boingo outage

Today, the data center suddenly experienced a power outage and the power outage lasted for a long time. As a result, UPS also stopped working. So I picked up the book of changes that I had no time to read.Zhou Yi's principles are too broad, so you need to taste them slowly: "Heng", JIU Si: Tian wupoultry.Righteousness: whether a person succeeds depends not only on whether there is a conservation lasting he

module exists, so as to tune.If you say this time you directly to the two sets of code to test, give the September 4 after the performance of the package after the bottleneck where the indicator how. OK, you're already wrong.If you say this time you step in, tell him XXX module has serious performance problems, how to tune. OK, you're half right, half wrong.My first test was that 1 and 21 were done, and the results were not satisfied and were asked to redo.What's the reason? Mainly this, the sy

OS:[Email protected] ~]# more/etc/oracle-releaseOracle Linux Server Release 5.7Db:Oracle Database 11g Enterprise Edition Release 11.2.0.3.0-64bit ProductionPL/SQL Release 11.2.0.3.0-productionTest:1, the database control file backup2, delete the existing control files, with the backup of the control file to restore, there is an old control files error3, the server suddenly power outage, will also cause this situationReason:According to the principle o

outage or shuts down unexpectedly, the database does not shut down cleanly, then the database will be crash recovery when it is started. However, if the database parameter AutoRestart is set to OFF, DB2 does not crash RECOVERY after starting the database. About crash recovery, in the Db2diag.log log will have a relevant expressionThis scenario is reproduced below:[CPP]View Plaincopy /* 1 set AutoRestart to OFF */ [Email protected] ~]$ DB2

above code to achieve the other two ways: minimum number of connections:upstream a.com {Least_conn;Server 192.168.5.126:80;Server 192.168.5.27:80;}Ip-hash:upstream a.com {Ip_hash;Server 192.168.5.126:80;Server 192.168.5.27:80;}What if one of the servers goes down? When a server goes down, does it affect access?Let's take a look at the example above, assuming that the C server 192.168.5.126 the machine is down (because it can't emulate the outage, so

configuration based on the notifications received, and continue watch/service/common-conf 3. Team member Management (Group membership)In a typical master-slave structure distributed system, master needs to manage all the slave as "explorer", when slave joins, or slave down, master needs to perceive this and then make the corresponding adjustments, So that it does not affect the entire cluster to provide services externally. In HBase, for example, Hmaster manages all the Regionserver, and w

uncertainties in the global economic outlook.Oil prices fell in Thursday. Despite an oil pipeline outage, the EIA data show that the U.S. crude oil futures contract delivery to the warehouse in the weekly inventory increase. But short-back compensation has reduced oil prices, suggesting that the future may be more volatile. Jim Ritterbusch of Ritterbusch Associates, an oil market consultancy, said: "Energy market investment is still volatil

Whether the Android system or VxWorks with other real-time systems, there are often situations in which the system wakes up and the debugging process is interrupted. The system is awakened, sometimes normal wake-up, for example, when the interrupt timer to wake up the system processing business, sometimes, abnormal awakening, let us set the time-out unreasonable, the system will cause power consumption, battery is very quickly exhausted, reduce the terminal standby or use time, At this point we

server information acquisition programs on two database servers, respectively. The daemon is used to monitor the running state of the other database server, start setting up Database server 1 master, and database server 2 as the standby machine. If the database server 1 has a single subnet, database server 1 writes the failure situation to the database itself, if the database server 1 has a dual network outage, database server 1 cannot write records

Original link: http://blog.csdn.net/chjttony/article/details/62404571.Websphere JVM-related problem diagnosis:The WebSphere problems caused by the JVM mainly include application server outage and performance degradation, and the characteristics of JVM-related problems are as follows:(1). WebSphere Application Server stops responding:A.websphere server outage.The b.websphere process hangs.C.JVM memory overflow.(2). Performance degradation:The JVM proce

