switching email hosts

MHA on-line switchover is MHA in addition to automatic monitoring switching provided by another way, more for such as hardware upgrades, MySQL database migration and so on. This way provides fast switching and graceful blocking writes, regardless of

A few days ago, the user wrote to help achieve such a framework: only two machines, the need to implement one of the crash after another can take over the service of this machine, and two machines in normal service, both machines can be used. The

Basic elements (time, user, problem)The user only implemented the linux5.8+11.2.0.4 RAC environment, after a period of time, when switching the grid user, prompted resource temporarily unavailable, as follows:[Email protected] bin]# Su-gridSu:cannot

Http://www.netsetman.com/en/freewareNetSetManNetSetManis a network settings manager that can easily switch between 6 different, visually structured configurations, including: IP addresses (IPV4 and ipv6! )

1. Case 1:linux Basic protection measures2. Case 2: Assigning administrative rights with Sudo3. Case 3: Improve SSH service security4. Case 4:selinux Safety Protection1 Case 1:linux Basic protection measures1.1 QuestionsThis case requires practicing

1 Multimedia network Applications1.1 Multi-Media network applicationsMultimedia network applications can be divided into 3 categories if they are divided according to how frequently the user interacts with each other:1). Live Interactive Application

From: Author: (2001-11-2307: 08: 00) 1. the goal of the Simple Mail Transfer Protocol (SMTP) is to deliver mail reliably and efficiently. it is independent of the transfer subsystem and requires only one channel that can ensure the order of

From: Author: (2001-11-2307: 08: 00) 1. the goal of the Simple Mail Transfer Protocol (SMTP) is to deliver mail reliably and efficiently. it is independent of the transfer subsystem and requires only one channel that can ensure the order of

The knowledge of DRBD theory is not introduced in this article, this article mainly describes how to build DRBD.first, the system environment System Platform:Centos6.3 (Kernel 2.6.32-431.29.2.el6.x86_64)node One host name:CENOS-HA1

1. Introduction The goal of Simple Mail Transfer Protocol (SMTP) is to transmit mail reliably and efficiently, which is independent of the transfer protocol.The delivery subsystem only requires a channel that can ensure the sequence of transmitted