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Oracle programming Art Study Notes (11)-Oracle Process

sKeduler for Resource Manager354830DC qmnc aq Coordinator354825D4 ARC3 Archival Process 335481ACC ARC2 Archival Process 235480FC4 ARC1 Archival Process 13547F9B4 ARC0 Archival Process 03547D89C MMNL Manageability Monitor Process 23547CD94 MMON Manageability Monitor Process3547C28C RECO distributed recovery3547B784 SMON System Monitor Process3547AC7C CKPT checkpoint3547A174 LGWR Redo etc.3547966C DBW0 db writer process 035478B64 MMAN Memory Manager3547805C DIA0 diagnosibility process 035477554 P

In-depth analysis of basic concepts of vswitch Technology

the industry. The call control device with the 323 protocol as the notable feature is called the Gatekeeper keeper, and the call control device with the SIP protocol as the notable feature is called the proxy service ProxyServer. In addition, although the soft switch supports the access of smart endpoints, video endpoints, and multimedia endpoints, it does not mean that all voice, data, and video services must be centrally implemented on the softswit

Python filters out class instances that do not belong to characters in a specified set

This article describes how to filter strings that do not belong to a character class in a specified set in python, and describes how to operate strings and collections in Python, for more information about how to filter strings in python, see the following example. Share it with you for your reference. The details are as follows: #-*-Coding: UTF-8-*-import setsclass Keeper (object): def _ init _ (self, keep): self. keep = sets. set (map (ord, kee

Implementation details of the Laravel user authentication system

* @return Mixed * /protected function Callcustomcreator ($name, array $config) {return $this->customcreators[$config [' Drive R ']] ($this->app, $name, $config); }/** * Register a custom closure guard drive to the customcreators attribute * * @param string $driver * @param \closure $cal Lback * @return $this */Public Function extend ($driver, Closure $callback) {$this->customcreator s[$driver] = $callback; return $this; }/** * Register a custom user provider creator into the custo

How to Use jQuery + PHP + MySQL to implement an online test project_php tutorial

json format data to the front-end for calling. Quizs. js We modified the js code mainly for the ajax interaction section in the front and back. The core section of quizs. js is as follows: ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 If (config. sendResultsURL! = Null ){ Var collate = []; Var myanswers = ''; // Obtain the user's answer For (r = 0; r Collate. push ('{"questionNumber": "' + parseInt (r + 1, 10) + '", "userAnswer ": "'+ userAnswers [r] +

"Original" "Android" uncover ART details----garbage collection

is very high, in memory tense when the action will be frequently executed, which will cause the drop frame, interface lag phenomenon. Figure 3: Why the GC in D Alvik so lame? from diagram 3 You can see that when you find that you need to give a larger object ( Span style= "color: #3366ff;" > blue squares ) When allocating space, it is still sufficient to find free space, but there is not such a large contiguous space for new objects to use, this time you have to do a GC Recycli

Location of Hadoop

associated with Phoenix,spark SQL to find out.SparkSpark is a memory-computing framework. A big trend at the moment. MapReduce has a lot of IO operations, and Spark is calculated in memory. The speed is 10 times times that of Hadoop (as the official website says). Spark is a current trend that needs to be understood.ZookeeperZookeeper, animal keeper. Zookeeper is called distributed Collaboration services. The main functions are unified naming, state

< translation >zookeeper official documents

instance, whenever a client retrieves data it also receives the version of the data.The data stored at Znode a namespace are read and written atomically. Reads get all the data bytes associated with a znode and a write replaces all the data. Each node has a Access Control List (ACL) that is restricts who can do.ZooKeeper also has the notion of ephemeral nodes. These znodes exists as long as the session that created the Znode is active. When the session ends the Znode is deleted. Ephemeral nodes

A little thought on the three-body sword-holder

In fact, the core of the three bodies is the conflict between the dark forest law and human nature, and the role of the sword-holder is the concentrated embodiment of this contradiction.The sword-keeper, who is the guardian of human civilization and the greatest mockery of human democracy, is an embarrassing scenario for preserving human democracy in authoritarian form.But that's the way it is, and only in extreme scenarios. This is the truth of thing

About the etiquette of git

traditional same strain, Git gives you a lot of "mechanics" that you can hold on to, and then you don't know what's wrong. So you often listen to someone say: "Not git allows you to do this, you can do it!" The philosophy of UNIX is not to stop stupid people from doing stupid things ... " If you do not know some of the rules of GIT users when you submit your code, someone will yell: "Rebase again!" "Don't push to master!. "Don't merge!. "" Squash commits! "If you don't use git submodule and stu

