo
"
====================================
"
Wscript. Echo
"
Name:
"
VM. NameWscript. Echo
"
Notes:
"
Fault Description: The VM is grayed out in the Vcenter list, the data store is opened in the Vcenter interface, "Add to Manifest" is grayed out, and the ESXi host where the VM resides is displayed as "Unknown" statusProcessing process:1. Use SSH to connect to the ESXi host where the VM is currently located;2. Use the following command to confirm which ESXi host t
How does one solve the sanlock error reported when the oVirt VM is started ?, Ovirtsanlock
Symptom:
The VM has been in use for a period of time. The VM is shut down and an error occurs after it is started;
Background log:
Thread-570342: ERROR: 15:31:17, 944: vm: 761: virt. vm
gns3-1.4 plus Vm-iou installation configuration tutorial http://down.51cto.com/data/2151906Zhao Ming, CC Lee1, the meaning of the tutorial for network engineers, knocking the lab is a way of daily entertainment. 工欲善其事 its prerequisite, GNS3 and IOU, VMS I will not introduce, the previous version of GNS3 for the experimental simulation of the switch is insufficient, such as MST can not be configured, although IOU to solve the problem, but IOU itself po
Analysis of startup process of Dalvik VM
The startup of the Dalvik virtual machine starts from another famous Android module, zygote.
We know that in the Android system, every Java application is designed to run in a separate Linux Process. Each process contains a running Dalvik Virtual Machine instance to execute Java bytecode in the application. Many Java basic classes (such as Java. Lang. *) and some system-level shared resources (drawable/color..
Swapniess and overcommit and other hadoop optimization, vm. overcommitmemoryThe size of the generated file, in KB.
Ulimit-f 1Dd if =/dev/zero of1_1g.txt bs = 1023 count = 1 OKDd if =/dev/zero of1_1g.txt bs = 1024 count = 1 OKDd if =/dev/zero of1_1g.txt bs = 1025 count = 1 Not AllowedUlimit-f ulimitLimits the cpu usage time
Ulimit-t 1
Echo 'LS-aRl/'> 1.sh bash 1.sh the program is automatically killed after it is run for a while.Explanation of firefoxb
Document directory
26.5.1 vectored-event Injection
Chapter 25 vmx NON-ROOT operation25.3 changes to instruction behavior in vmx NON-ROOT operation
• Mov from cr3. if the "enable EPT" VM-execution control is 1 and an execution of mov from 32a does notCause a VM exit (see section 25.1.3), the value loaded from 32a is a guest-physical address; see section28.2.1.
• Mov to cr3. if the "enable EPT"
VMware command line control VM
I haven't used the vmwarevm for a long time. Today I want to install an XP instance for testing. It's too slow to install it with virtualpc. If I don't wait for a long time, I will install it with Vmware, which is much faster than virtualpc.
After the installation is complete, it is important to enable the host operating system to automatically start the specified virtual machine for running. The keyword is a command l
Vmware copies a VM (vmwarecopy/clonevm)
Today, my colleague asked me how to copy a VM that has been configured. I have studied it. In fact, this function is quite useful. The main method is as follows:1. Select create VM2. This step is very important. select Custom (use other devices or specific configuration options to create virtual machines)3. Give the VM a l
=3061726064## JRE version: (8.0_45-B14) (build)# Java Vm:java HotSpot (TM) Server VM (25.45-b02 mixed mode linux-x86)# Failed to write core dump. Core dumps has been disabled. To enable core dumping, try "ulimit-c unlimited" before starting Java again#Shut down a tomcat to request 1G of memory, then the server left 200M of memory, so out of a memory. View shutdown.sh , and found that it was actually called catalina.sh , just passed in a stop number of
Link Address: http://jingyan.baidu.com/article/8275fc86b95c6246a03cf629.htmlVMware is currently the most used virtual machine. When the full-screen mode of the virtual machine is turned on, the VM defaults to a toolbar at the top of the screen to facilitate our operation. But sometimes, we might want to be able to remove the toolbars that hover over the top of the screen when using VM VMs to completely simu
In Linux learning, the need to build a Linux system environment, and the use of VMS is a good choice, VM full name VMware worksta use tion aspects, high degree of simulation, the following describes how to use the VM to create a virtual machine.1. Open the Software650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/4C/7A/wKioL1Q-KHKhBhnBAABy5zX8n14949.jpg "title=" 1.png " alt= "Wkiol1q-khkhbhnbaaby5z
Eclipse's configuration file Eclipse.ini can not only set the size of the stack memory for Eclipse, but also set the JDK version that is used by default. First, the existing Eclipse default boot JDK version is jdk1.5, need to change to 1.6 steps as follows:Method 1:Open the Eclipse.ini file, in front of the-vmargs parameter, must be preceded by, add the following code:-vm/home/david/scfjava/jdk1.6.0_02/bin/javaw.exeNote: In two lines, the format is im
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