rocket failover

not start resource 'ora. RAC. rac1.inst '. [Oracle @ racdb01 admin] $ crs_start ora. RAC. rac1.instCRS-1028: dependency analysis failed because:'Resource in unknown state: ora. RAC. rac1.inst'CRS-0223: Resource 'ora. RAC. rac1.inst 'has placement error. 19. I continued to search for information on the Internet. After a long time, it was still invalid.20. I saw an article on Metalink saying that tnsnarac. ora is faulty.21. Check my tnsnarac. ora and find that the original racdb service (for tran

MySQL master database High Availability-Dual-master single-active failover Solution Preface: (PS: Preface was added later when this article was modified.) Some bloggers raised some questions and opinions about this article and paid attention to it, it also prompted me to make this set of things more practical and safer. Later I thought about it and made some changes to some conditions and behaviors in the script. After several modifications, I finally

may consider configuring persistence on the slave instance. When the master instance goes down, you can manually or automatically promote the master instance from the instance to continue providing services! After the master instance is restored, the data is synchronized from the original Instance. After the synchronization is completed, the data is restored to the original master-slave state! To meet this requirement, we need the cooperation of keepalive. On the one hand, keepalive provides VI

#故障转移 Failover#当其中一个节点关闭宕机时, the service in its node is transferred to another node.The swarm detects that the node1 fails and marks the state of the fault node as down; Docker node LS to see the status of Node1 downAt the same time Swarm will dispatch the service on the Node1 to other resource nodes to run; Docker service PS Web_server to see its process and status#访问server#便于分析, redeploy aDocker Service Create--name=htdocs_nginx--replicas=3 NginxDoc

The role switching between the Data guard master and slave libraries is divided into the following two types:1) SwitchoverSwithchover are usually man-made, planned role-swapping, such as upgrades. It is usually lossless, i.e. there is no data loss. Its implementation is mainly divided into two phases:1.Primary converted to Standby2.Standby (one) converted to primary2) FailoverFailover refers to the fact that standby has to act as a primay role due to primary failure, which is likely to result in

Windows Fail-over Clustering is very useful for servers fail over, when configuring this function some common issues we mi Ght Encounter, I shared the solutions as follows:1) Cluster quorum setting cannot be successful.Most likely, it's due to access permission of the 3th share folders. We need to check whether the target folder permission includes all the related machine name (especially the fail over Clust ER name). As the sample below, configure all the related nodes has full Control authorit

Keepalived VIP automatic failover Keepalived: 1. The keepalived process is stopped. 2. track_script detection failed in keepalived. Haproxy Detection: Vrrp_script chk_haproxy {Script "killall-0 haproxy" # cheaper than pidofInterval 2 # check every 2 secondsWeight-2} Switch related logs: tail-f/var/log/messages Keepalived_vrrp [1, 32408]: VRRP_Script (chk_haproxy) failedKeepalived_vrrp [32408]: VRRP_Instance (VI_1) initialized ed higher prio advertKeep

Redis Sentinel Master-Slave Switching (failover) solution, detailed configuration Author: oyhk 2013-10-10 23:55:49 0 Reviews 629 views Redis Source Learning notes Master-slave replication Blog Category:Redis Redis C Redis Source Learning notes article List Because the picture is larger and the zoom is blurred, double-click to open the View ^_^ Master-slave replication is simply to synchronize data from one Redis database to another Redis database,

performance of Master is not good enough, you can use a new powerful enough machine first as slave, and then all the system downtime maintenance, then the slave into master, all services use the new master to continue to work. The conversion from this master to the replica set is then started. The advantage is that the downtime can be relatively short. Disadvantages ... The service was interrupted ... In addition, all systems point to the new master when the scale of the system may be modified

address in DNSThen switch to the WINS tab: Uncheck: Enable LMHOSTS lookup, disable the NetBIOS feature on TCP/IP, confirmThen change the network priority order;In a network connection----Click organize----TICK menu----advanced----Local Area Connection priority higher than heartbeat lineSecond HSR2 Configure the heartbeat line to open the VM virtual machine configurationThe steps are set in the same way as the first one, exceptConfigure heartbeat Address: 100.100.100.2 255.255.255.0; no need to

