Zookeeper Github

Getting Started. Note that there is a bug in Kerby that is not yet fixed in the 1. ZooKeeper is a high performance, scalable service. You can run the following example to see how to add new data to ZooKeeper, recover it, and delete the created registries: Use the list command to see the data stored in the instance: $ ls / [zookeeper] Create a new directory (in this example, test directory which includes the string mydata) using the create / command. Directed by Niki Caro. The disk that ZooKeeper was using filled up. The canonical reference for building a production grade API with Spring. This document contains information to get you started quickly with ZooKeeper. Marathon is a powerful way to run other Mesos frameworks: in this case, Chronos. Note that some features of GitHub Flavored Markdown are only available in the descriptions and comments of Issues and Pull Requests. It is aimed primarily at developers hoping to try it out, and contains simple installation instructions for a single ZooKeeper server, a few commands to verify that it is running, and a simple programming example. by Shahriar Shovon. Finagle implements uniform client and server APIs for several protocols, and is designed for high performance and concurrency. For recoverability purposes, ZooKeeper efficiently logs updates to disk and forces write operations to be committed to disk prior to applying the changes to the in-memory. but what happens when neither?. ZooKeeper C++. The Zookeeper's Wife is a 2017 war drama film directed by Niki Caro, written by Angela Workman and based on Diane Ackerman's non-fiction book of the same name. jar in the folder. Also, learn how to install and set up SQLLine on your computer to connect to an HBase cluster in HDInsight. How The Kafka Project Handles Clients. sakserv » hadoop-mini-clusters-zookeeper » 0. Scaling is not currently supported. _emphasized text_After upgrading from zookeeper 3. create、setData、delete等这些引起zookeeper节点变化的API会触发watcher process的执行。 服务端WatchManager,服务端的watcher对象管理器; 注册watcher时候,会在服务端调用FinalRequestProcessor. Read and write streams of data like a messaging system. Skip to content. Net --version 3. com:stockgeeks/spirng. Apache Kafka: A Distributed Streaming Platform. These nodes are automatically removed, when the instance stops or crashes. 1) In order to connect with Apache phoenix, the user needs to provide the IP of active zookeeper node. Continue reading for some more details that was explored while troubleshooting this issue ADF uses livy server to submit job, scheduled a python job to be processed part of pipleline every 15 minutes. com uses its own version of the Markdown syntax that provides an additional set of useful features, many of which make it easier to work with content on GitHub. gz is standard source-only release, apache-zookeeper-X. Co-ordinating and managing a service in a distributed environment is a complicated process. Service discovery with ZooKeeper Edit on GitHub You can put the list of available Endpoint s into a zNode in Apache ZooKeeper cluster as a node tree, like the following:. Most of Finagle’s code is protocol agnostic, simplifying the implementation of new protocols. Skip to content. This means the Marathon scheduler processes are started directly using init, upstart, or a similar tool. Integration with gRPC and Thrift ¶. Sign up 分布式系统服务ZooKeeper的学习历程. Finagle is an extensible RPC system for the JVM, used to construct high-concurrency servers. /gradlew build from the project root. some times i am the leader, most of the times i follow. ZooKeeper Basics. It is possible that Hive may fail to establish a connection to Zookeeper, which prevents the Hive View from launching. A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2. ZooKeeper is a distributed co-ordination service to manage large set of hosts. In other words, if it cannot guarantee correct behaviour it will not respond to queries. Scaling is not currently supported. Igor Natanael tem 4 empregos no perfil. It was started by Yahoo developers to overcome their issues in distributed applications and later on it was undertaken and developed by the Apache foundation. 