pacemaker xray

/lib/mysql-cluster/ After completing this step, you can use the following command to add an entry to init. d to automatically start the program.Echo "ndb_mgmd-f/var/lib/mysql-cluster/config. ini -- configdir =/var/lib/mysql-cluster/">/etc/init. d/ndb_mgmdChmod 755/etc/init. d/ndb_mgmd If everything goes well, the second management node follows the same steps and uses the same configuration. Do not change the ID in the node configuration fileYou can use the ndb_mgm command to verify the running o

cluster solution principles and implementation methods; based on case studies, describes how to use pacemaker configuration in the production environment to implement high-availability clusters; 10. Principles and implementation methods of resource management and stonith; 11. LVS and heartbeat are integrated to implement high-availability ctor and load balancing large-scale Application Server clusters, including ldirectord applications; 12. Storage p

, artificial respiration or pacemaker doesn't help ...... The thread is also a disposable item. 11. Stop the thread from running.A. Sleep. Sleep () methodThere are many reasons for a thread to sleep. For example, if the thread runs too fast, it needs to be slowed down to coordinate with other threads. When querying the stock price at that time, the thread queries every five minutes, it can save bandwidth, and the real-time requirement is not that high

mobile phones. 9. If the mobile phone or any of its parts cannot work properly, take it to the nearest qualified service provider for repair. What are precautions for using a GSM mobile phone? 1. using a mobile phone on the plane may interfere with the aircraft's communication network, endangering the plane's safety. Please turn off your mobile phone before boarding the plane. 2. Close your mobile phone at gas stations, chemical plants, oil depots, and blasting sites. 3. When using a mobile pho

DHCP request broadcast, all two dnsmasq services have been notified in the leases file that the ing relationship between AA: BB: CC: 11: 22: 33 and 10.0.0.2 should be allocated. Back to the low-availability L3 agent of the L3 agent, there is no (at least not) any high-reliability solution that DHCP can provide, but the user does need high reliability. What should we do? Pacemaker/corosync-use external cluster management technology to specify a sta

. P243:hummod is a simulated system that provides a top-down human physiology model from organs to hormones. The existing model contains more than 1500 linear/nonlinear equations, 6,500 state variables such as body fluids, circulation, electrolytes, hormones, metabolism, and skin temperature. Hummod is based on Arthur · Guyton (a eight HRG seven Yton) and Thomas • Coleman (Thomascoleman) developed in the early years of research in the early 1970s. P1364: So a charity pace4life from the funeral p

VirtualizationLet's take a brief introduction to these chapters. 　　 Chapter One: Curriculum overview 　　 Chapter II: Virtual Network advanced Features1. Configure NIC Bindings2. Configure VLAN3. Configure network filtering to improve security 　　 Chapter III: Virtual Machine migration1. Migration of virtual machines2. On-line migration requirements3. Static migration4. Dynamic migrationDynamic migration based on shared storageDynamic migration based on local storage 　　 Fourth: KVM Cluster overvie

How to activate a volume group exclusively on CentOS Requirement Background: The shared disk must be activated exclusively on the CentOS dual-host. That is, the shared disk is only attached to one machine, and the other machine cannot be mounted at the same time, if necessary, you can manually switch and mount to another machine. Implementation Method: relying on the rhcs cluster function, vgchange-a e is used for exclusive activation. I. Environment preparation # Cat/etc/redhat-releaseCentOS

replication failure, will not occur. Interactive (manually initiated) Master Failover (Interactive mode, manual triggering of Master Failover) MHA can be configured for manually initiated (non-automatic), interactive failover, without monitoring the master. Non-interactive master failover (Master failover in Non-interactive mode) Non-interactive, automatic master failover without monitoring the master is also supported. this feature is especially useful when MySQL master software monitoring is

first, or modify the configuration file to specify other directories. Directory:/MysqlData/clustermgmd-data//MysqlData/clusterndb1-data//MysqlData/clusterndb2-data//MysqlData/clusterapi/Data/socket/mysqld. pid/Data/socket//Data/log/Management Node[Root @ cluster-one ~] # Ndb_mgmd-f/mysqlData/config. iniMySQL Cluster Management Server mysql-5.5.29 ndb-7.2.10Data Node 1[Root @ cluster-one ~] # Ndbd -- defaults-file =/mysqlData/my1.cnf1186 02:35:42 [ndbd] INFO -- Angel connected to 'localhost: 100

core part of StormDB is reconstructed.Open-source protocols use the loose "Mozilla Public License" License to allow mixed use of open-source code and closed-source code. Complete ACID support Horizontally scalable Relational Database Service (RDBMS) Supports OLAP applications and adopts the MPP (Massively Parallel Processing: Large-scale Parallel Processing system) architecture mode. Supports OLTP applications and scalable read/write performance (note that the top priority is OLAP !!

