ConditionsAlert #action must be taken immediatelyEmerg, Panic #system is unusableconfiguration file and writing syntax/etc/rsyslog.conf is the master configuration file for Rsyslog, which records which level of information the facility generates and where it is recorded. The basic syntax of rsyslog.conf is as follows, just give a few examples:authpriv.*/var/log/secureThis line indicates that all levels of information generated by the AYTHPRIV
J2SE NBSP;JAVATM Language Features For more information to the New Language. Generics this long-awaited enhancement to the type system allows a type or method to operate on objects of various types W Hile providing compile-time type safety. It adds Compile-time type safety to the collections Framework and eliminates the drudgery of casting. Refer to JSR 14. Enhanced for loop This new language construct eliminates the drudgery and error-proneness of iterators and index variables When iterating ov
to one facility item (translated as facility item = =) and one unary item (data penalty). Facility ItemsIn order to find more similar nodes, the model of fire extinguishers commonly used in sub-model optimization is defined as follows:Where Wij is the similarity between the node VI of each facility to be selected (i.e
Label:Once a 12C RAC database is installed on rhel7.2, one of the DB instances is often automatically crash. Viewing the alert log found the following error message: Errors in FILE/D12/APP/ORACLE/DIAG/RDBMS/RAC12C/RAC12C2/TRACE/RAC12C2_J000_21047.TRC:
ora-27157:os post/wait Facility removed
Ora-27300:os system dependent Operation:semop failed with status:43
ora-27301:os failure Messa Ge:identifier removed
ora-27302:failure occurred at:sskgpwwait1
Fri
Oracleserver. # cd/opt/oracle/instantclient_11_2/ # SCP 192.168.21.16:/oracle/orahome/product/11.2.0/bin/imp./ # Scp192.168.21.16:/oracle/orahome/product/11.2.0/bin/exp./ # CD rdbms/mesg/ # SCP192.168.21.16:/ORACLE/ORAHOME/PRODUCT/11.2.0/RDBMS/MESG/IMPUS.MSB./ # SCP 192.168.21.16:/oracle/orahome/product/10.2.0/rdbms/mesg/expus.msb./ Appendix Install oracleclientinstantclient in Linux system, but it lacks sql*loader, exp and other tools, this article describes how to install these command tools.
hardware-Reduced backup latency to 0-can now arbitrarily improve the scalability of the databaseData Center Policies1, relies on credit cards, so initially only managed hosting providers can be used2, managed hosting provider cannot provide scalability, cannot control hardware or use good network protocols3,youtube use colocation arrangement instead. Now YouTube can customize everything and contract its own contract4, using 5 to 6 data centers plus a
Updated:tue Dec 8 11:28:35 2015Last Change:tue Dec 8 11:28:28 2015Stack:corosyncCurrent Dc:controller2 (167772172)-Partition with quorumVersion:1.1.12-a14efad2 Nodes configured2 Resources configuredOnline: [Controller2 Controller3]MYVIP (OCF::HEARTBEAT:IPADDR2): Started controller2Haproxy (lsb:haproxy): Started Controller3Currently Haproxy resources on the node Controller3, on the Controller3 view Haproxy service status, is active:# Systemctl Status-l Haproxy.serviceDefining Haproxy and VIPs mu
configure colocation drbdfs_and _ms_drbdweb Inf:drbdfs ms_drbdweb:master configure order Ms_drbdweb_before_drbdfs Mandatory:ms_drbdweb:promote Drbdfs:start 3. The final result is as follows: configure show 650) this.width=650; "title=" 3.png "alt=" wkiom1ygszlgjlaaaalxj2tlimy467.jpg "src=" http://s3.51cto.com/wyfs02/M00/ 74/8e/wkiom1ygszlgjlaaaalxj2tlimy467.jpg "/>in the reshttpd and the Resip is the configuration of the last experiment, which ca
should run in that node, and whether it can run on a node is defined by resource constraint.Constraint: Resource constraints are divided into three categories Location: position ConstraintsUse fractions to define whether resources tend to run on this nodeINF: Tends to run on this node-inf: Not inclined to run on this node Colocation: permutation constraintsUse fractions to define whether a resource can run on one node at a timeINF: Capable of running
crack. In order for this mechanism to work effectively, there are at least 3 nodes in the cluster, and the No-quorum-policy is set to stop, which is also the default value. (Many tutorials for the convenience of demonstration, all the no-quorum-policy set to ignore, production environment if so, and no other arbitration mechanism, is very dangerous!) )
But what if there are only 2 nodes?
One is to pull a machine to borrow to fill 3 nodes, and then set the location limit, not to allocate resour
slave node each runs one copy, and can only run on these 2 nodes.For some cluster services, the startup-related resources are sequential. For example, to start a MySQL Cluster service, you should first mount a shared storage device, or the instant MySQL service starts up, and the user cannot access the data. So, generally, we need to constrain resources. There are several types of resource constraints:(1), Position constraint (location): the degree to which a resource tends to be a node, usuall
should first mount a shared storage device, or the instant MySQL service starts up, and the user cannot access the data. So, generally, we need to constrain resources. There are several types of resource constraints:(1), Position constraint (location): the degree to which a resource tends to be a node, usually defined by a fraction (score), which indicates that the resource tends to be associated with this node when score is positive, and a negative value indicates that the resource tends to fl
interval=" 0 "timeout=" 240s "Group Resources and constraintsEnsure that the drbd,mysql and VIPs are on the same node (Master) and determine the start/stop order of the resources through the group.Start: P_fs_mysql–>p_ip_mysql->p_mysqlStop: P_mysql–>p_ip_mysql–>p_fs_mysqlCRM (Live) configure# group G_mysql p_fs_mysql P_ip_mysql P_mysqlGroup Group_mysql always only on master node:CRM (Live) configure# colocation C_MYSQL_ON_DRBD inf:g_mysql ms_drbd_mys
-round" engineers and professionals. Engineers can write code and perform tests. Encourage Open Source and code to be "Transparent" in the company. After the code is mature, open source will be selected; create a virtual team + scrum. In terms of the large organizational structure, the product department and the R D department are separated by two different departments and different personnel management departments, colocation is enhanced through vir
1 Start the Docker service, which causes the running Docker to error if the Docker service stops, without switching2 Prepare the same image file on each node3 pcs resource Create My-docker1 docker image= "Index.alauda.cn/library/tomcat:9" name= "My-docker" run_opts= "-P 8,888:8,080 "4 Setting up PCs constraint colocation add my-docker1 VIP1 INFINITYThis article is from the "old section of the Cultivation of Life" blog, please be sure to keep this sour
timeout = 60 s op stop timeout = 60 s
Specify constraints to constrain all resources together
Crm (live) configure # colocation myweb inf: webip webserver webmysql webfs ms_drbd: Master
Define order
Crm (live) configure # order webfs_after_drbd inf: ms_drbd: promote webfs: start # mount the file system only when drbd is promoted to the primary node
Crm (live) configure # order webmysql_after_webfs inf: webfs: start webmysql: start # mysql can be star
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