256 Mb RAM if third-party components (SQL, NoSQL, Zookeeper, etc. Introduction. However, when I began working for Netflix, I found a lot of interest in ZooKeeper but not a lot of experience. A small library for managing deep learning models, hyper parameters and datasets designed to make training deep learning models easy and reproducible. Setting up an external Zookeeper Solr Cluster. GitHub Gist: instantly share code, notes, and snippets. It is a distributed system for, among other things, managing coordination across a. Fully Task-based Asynchronous (async/await). Once created, the handle starts of in the CONNECTING state and the client library tries to connect to one of the servers that make up the ZooKeeper service at which point it switches to the CONNECTED. This is the big picture of the architecture, the API Gateway is Kong, the Messaging Service Kafka and the Database per Service MongoDB. Each ZK node should be aware of other ZK instances to form a quorum of 3. Your gRPC or Thrift service implementation runs on top of Armeria without any modification. Looking for a reliable and scalable Zookeeper cluster? Try the Bitnami ZooKeeper Cluster, which provides a fault-tolerant, synchronized system for coordinating distributed applications. View on GitHub Spring Cloud Service Registration and Discovery - Spring Boot and Apache ZooKeeper This is a repository for Spring Boot Zookeeper Example. An ensemble's membership can not be updated in a safe way in ZooKeeper 3. A logical set of servers registered in ZooKeeper. dotnet add package ZooKeeper. ZooKeeper was a sub-project of Hadoop but is now a top-level project in its own right. [ZOOKEEPER-1702] - ZooKeeper client may write operation packets before receiving successful response to connection request, can cause TCP RST [ZOOKEEPER-1706] - Typo in Double Barriers example [ZOOKEEPER-1711] - ZooKeeper server binds to all ip addresses for leader election and broadcast. /gradlew build from the project root. It groups containers that make up an application into logical units for easy management and discovery. This section documents the process of merging code changes contributed via Github Pull Requests. In this quickstart, you learn how to use Apache Phoenix in HDInsight. Hadoop Mini Clusters ZooKeeper » 0. /server/build/libs/ The jar can be executed using:. Toggle navigation. Each znode in the tree stores a maximum of 1MB of data (by default). For security configuration settings, refer to the database official documentation. Zookeeper, or ZK for short, is a distributed CP datastore based on a consensus. All gists Back to GitHub. Mirror of Apache Hadoop ZooKeeper. Running a zookeeper and kafka cluster with Kubernetes on AWS I have been recently working with Russ Miles on coding microservices that follow principles he has laid out in the Antifragile Software book. While Zookeeper 3. When a server crashes, it can recover its previous state by replaying the WAL. 11, without editing zoo. Note that some features of GitHub Flavored Markdown are only available in the descriptions and comments of Issues and Pull Requests. Raft is a consensus algorithm that is designed to be easy to understand. We saw the rise of JavaScript with NodeJS. Assignee: Chris Thunes. ZooKeeper follows a simple client-server model where clients are nodes (i. The ZooKeeper is also responsible for configuration management, leader detection, detecting if any node leaves or joins the cluster, synchronization, etc. a zookeeper client, that makes life a little easier License: Apache 2. It includes a highlevel API framework and utilities to make using Apache ZooKeeper much easier and more reliable. A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2. Since Zookeeper works as periodically commit offset so that if any node fails, it will be used to recover from previously committed to offset. x With Zookeeper Service Discovery Time for a lesson in service discovery! See how you can integrate Vert. The ZooKeeper source code resides in the Apache Git repository: There is also a github mirror at:. Apache ZooKeeper is an invaluable tool for distributed coordination. You can use either a shared or dedicated ZooKeeper cluster. The disk that ZooKeeper was using filled up. Troubleshooting the connectivity issue with Apache Phoenix via JDBC or sqlline. This article is about ansible-cmdb a very nice solution for gathering your ansible facts into a visual format. It's used by projects like Apache Hadoop, HBase and others for different use cases like leader election. ZooKeeper follows a simple client-server model where clients are nodes (i. That’s where Gogs comes in. There are two main ways to receive watch notifications: the global watch or through use a watcher objects. apache-zookeeper-X. 13 on Ubuntu 18. Solr powers the search and naviga. Jobs are separated into a list of those which should be run at the current time (based on the clock of the host machine), and those which should not. It provides 5 servers with a disruption budget of 1 planned disruption. Running kafka-docker on a Mac: Install the Docker Toolbox and set KAFKA_ADVERTISED_HOST_NAME to the IP that is returned by the docker-machine ip command. