failover

DG's core function is to provide high availability disaster, so the role-switching content described in this section is the most important part of DG. The role switching between DG Master and slave Libraries is divided into the following two kinds:

PIX 525 Product Essentials and application environment Cisco PIX 525 Firewall Application Environment The Cisco Secure PIX 525 Firewall is part of the world's leading Cisco Secure PIX Firewall series, providing unmatched security, reliability, and

1. Test topology: 2. Configuration steps: A. Test Heartbeat Connectivity: ①FW1: Interface Ethernet2 Nameif failover IP Add 192.168.1.1 255.255.255.0 No shut ②FW2: Interface Ethernet2 Nameif failover IP Add 192.168.1.2 255.255.255.0 No

How much is the server consolidation rate appropriate? Is there a risk to high server consolidation rates? The important fact that a novice needs to know is that server consolidation is not a single static number--without the right rate of server

Most Web applications with a certain importance on the Web require maintenance of a session state, such as the contents of a user's shopping cart. How you manage and replicate state in a clustered server application has a significant impact on the

NFS storage for ESX typically configures backup links. Automatically switch to the backup link when the primary link fails, which is called failover. Q: When will the failover be launched? A: When a storage link fails to be found. Q: How can I

MMM introduction: Mmm, Master-master Replication manager for MySQL (MySQL master replication Manager), is about the MySQL master replication configuration Monitoring, Failover and management of a scalable suite of scripts (at any time only one node

Problem With the release of SQL Server 2005, Database mirroring technology has become a very popular way to solve fault problems. A big problem with database mirroring, however, is that failover (failover) only works on the failed main library, and

Brief introduction Data center and service availability is one of the most important topics in the IT infrastructure and attracts more attention every day. Data replication between sites is a good way to minimize business disruption because the

Oracle 11g Dataguard Snapshot standby database functionality, which places the standby in open read/write state and simulates the test in the main library of the production environment. When the standby snapshot standby task completes, you can

To simplify the PIX firewall configuration, Cisco provides the adaptive Security Device Manager (ASDM). The adaptive Security Device Manager provides a powerful, easy-to-use interface for configuring the selected PIX firewall. (see Cisco's file or

We've built an experimental environment for Hyper-V livemigration and quickmigration in the previous article, and now we have a failover cluster that supports Hyper-V, with cluster shared volumes configured, There is a highly available virtual

The window cluster feature is installed by default. You only need to start Cluster Administrator configuration cluster, or use Cluster.exe to write configuration scripts. In addition, you can install Third-party quorum resources beforehand, and then

First, master. With the increase of the amount of data single MongoDB server has not met the status quo, so use the master-slave cluster Master-slave replication is the most MongoDB most commonly used replication methods, his biggest feature is

01. Welcome to use ueditor! MongoDB supports asynchronous data replication between different services to implement failover (failover, failover, failback) and redundancy (data redundancy). At the same time, only one service node (primary or

The following is a detailed analysis of the use of Oracle switchover and failover, the need for friends under the reference The role switching between Data guard master and subordinate libraries is divided into the following two kinds:1)

The introduction of Windows Server 2012 is called "Cloud operating System", presumably this operating system in the virtualization domain, at the network and storage level, in the access and security level will have a strong function. Today to

Error The following is the standby end of the Alertlog content in the case of the failover, unplug the primary network cable, simulate primary database environment suddenly damaged. --The downlink indicates that the standby redo log on the standby

SQL Server and virtualization are inherently a pair, and they become more and more coordinated. The coordination between them is not only workload management and consolidation, but also high availability. New technologies can provide multiprocessor

We've got the environment ready, the roles are all installed, and now we're starting to create clusters and configure clusters. First, we open the Failover Cluster Manager from the Admin tool, turn on both C1 and C2 OK, see common tasks, validate