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1. Concepts 1. crmsh This project is not part of the GNU Project. Pacemaker command line interface for management and configuration Crmsh is a command line interface for managing pacemaker, not GNU. The latest version v1.2.6 RC 3 was released on November 29 ,. Crmsh supports Automatic completion 2. pcs PCS-Pacemaker/Corosync configuration system Dedicated to setting tools for pacemaker + corosync, including CLI and web-based GUI 2. Command comparison Show cluster settings crmsh # crm configure

agent to configure the Stonith device.1. Confirm that the current cluster status is normal (see here for information on how to install the "class" SQL Server cluster feature on RHEL):sudo supcs status2. Confirm that all nodes have Fence_vmware_soap installed:PCs Stonith List | grep fence_vmware_soap3. View the relevant configuration parameters for the Fence_vmware_soap:PCs Stonith describe Fence_vmware_soap4. Verify that the current machine can obtain a list of machines on VMware via FENCE_VMWA

Crm resource score OverviewIn the Heartbeat of V2, to combine resource monitoring and switching, multi-node clusters are also supported, heartbeat provides an integration policy to control the switching policies between nodes of each resource in the cluster. This point mechanism is used to calculate the total score of each node. The highest score is used to manage a (or a group) Resource in the active state.If no configuration is made in the configuration file of

agent to configure the Stonith device.1. Confirm that the current cluster status is normal:Supcs status2. Confirm that all nodes have Fence_vmware_soap installed:grep Fence_vmware_soap3. View the relevant configuration parameters for the Fence_vmware_soap:PCs Stonith describe Fence_vmware_soap4. Verify that the current machine can obtain a list of machines on VMware via FENCE_VMWARE_SOAP:Fence_vmware_soap--ip "L T Your username>" --password=""grep RedHatNote:IP is the IP or hostname of VMware E

, it is the time that the master database starts up.Floating IP Resource name--The name of the virtual IP resource,IP address--is used to connect the IP address of the SQL cluster instance.File System Resource name--the name of the filesystem resource,Device--nfs shared Path,directory--Local Mount Path,fstype--file share types, such as NFS.The script is as follows: sudo PCs cluster CIB cfg sudo pcs-f cfg resource create **sudo pcs-f cfg resource

English Original: https://www.paypal-engineering.com/2014/12/10/10-myths-of-enterprise-python/ Translated Original: Http://www.oschina.net/translate/10-myths-of-enterprise-python?p=3#comments Language diversification is an important part of the PayPal programming culture. While C + + and Java have been popular for a long time, more teams have chosen Jvascript and Scala. At the same time, Braintree's acquisition has introduced a sophisticated ruby community.Python, as a special language, has a l

giant Google to win the tiny Chinese Baidu, will be a logical thing. A year later, in June, Mr. Schmidt's secret Beijing, in Li's office, noted that Robin Li's so-called "cooperation with Google" was only "tactic" – luring Google to postpone a massive expansion of the Chinese market under the mihunzhen of "cooperation". On the August 5, 2005, Baidu came in and went straight to Nasdaq when Schmidt finally found out he had miscalculated. Worse, he found it too late, in the next two years, Baidu c

By default, heartbeat cannot monitor resources. that is to say, if a resource crashes, no action will occur. it will only take action when it deems the other machine dead, that is, crashed, network disconnection, and so on. This obviously cannot achieve our goal. To... By default, heartbeat cannot monitor resources. that is to say, if a resource crashes, no action will occur. it will only take action when it deems the other machine dead, that is, crashed, network disconnection, and so on. This o

Crm resource score overview in Heartbeat of V2, in order to combine resource monitoring and switching, multi-node clusters are also supported, heartbeat provides an integration policy to control the switching policies between nodes of each resource in the cluster. This integration mechanism is used to calculate the total score of each node ,... Crm resource score overviewIn the Heartbeat of V2, to combine resource monitoring and switching, multi-node clusters are also supported, heartbeat provid

. Each node contains an information layer. 2). crm:cluster Resource messager, a component called a resource manager, is primarily used to provide high availability for those services that are not highly available. It needs to work with the messaging layer, so it works on the messaging layer layer. The main work of the resource manager is to determine the start, stop, and resource transfer, resource definition, and resource allocation of a service based on the health information passed by the mes