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Kubernetes ZooKeeper. com uses its own version of the Markdown syntax that provides an additional set of useful features, many of which make it easier to work with content on GitHub. > However, we prefer that the community provided by the Apache Software > Foundation. Package zookeeper provides a zookeeper registry. Hello, Is there a modern, tested, and recommended C++ client for interacting with ZooKeeper? I've seen a few references around the web to spikes toward an implementation and a couple examples on GitHub, but am not aware of many in active use. firewall the ZooKeeper service and only allow access to trusted applications using it for coordination. In attempting to upgrade Solr's ZooKeeper dependency from 3. Update 2019-07-23: @insumity explains that ZooKeeper sync+read is not, in fact, linearizable-there are conditions under which it might return stale reads. Intended to be used by both servers in a common service and their clients. Install Apache Kafka on Ubuntu. ZooKeeper Client Bindings. Three different manifests are provided as templates based on different uses cases for a ZooKeeper ensemble. However, when I began working for Netflix, I found a lot of interest in ZooKeeper but not a lot of experience. by ex-googlers, for ex-googlers - a lookup table of similar tech & services A handy lookup table of similar technology and services to help ex-googlers. Join GitHub today. Mirror of Apache Hadoop ZooKeeper. Starting with the 0. zip Download. /server/build/libs/ The jar can be executed using:. Both Zookeeper and Consul latency spikes grow after about half a million keys. It provides 5 servers with a disruption budget of 1 planned disruption. ZooKeeper Basics. x is also used in production. A simple Chef report handler to send notifications to Zookeeper about Chef runs. Apache Zookeeper is a highly available coordination service that is used by distributed systems such as Hadoop(via YARN), Spark, Mesos, Kafka, HBase, and many others. Kaa supports the following operating system families and provides installation packages for each of them. Solr powers the search and naviga. Scaling is not currently supported. x through 2. It groups containers that make up an application into logical units for easy management and discovery. Run Apache Kafka and Apache ZooKeeper on OpenShift v3. Finagle implements uniform client and server APIs for several protocols, and is designed for high performance and concurrency. Prior to version 3. It includes a highlevel API framework and utilities to make using Apache ZooKeeper much easier and more reliable. gz is the convenience tarball which contains the binaries Thanks to the contributors for their tremendous efforts to make this release happen. apache-zookeeper-X. Bitnami ZooKeeper Stack Multi-Tier Bitnami offers multi-tier templates to improve the capacity of single VM applications. The service itself is replicated over a set of machines that comprise the service. We aggregate information from all open source repositories. This means that it does not have a real maintainer at the moment. ZooKeeper solves this issue with its simple architecture and API. No spikes happen with etcd, owing to efficient concurrent snapshotting, but there is a slight latency increase starting slightly before a million keys. The pinnacle of the Swarm, Kubernetes, Mesos [Editor's Note] This article compares the three major scheduling frameworks: Swarm, Kubernetes and Mesos. Building a Kafka and Spark Streaming pipeline - Part I Posted by Thomas Vincent on September 25, 2016 Many companies across a multitude of industries are currently maintaining data pipelines used to ingest and analyze large data streams. Building real-time streaming data pipelines that reliably get data between systems or applications, transform or react to the streams of data. Corosync Quality. gz Chef Handler Zookeeper. ZooKeeper C++. All three have server nodes that require a quorum of nodes to operate (usually a simple majority). Kubernetes ZooKeeper Manifests. /gradlew build from the project root. Setting up an external Zookeeper Solr Cluster. ZooKeeper has a built-in sanity check of 1M, to prevent it from being used as a large data store, but in general it is used to store much smaller pieces of data. Any write operation you perform will be done in a transaction against the ZooKeeper cluster. Package zookeeper provides a zookeeper registry. A value that is zero or negative indicates that no limit is enforced. Name Email Dev Id Roles Organization; Stefan Groschupf: sg101tec. Docker image packaging for Apache Zookeeper. In ZOOKEEPER-2574, the documentation change (https://github. Contribute to apache/zookeeper development by creating an account on GitHub. It provides 5 servers with a disruption budget of 1 planned disruption. The standard Zookeeper client for Java defaults to a limit of 1mb. Edit on GitHub Welcome to Central Dogma ¶ Central Dogma is an open-source highly-available version-controlled service configuration repository based on Git, ZooKeeper and HTTP/2. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Each Microservice is implemented following the Hexagonal architecture style: the core logic is embedded inside a hexagon, and the edges of the hexagon are considered the input and output. What is ZooKeeper? ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. Yeshvant has 5 jobs listed on their profile. com:stockgeeks/spirng. yaml provides a manifest that is close to production readiness. Join GitHub today. com/apache/zookeeper/pull/111/) was done directly on the generated document files instead of on the. Published on Feb 16, 2013. How The Kafka Project Handles Clients. Marathon is the first framework to be launched, running directly alongside Mesos. 11, without editing zoo. The following table lists the default ports used by the various HBase services. Sign in Sign up Instantly share code, notes, and snippets. Curator is a set of Java libraries that make using Apache ZooKeeper much easier. ZooKeeper is an open source software that enables resilient and highly reliable distributed coordination. In fact, the code is almost identical. c to understand how to use the two API. This project contains tools to facilitate the deployment of Apache ZooKeeper on Kubernetes using StatefulSets. A few trials had been done but none of them made it out of the testing sandbox. The ZooKeeper is also responsible for configuration management, leader detection, detecting if any node leaves or joins the cluster, synchronization, etc. x with Zookeeper by making use of service discovery. Welcome to the Cloudera Community Your Enterprise Data Cloud Community. Chef-handler-zookeeper A simple Chef report handler to send notifications to Zookeeper about Chef runs. ZooKeeper is a distributed co-ordination service to manage large set of hosts. Apache Dubbo™ is a high-performance, java based open source RPC framework. but what happens when neither?. Note that there is a bug in Kerby that is not yet fixed in the 1. Bitnami ZooKeeper Stack Virtual Machines Bitnami Virtual Machines contain a minimal Linux operating system with ZooKeeper installed and configured. Versions before and after 3. broken dependencies, exceptions, important pieces of information and other issues. It is a distributed datastore that is designed to store small values reliably. sakserv » hadoop-mini-clusters-zookeeper Hadoop Mini Clusters ZooKeeper Apache 2. ZooKeeper is a distributed co-ordination service to manage large set of hosts. Docker Kafka and ZooKeeper using Strimzi. The latest Tweets from TheZooKeeper (@ApacheZooKeeper). Run Apache Kafka and Apache ZooKeeper on OpenShift v3. Please consider adopting this package if you are interested in it. The zookeeper-server package contains the init. Finagle implements uniform client and server APIs for several protocols, and is designed for high performance and concurrency. Launch on more than just a Single VM using ZooKeeper Cluster. maxbuffer when attempting to read large zk "directories" GitHub Pull Request #683. Intended to be used by both servers in a common service and their clients. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Kubernetes ZooKeeper. This creates a new znode. Most of Finagle’s code is protocol agnostic, simplifying the implementation of new protocols. The canonical reference for building a production grade API with Spring. com/apache/zookeeper/pull/111/) was done directly on the generated document files instead of on the. ZooKeeper provides a reliable, centralized register of configuration data and services for distributed applications. The ZooKeeper component allows interaction with a ZooKeeper cluster and exposes the following features to Camel: Creation of nodes in any of the ZooKeeper create modes. In attempting to upgrade Solr's ZooKeeper dependency from 3. The difference is that it's decomposed into relatively independent subproblems, and it cleanly addresses all major pieces needed for practical systems. Directed by Niki Caro. service systemd script for zookeeper. Sign in Sign up # so that I can just do zookeeper start. Apache ZooKeeper is an effort to develop and maintain an open-source server which enables highly reliable distributed coordination. In this quickstart, you learn how to use Apache Phoenix in HDInsight. This is accomplished by running several Marathon instances that point to the same ZooKeeper quorum. After that, we will learn to write code to solve common distributed coordination tasks, as ZooKeeper's programming model. GitHub Pull Request #838. Features include (but are not necessarily limited to):. Configuration file has:. A Polymorphic Typing issue was discovered in FasterXML jackson-databind 2. Published on Feb 16, 2013. Setting Up and Running Apache Kafka on Windows OS In this article, we go through a step-by-step guide to installing and running Apache ZooKeeper and Apache Kafka on a Windows OS. ZOOKEEPER-1493 - C Client: zookeeper_process doesn't invoke completion callback if zookeeper_close has been called ZOOKEEPER-1494 - C client: socket leak after receive timeout in zookeeper_interest() ZOOKEEPER-1495 - ZK client hangs when using a function not available on the server. yaml provides a manifest that is close to production readiness. This creates a new znode. norazhao0728. ZooKeeper follows a simple client-server model where clients are nodes (i. GitHub Gist: instantly share code, notes, and snippets. Update 2019-07-23: @insumity explains that ZooKeeper sync+read is not, in fact, linearizable–there are conditions under which it might return stale reads. 