Slave status\g ' |grep "Slave_io_running" | awk ' {print $} ')slave_sql_running=$ (MYSQL-U$USER-P$PASSWORD-E ' show Slave status\g ' |grep "Slave_sql_running" | awk ' {print $} ')echo "plese fix the server of $IP error now!" > $mysql _path/letterletter= $mysql _path/letterMYSQL-P$PASSWORD-E "Use test;"if [[$?! = 0]]ThenMail-s "{$ip}_database connect lost the srcprits fix It Now"$email Killall-9 HeartbeatKillall-9 mysqld/etc/init.d/mysqld startSleep $sleeptimeMYSQL-P$PASSWORD-E "Use test;"If [$?

: -: GenevaINFO [7f2cb44a4700] [routing:failover] listening on0.0.0.0:7001; read-Write .- to- - A: -: atINFO [7f13125a2700] [routing:failover] listening on0.0.0.0:7001; read-Write .- to- - A: -: atINFO [7f2816b4a700] [routing:failover] listening on0.0.0.0:7001; read-Write .- to- - A: at:WuyiINFO [7fec2b5f4700] [routing:failover] listening on0.0.0.0:7001; read-Write .- to- - A: -:GenevaINFO [7ff971019700] [routing:failover] listening on0.0.0.0:7001; read-write [[email protected] bin]# MySQL-U

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Cisco ASA failover Command Injection Vulnerability (CVE-2015-0675) Release date:Updated on: Affected Systems:Cisco ASA 1, 5500Description:CVE (CAN) ID: CVE-2015-0675 The Cisco ASA 5500 Series Adaptive Security Device is a modular platform for providing security and VPN services. It provides firewall, IPS, anti-X, and VPN services. The failover ipsec function of Cisco ASA Software has a security vulnerab

Oracle10g physical master database and slave Database: switchover switch: Switch Under normal circumstances when the master database and slave database data are synchronized, mainly used for Master/Slave maintenance, switch drill, etc.; failover Switch Oracle 10 Gb physical master database and slave Database: switchover switch: Switch Under normal circumstances when the master database and slave database data are synchronized, mainly used for Master/S

DHCP Hot Backup Using the Failover protocol of DHCP I. Current backup solutions and Defects Currently, DHCP servers adopt the cold backup solution. Only one server provides services and the backup server is enabled only when the primary server goes down. The disadvantage of this solution is: 1. High switching latency when the primary server fails. In this case, you need to disconnect the master instance from the network and change the IP address of th

Introduction to the high availability of a replica set The replica set achieves high availability through automatic failover. When the master node fails, the slave node can be elected as the master node, and this process is automatically performed in most cases, manual intervention is not required. In some cases, data rollback is required for automatic failover. Deployment of replica sets (number of replica

How to fix the standby database after ORACLE 11G replica uard Failover, and restore uardfailoverProblem scenarios after failover:Due to the failover test, a standby database has been changed to the primary database. How can I change this new primary database (the original standby database) back to the standby database?Both are primary, p1, and p2. How can I set one primary database 1 to p1, And the other pr

Implement PostgreSQL failover in CentOS 6.5 Pgpool-II is an intermediate component that works between the PostgreSQL multi-server and the PostgreSQL Data Warehouse client. It provides the following functions: Connection Pool: pgpool-II is used to save and connect to the PostgreSQL server and reuse new connections with the same attributes (that is, the user name, data library, and Protocol version ), reduces the sales of connections and increases the o

The previous article has been prepared for the configuration of the mirrored database, and the next step is to enter the real configuration phase First, set security on the mirror database server and start the database mirroring session 1, expand the database, select Virtualmanagerdb, right-click Select Task-Mirror 2, click Configure security, select is, including the witness server 3, remove the witness server, the future configuration 4, set the principal server, fill in the end nam