involves redundancy as a way to avoid a single point of failure. fault-tolerant system design is another important aspect for increasing availability. The concept of raid was born at the University of California, Berkeley in 1987. raid is defined by levels, which specify the Storage Architecture and characteristics of the protection. you can learn more about the original raid concept in the seminal paper "a case for Redundant Arrays of Inexpensive Disks (RAID )." Ubuntu provides a useful page

replication failure, will not occur. Interactive (manually initiated) Master Failover (Interactive mode, manual triggering of Master Failover) MHA can be configured for manually initiated (non-automatic), interactive failover, without monitoring the master. Non-interactive master failover (Master failover in Non-interactive mode) Non-interactive, automatic master failover without monitoring the master is also supported. this feature is especially useful when MySQL master software monitoring is

user requests through it. It is called crm, during running, it needs to run a crmd process on each node. This process is usually monitored on a socket and the port is 5560. Therefore, the server is called crmd, the client is called crm (or crm shell) and is a command line interface. Through this command line interface, you can communicate with crm on the server. heartbeat also has its graphical interface tool, the heartbeat-GUI tool can be configured through this interface. The third version of

performance of moosefs. Here is the only place in the configuration file that can be adjusted for the performance. P.s. XFS used in moosefs is always dead. I am still honest and practical about ext3 .. (2011.11.10) For details about MooseFS, click hereMooseFS: click here Distributed File System (MooseFS) Install and deploy the MooseFS Distributed File System on CentOS MooseFS Distributed File System installation and configuration FAQ MooseFS Distributed File System Installation Wizard PDF

number of copies will always be 0 and will not be restored to the previous copy. The remaining storage space on the Chunkserver must be greater than 1 GB (referred to in Reference Guide), so that new data can be written. Otherwise, you will see a message about No space left on device, in practice, the test shows that when the disk usage reaches about 95%, the data cannot be written, and the available space is 1.9 GB. Hardware suggestion: A common machine is enough to store a few pieces of data,

too slow, because the heart "pump" out of blood, causing the human body hypoxia and ischemia, the emergence of compensatory ventricular acceleration movement to provide blood, ventricular movement too fast, but caused insufficient health, severe may lead to sudden death, or even die in sleep. Therefore, if the heart rate and pulse less than 50 times, should go to the hospital to do a detailed examination, find the cause, if it is pathological, serious people to install a

), Haproxy (four-layer, seven-layer can be achieved, but mainly seven-layer implementation), Nginx (Application layer implementation).Open source solutions for HA clusters include heartbeat, keepalived, Corosync+pacemaker, Cman+rgmanager, and Cman+pacemaker.The HP cluster is used in some special scenarios, which are not discussed here.2, LVS three types of introductionFirst, some basic knowledge of LVS to do some introduction:LVS, known as Linux virtu

RS2With RS1Node1# yum Install Corosync pacemaker Red Hat 6 removed CRMSH, therefore requires additional installation # Yum Localinstall crmsh-2.1-1.6.x86_64.rpm #vim/etc/corosync.confcompatibility:whitetanktotem{ version:2secauth:off threads:0interface { ringnumber:0 bindnetaddr:192.168.1.0 mcastaddr:239.255.1.1 mcastport:5405 ttl:1}} Logging{fileline:offto_stderr: noto_logfile:yes logfile:/var/log/cluster/corosync.logto_ syslog:yesdebug:off tim

. Execute make km-rpmG. Finally, you will be prompted:You are now :/root/rpmbuild/rpms/x86_64/drbd-bash-completion-8.4.4-4.el6.x86_64.rpm/root/rpmbuild/rpms/x86_64/drbd-udev-8.4.4-4.el6.x86_64.rpm/root/rpmbuild/rpms/x86_64/drbd-utils-8.4.4-4.el6.x86_64.rpm/root/rpmbuild/rpms/x86_64/drbd-xen-8.4.4-4.el6.x86_64.rpm/root/rpmbuild/rpms/x86_64/drbd-heartbeat-8.4.4-4.el6.x86_64.rpm/root/rpmbuild/rpms/x86_64/drbd-km-debuginfo-8.4.4-4.el6.x86_64.rpm/root/rpmbuild/rpms/x86_64/drbd-8.4.4-4.el6.x86_64.rpm/