Individual members of the Hadoop family

tables, hive can tell the data map into a data table, and then the operation is convenient, its disadvantage is the slow speed.4. HBaseSince hive is slow, is there a faster database? HBase is that he was born for a query, and the query was fast.5, SqoopBefore there are many well-known database like mysql,oracle, my data are in this, how to import into HDFs? Sqoop provides a reciprocal conversion between a relational database and HDFs.6, FlumeWorking on so many computers, if one of them is a bit

Get the active name node information for HDFs from zookeeper

String Hadoopzknode = "/hadoop-ha/${cluster_name}/activestandbyelectorlock";ZooKeeper keeper = new ZooKeeper (${zookeeperconnection}, 10000, new Simplewatcher ());Stat stat = new stat ();byte[] data = Keeper.getdata (Hadoopzknode, New Simplewatcher (), stat);Because HDFs serializes data before it is written to zookeeper, it needs to be deserialized by calling the appropriate deserialization method when it gets to the byte arrayActivenodeinfo Activeno

UVA 165 Stamps (backtracking)

. Unfortunately the formula relating n(h,K) to H,K and the values of the stamps Has been lost--it is published in one of the government reports but No-one can remember which one, and of the three Rese Archers started to search for the formula, and the boredom third a job as a took lighthouse keeper It provided more social stimulation.The task has now been passed in to you. You doubt the existence of a formula in the first place so you decide to write

Some big data tools, noun records.

change and difficult to manage. Even when did correctly, different implementations of these services leads to management complexity when the applications is deployed.What ' s his aim?ZooKeeper aims at distilling the essence of these different services into a very simple interface to a centralized Coordin ation service. The service itself is distributed and highly reliable. Consensus, group management, and presence protocols would be implemented by the service so, the applications does not nee D

Design Pattern: Policy mode

passes the request through the context to a specific policy. A connection helper class consists of an interface and a class that can be used to connect aMySQL database.client.phpTo trigger a method of different specific policies (encapsulated algorithms), HTML invokes one of the following PHP trigger scripts.inserttrigger.phpdisplaytrigger.phpfindtrigger.phpupdatetrigger.phpkilltrigger.phpContext classes and strategy interfaces in the state mode design, the context is equivalent to a "tracker"

<< Open Source hardware maker 15 cool apps play with Raspberry Pi >>

Install Google coder11.3.2 using Google coder11.4 SMS Server11.4.1 Installing and configuring the SMS Service11.4.2 Using SMS Service12th chapter "Door Keeper"-Cloud monitoring12.1 Image Monitoring12.1.1 Installing and using Fswebcam12.1.2 Yeelink Remote Image Acquisition12.1.3 upload image to Baidu Cloud12.2 Video Surveillance12.2.1 Local Surveillance Live12.2.2 Installing and configuring remote monitoring motion12.2.3 Remote access to surveillance

The cutting point, the bridge and the double connected branch of the graph

the bridge is added back, the last figure must be a tree, the edge connectivity is 1.The number of nodes in the tree is 1, that is, the number of leaf nodes, which is recorded as Leaf. Then at least add (leaf+1)/2 edges to the tree to make the tree reach the edge two, so at least the number of edges added is (leaf+1)/2. The method is to first connect an edge between the two nearest common ancestor's two leaf nodes, so that the two points can be shrunk to the path of the ancestors, because a for

Large scale leaderboard system practice and challenge

mysql binlog stability, friendly SQL interface, configurable replication mode according to Business scenario system availability is not as good as ETCD, zoo Keeper etcd Raft Strong consistency, high availability, more mature, kubernetes and other large-scale projects are widely used, but are still in the fast Development, the team has not applied in the production environment

The cutting point, the bridge and the double connected branch of the graph

the bridge is added back, the last figure must be a tree, the edge connectivity is 1.The number of nodes in the tree is 1, that is, the number of leaf nodes, which is recorded as Leaf. Then at least add (leaf+1)/2 edges to the tree to make the tree reach the edge two, so at least the number of edges added is (leaf+1)/2. The method is to first connect an edge between the two nearest common ancestor's two leaf nodes, so that the two points can be shrunk to the path of the ancestors, because a for

Zookeeper Getting Started: Basic concepts, 5 configuration, starting

configure the ZOO.CFG in the Conf directory. Copy-paste-rename once.4.Windows start, do not need to take "start" parameter, direct zkserver.cmd, really enough pit.Zoo.cfg# The number of milliseconds of each tickticktime=2000# the number of ticks, the initial # synchronization phase can T akeinitlimit=10# the number of ticks so can pass between # Sending a request and getting an acknowledgementsynclimit=5# The directory where the snapshot is stored.# does not use/tmp for storage,/tmp here is jus

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