, unique identifier of the breakpoint. Type: The field where the breakpoint is a breakpoint, a watch point, or a capture point. Disp: Deployment, there is one deployment for each power outage, but what happens on that breakpoint the next time the breakpoint causes GDB to pause the execution of the program. There are 3 possible deployment types. Keep: Hold, the breakpoint is not changed the next time the breakpoint is reached. The default deployment af

1, the site is a video playback, looked at seven of the help of cattle documents, some Meng Circle, ask everyone process 2, function one is to upload the video, can not determine the size of the video, consider a power outage continued transmission 3, upload the video can not be sure is a certain format, consider the video has transcoding 4, upload the video has a link address, play video can have drag function Process 1 (SELECT video)-->2 (link seven

distributing users in different regions. for example, each partition only processes a certain number of users, the cluster has more partitions (refer to the Flickr scalable report, http://mysqldba.blogspot.com/2008/04/mysql-uc-2007-presentation-file.html ). In the first example, the hardware can be more easily scaled based on actual usage (the number of read/write operations on the entire system). However, Flickr is based on its users (however, it is mandatory to assume that the user's usage is

There is a brother who lives on the 80 th floor. One day they went home on a trip and found the building had a power outage! Although they carry large bags of luggage, there seems to be no other choice, so my brother said to his brother, we will climb the stairs! As a result, they carry two bags of luggage and began to climb the stairs. When they climbed to the 20th floor, they began to get tired. His brother said, "The bag is too heavy. Let's put it

. It will be a person in the future, just like poetry. In the 24-year-old body, there should be no 24-year-old soul after the injury... Having a dream that cannot be realized is a sin .. I am always remembering, endless memories Illusion is wrong, and fantasy is wrong. I always thought it would be better today, but the end is desperate. Thank you for remembering my birthday. In the past four years, I have been so far away from you. But what then! Come on, sleep. You have to live your own

In general, the server system has a fixed IP address, which can ensure that it can always run stably and efficiently, even if other computers in the LAN use the fixed IP address, the running status of the server system will not be affected, because the allocation and use of IP addresses often follow the principle of "first-in-first-out", that is, after the server host is pre-allocated with a fixed address, other users cannot access the Internet even if they have used this address. However, in my

hardware chips, circuits, resistors, etc. If you are performing disk read/write operations when a power failure occurs, a bad track may occur, or when you are writing a document, data will be lost ...... A proper strategy: select a brand of power supply for computer configuration, so as to minimize the adverse effects of voltage fluctuation on hardware. After a power outage, turn off all power supplies to prevent the display and some ATX power suppli

God: "Lord, I will dedicate myself to the rest of my life and serve you in war. Why are you not willing to save me !" God said, "How do IWon't you save? For the first time, I sent a boarding board to save you. You don't need it. I thought you were worried about the danger of the boarding Board. For the second time, I sent another speedboat. You still don't need it. For the second time, I treat you with the courtesy of guobin and send another helicopter to save you,You are reluctant to accept th

log file name [/var/log/redis_62.16.log]/usr/local/redis-2.8.17/log/redis_62.16.logPlease select the data directory for this instance [/var/lib/redis/6379]/usr/local/redis-2.8.17/data/6379Please select the redis executable path [/usr/bin/redis-server]Selected config:Port: 6379Config file:/usr/local/redis-2.8.17/conf/redis_62.16.confLog file:/usr/local/redis-2.8.17/log/redis_62.16.logData dir:/usr/local/redis-2.8.17/data/6379Executable:/usr/bin/redis-serverCli Executable:/usr/bin/redis-cliIs thi

http://blog.csdn.net/chychc/article/details/8313458Ecos Interrupt Model (1) ISR and DSREnglish full name Interrupt Service RoutineInterrupt handling is an important part of the real-time operating system. It is important to deal with interrupt sources in a timely manner, but some actions that must be considered atomic operations (which cannot be interrupted) have a very serious effect on timeliness. Because these actions are performed, disable interrupts are required. To minimize this action, en