: [2223]: info:do_started:Delaying start, CCM (0000000000100000) not connectedJune 16:00:30 SNN CRMD: [2223]: info:crmd_init:Starting Crmd ' s MainloopJune 16:00:30 SNN CRMD: [2223]: Notice:crmd_client_status_callback:Status update:client SNN.ABC.COM/CRMD now have stat US [Online]June 16:00:30 SNN CRMD: [2223]: Notice:crmd_client_status_callback:Status update:client SNN.ABC.COM/CRMD now have stat US [Online]June 16:00:30 SNN CRMD: [2223]: notice:crmd_client_status_callback:Status update:client D

(m_hwndcancel );If (hwndfocused = m_hwndcancel) setfocus (m_hwndedit );} }Translatemessage ( MSG );Dispatchmessage ( MSG );} Return ret;} Code example for calling VC ++ 6 --------------------------------------------------------Cinputbox ibox (this-> m_hwnd );If (ibox. domodal ("Hi, it's me", "if u know what I mean! "))MessageBox (null, ibox. Text, "aaaaaa", mb_ OK ); Wxdev-C ++ call code example ---------------------------------------------------// Insert your code hereCinputbox

component is:(1), HeartbeatHeartbeat has three versions of Heartbeat V1, Heartbeat v2 and Heartbeat v3Heartbeat V1 is the older version, Heartbeat v2 is the current stable version, which is used when doing experiments.(2), Corosync(Openais sub-project)(3), keepalive(4), CmanHeartbeat is a more commonly used software, keepalived configuration is relatively simple, and ultramonkey seems to be less common, corosync than Heartbeat function is more powerful, more rich features . The following three

), HeartbeatHeartbeat has three versions of Heartbeat V1, Heartbeat v2 and Heartbeat v3Heartbeat V1 is the older version, Heartbeat v2 is the current stable version, which is used when doing experiments.(2), Corosync(Openais sub-project)(3), keepalive(4), CmanHeartbeat is a more commonly used software, keepalived configuration is relatively simple, and ultramonkey seems not commonly used, corosync than Heartbeat function is also strong, more rich features .The following three kinds of experiment

corosync+pacemaker+iscsi+httpd Implement Web High availability of servicesFirst, the introduction of softwareCorosync implemented is the Membership and Reliable Group Communication protocolPacemaker is based on corosync/linux-ha Implement service ManagementCorosync includes the following components: Totem Protocol EVS CPG CFG QuorumExtended Virtual synchrony algorithm (EVS) two features available: Synchronization of group membership lists; Reliable multicast for group messages. Pacemaker

popular online shop, which is the most people like to buy online? According to the latest statistics of the ebay Network, crystal, sterling silver necklace, color mobile phones, bedding, jeans and so on become the most searched keywords, these keywords from one aspect of people's shopping fashion, but also for the people want to do online business to provide a shop-oriented. First, jewelry Category: "Crystal", "jadeite pendant" hot. Jewelry classific

"phishing" event will be more and more. Wang Hongyang said: "The increase in user security awareness can reduce the risk of" phishing ", strict implementation of security policies, good security habits, security technology, can significantly reduce the" phishing "the probability of success. But before completing this article, the reporter browsed many domestic commercial websites, and did not find out about "phishing" or even the significant security hints, of course, did not see some verificat

divided into 13 different periods, each with 20 days each, and each day represented by a combination of numbers and a word. The number used is 1~13, with a total of 20 words, namely: Imix, IK, Akbal, kan, Chicchan, Cimi, Manik, Lamat, Muluk, OK, Chuen, EB, Ben, IX, Mem, CIB, C Aban, Eznab, Canac, Ahau. Note: Each day of the year has a clear and unique description, for example, at the beginning of the year, the date is described as follows: 1 Imix, 2

that almost every committed transaction can be recorded in In ib_logfile *, the secondary node can be restored to reduce the loss. Heartbeat has two modes. The default mode only supports two nodes. If the cluster contains more than two The CIB mode is required, that is, V2 style: 1) add all three nodes to ha. Cf, and add "CRM 1" to ha. Cf ″ 2). Use/usr/local/lib64/heartbeat/haresources2cib. py /Usr/local/etc/ha. d/haresources /Usr/local/var/lib/heart

can test for any failure or cluster status Pacemaker Internal Components650) this.width=650; "Src=" http://img.blog.csdn.net/20170801083507460?watermark/2/text/ ahr0cdovl2jsb2cuy3nkbi5uzxqva2fpcnvpmtiz/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/dissolve/70/gravity/ Southeast "alt=" here to write a picture describing "title=" "/> CRMD (Resource Management daemon): primarily as a message broker for Pengine and LRM, it also has to elect a leader to coordinate the activities of clus