openstack ha

variable Cat > ADMIN-OPENRC Demo User Environment variables Cat > DEMO-OPENRC Verify . ADMIN-OPENRC OpenStack Token issue +------------+-------------------------------------------------------------------------+ | Field | Value | +------------+-------------------------------------------------------------------------+ | Expires | 2016-05-24t10:56:18.447602z | | ID | Gaaaaabxrcvcpwwtz-w_oe0pgvi_97clytwfdlfeuwgwzwzrz8x0eir9nxomdjchcgadfg

Tags: managing databases Oracle RAC HAOracle HA High Availability detailed (one, client, server-side service details): Http://write.blog.csdn.net/posteditWe've seen Taf. Oracle's session can be automatically reconnected, it should be explained that this capability is based on the OCI, is a function of the OCI, JDBC Thin driver Invalid, because this driver is not built on the OCI library.Although this feature originated in RAC, TAF is not limited to RA

0. FrontierAfter a period of tossing and Juno, finally installed in their own Mac version of the four node environment. In this process, spent a lot of time, encountered a lot of problems, learned a lot of knowledge, toss a lot of things that do not need to toss, this article tries to make a summary of the process.1. Initial environmentDescription1. VirtualBox Ubuntu Installation: (VirtualBox NIC configuration visible http://www.cnblogs.com/sammyliu/p/4137772.html)The 14.04 server version is ins

; PARAMETERS[5]. Value = model. Returnorderreason; PARAMETERS[6]. Value = DateTime.Now.ToString ("yyyymmddhhmmssfff") + moDel. Userid.padleft (5, ' 0 ') + "RO"; Dbhelpersql.runprocedure ("Api_returnorder_add", parameters, out rowsaffected); return (int) parameters[0]. Value; } Stored procedures: CREATE PROCEDURE api_returnorder_add@returnorderid int output, @ProductSKUId int, @UserId int, @ReturnCount int,@ Applyreturnmoney Decimal (18,2), @ReturnOrderRe

DirectoryOpenstack-mitaka Overview of High AvailabilityOpenstack-mitaka High-availability environment initializationOpenstack-mitaka High-availability Mariadb-galera cluster deploymentOpenstack-mitaka High Availability of memcacheOpenstack-mitaka High Availability pacemaker+corosync+pcs High availability clusterOpenstack-mitaka Highly Available certification services (Keystone)Openstack-mitaka High Availability Computing Service (Nova)

The machine-level HA for the Nameserver of TFS can be done through the virtual IP mechanism. You only need a 'heartbeat' to solve the problem. The following is a simple example of the next step. ** Operating system **: 'centos 6.4 x86_64 '** Heartbeat **: ''' [root @ jdzhan1 ha. d] # rpm-q heartbeatheartbeat-3.0.4-2.el6.x86_64 ''' ----- ** Step0 **: Install Heartbeatyum installation and source code installa

Problem As we all know, in Python, The + operator can be used on the list, and the + operator only needs the second operand to be iterated (Original: iterable. @ Justjavac), then+ The operation can obviously be performed on "ha. The Code is as follows: >>> x = []>>> x += "ha">>> x['h', 'a']>>> x = x + "ha"Traceback (most recent call last):File "Answer When we use

Label: Oracle HA High Availability specific explanation (one, client, server-side service specific explanation): Http://write.blog.csdn.net/postedit We've seen Taf. Oracle's session can be connected on its own initiative, and it needs to be explained. This capability is based on the OCI and is a function of the OCI, and the JDBC Thin driver is invalid. Because such a drive is not built on the OCI library. Although this feature originated in RAC. But

The Hadoop version of the experiment was 2.5.2, the hardware environment is 5 virtual machines, using the CentOS6.6 operating system, the virtual machine IP and hostname are:192.168.63.171 Node1.zhch192.168.63.172 Node2.zhch192.168.63.173 Node3.zhch192.168.63.174 Node4.zhch192.168.63.175 Node5.zhch SSH password-free, firewall, JDK here is not a repeat. The role assignments for virtual machines are:Node1 main Namenode1, Master Resource Manager, zookeeper, JournalnodeNode2 to prepare namendoe1, zo

Due to the time relationship, the original plan on the Hadoop cluster2 implementation of Ha+nfs+zookeeper, changed to implement on the Hadoop cluster1, so that the SSH no password login configuration link and hadoop cluster configuration link. The configuration environment of this article is based on the HDFS HA series experiment Two: Ha+journalnode+zookeeper. 1:

first, the basic knowledge of OpenStackOpenStack is a free software and open source project that was developed and initiated by NASA and Rackspace to Apache2.0 licenses (compatible with GPLv3 and DFSG).OpenStack is an open source cloud computing management Platform project, composed of several major components to accomplish specific tasks. OpenStack supports almost all types of cloud environments, and the p

nodes, provide more than the dual-machine hot standby, higher functionality, to meet the changing needs of users.three ways to implement HA :(1) Master-SlaveUnder normal circumstances, the work is undertaken by the primary node, only when the primary node fails, the server will automatically switch to the slave node, the node will start the service, usually do not start the service, the primary server must have a cluster IP(vip), Services, Public sto

Configure Core-site.xmlConfigure Hdfs-site.xmlConfigure Mapred-site.xmlConfigure Yarn-site.xmlSend to other nodesModify RM 2.. N the node information aboveFormat ZK HDFs Zkfc-formatzkInitialize Journalnode:HDFs namenode-initializesharededitsYou need to start the process of each Journalnode node before the operation.Otherwise, formatting is unsuccessful.No reformatting of data is required to turn from non-ha to ha