256 Mb RAM if third-party components (SQL, NoSQL, Zookeeper, etc. I wanted to add how I fixed this problem / customized my environment. Docker Kafka and ZooKeeper using Strimzi. properties which will be used to store flink’s taskmanager. Use the parts you need. We have collection of more than 1 Million open source products ranging from Enterprise product to small libraries in all platforms. (In this example, three instances). ZooKeeper uses ACLs (Access Control List) to control access to its znodes (the data nodes of a ZooKeeper data tree). Package zookeeper provides a zookeeper registry. The new property zookeeper. , machines) that make use of the service, and servers are nodes that provide the service. hello - Simulates a backend server. com: sgroschupf: Johannes Zillmann: jzillmann: Erez Mazor: erezmazorgmail. x is also used in production. For security configuration settings, refer to the database official documentation. Apache Dubbo™ is a high-performance, java based open source RPC framework. cfg, the new version of the server tries to use the dataDir as the dataLogDir, and the dataLogDir as the dataDir. For general discussions and support questions, please use the python-zk mailing list hosted on Google Groups. Contribute to apache/zookeeper development by creating an account on GitHub. ZooKeeper for Microservice Registration and Discovery Learn how to use the service registration and discovery services in ZooKeeper to manage microservices when refactoring from an existing. https://github. Launch this Stack Bitnami ZooKeeper Stack for Google Cloud Platform. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. Setting Up and Running Apache Kafka on Windows OS In this article, we go through a step-by-step guide to installing and running Apache ZooKeeper and Apache Kafka on a Windows OS. Note that some features of GitHub Flavored Markdown are only available in the descriptions and comments of Issues and Pull Requests. ZooKeeper solves this issue with its simple architecture and API. 11, without editing zoo. Any write operation you perform will be done in a transaction against the ZooKeeper cluster. All gists Back to GitHub. Yeshvant has 5 jobs listed on their profile. Jump start your automation project with great content from the Ansible community. ZooKeeper servers keep their entire state machine in memory, and write every mutation to a durable WAL (Write Ahead Log) on storage media. GitHub is home to over 28 million developers working together to host and review code, manage projects, and build software together. Cloudera delivers an Enterprise Data Cloud for any data, anywhere, from the Edge to AI. Join GitHub today. apache zookeeper distributed coordination: Used By: 1,101 artifacts: Central (28) Cloudera (6) Cloudera Rel (120) Cloudera Libs (3) Hortonworks (1290) Mapr (3) Spring. A ZooKeeper client for C++. Configuration file has:. Kafka is a distributed streaming platform. Windows 7 and later systems should all now have certUtil:. However, when I began working for Netflix, I found a lot of interest in ZooKeeper but not a lot of experience. GitHub Gist: instantly share code, notes, and snippets. Co-ordinating and managing a service in a distributed environment is a complicated process. It requires Kubernetes 1. These nodes are automatically removed, when the instance stops or crashes. Check Zookeeper. Finagle implements uniform client and server APIs for several protocols, and is designed for high performance and concurrency. Requirement: We need to setup a zookeeper cluster on existing docker swarm. Package zookeeper provides a zookeeper registry. It provides 5 servers with a disruption budget of 1 planned disruption. 8 (SOLR-8724) I ran into test failures where attempts to create a node in a newly started standalone ZooKeeperServer were failing because of an assertion in MBeanRegistry. node-redis-failover - A redis failover solution based on ZooKeeper #opensource. Limitations. ZooKeeper is a distributed co-ordination service to manage large set of hosts. 2 Installing Kafka and Zookeeper is pretty easy. It is aimed primarily at developers hoping to try it out, and contains simple installation instructions for a single ZooKeeper server, a few commands to verify that it is running, and a simple. Apache ZooKeeper is a software project of the Apache Software Foundation, providing an open source distributed configuration service, synchronization service, and naming registry for large distributed systems. ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services. A value that is zero or negative indicates that no limit is enforced. This package has been orphaned. Note that there is a bug in Kerby that is not yet fixed in the 1. Bitnami ZooKeeper Stack Virtual Machines Bitnami Virtual Machines contain a minimal Linux operating system with ZooKeeper installed and configured. Read and write streams of data like a messaging system. In other words, if it cannot guarantee correct behaviour it will not respond to queries. Create a ZooKeeper ensemble This section describes the creation of a ZooKeeper ensemble with servers located on different hosts. An ensemble's membership can not be updated in a safe way in ZooKeeper 3. This project contains tools to facilitate the deployment of Apache ZooKeeper on Kubernetes using StatefulSets. Project maintained by rondinif Hosted on GitHub Pages — Theme by mattgraham. View on GitHub Download. jar - legacy jar file which contains all classes and source files. ZooKeeper follows a simple client-server model where clients are nodes (i. Question: When we create a replica of zookeeper in docker swarm, how can we provide unique ID for each replica. View on GitHub Spring Cloud Service Registration and Discovery - Spring Boot and Apache ZooKeeper This is a repository for Spring Boot Zookeeper Example. A simple Chef report handler to send notifications to Zookeeper about Chef runs. properties which will be used to store flink’s taskmanager. Bug 1181487 - zookeeper service fails to start. Bitnami ZooKeeper Stack Virtual Machines Bitnami Virtual Machines contain a minimal Linux operating system with ZooKeeper installed and configured. , machines) that make use of the service, and servers are nodes that provide the service. We aggregate information from all open source repositories. maxbuffer when attempting to read large zk "directories" GitHub Pull Request #683. It builds upon important stream processing concepts such as properly distinguishing between event time and processing time, windowing support, exactly-once processing semantics and simple yet efficient management of application state. 0: Tags: github hadoop zookeeper: Used By: 10 artifacts. x is also used in production. There are a few things you should be aware of regarding Heron and ZooKeeper: Heron uses ZooKeeper only for coordination, not for. It is aimed primarily at developers hoping to try it out, and contains simple installation instructions for a single ZooKeeper server, a few commands to verify that it is running, and a simple programming example. Bitnami ZooKeeper Stack Containers Deploying Bitnami applications as containers is the best way to get the most from your infrastructure. Skip to content. For better reliability and high availability of the Zookeeper service, we should set up Zookeeper in cluster mode. Apache Mahout(TM) is a distributed linear algebra framework and mathematically expressive Scala DSL designed to let mathematicians, statisticians, and data scientists quickly implement their own algorithms. 0-alpha experiences an error when trying to create a simple data node. You can run the following example to see how to add new data to ZooKeeper, recover it, and delete the created registries: Use the list command to see the data stored in the instance: $ ls / [zookeeper] Create a new directory (in this example, test directory which includes the string mydata) using the create / command. create、setData、delete等这些引起zookeeper节点变化的API会触发watcher process的执行。 服务端WatchManager,服务端的watcher对象管理器; 注册watcher时候,会在服务端调用FinalRequestProcessor. apache-zookeeper-[version]. Seems like we should just wait a few days based on what I'm seeing upstream? ----- This is an automated message from the Apache Git Service. some times i am the leader, most of the times i follow. The zookeeper-server package contains the init. This creates a new znode. An ensemble’s membership can not be updated in a safe way in ZooKeeper 3. Apache ZooKeeper is a software project of the Apache Software Foundation, providing an open source distributed configuration service, synchronization service, and naming registry for large distributed systems. We have collection of more than 1 Million open source products ranging from Enterprise product to small libraries in all platforms. Launching GitHub Desktop If nothing happens, download GitHub Desktop and try again. Heron relies on ZooKeeper for a wide variety of cluster coordination tasks. (masculino y femenino) Emoji images: https. Running a zookeeper and kafka cluster with Kubernetes on AWS is licensed by Sylvain Hellegouarch under a Attribution 3. AQS Algorithm B+Tree CentOS DirectIO KVM LRU LeetCode Linux Micro Service MutliThread MyBatis3 MySQL Netty SPI Spring Spring Cloud TreeMap WebSystem cache cpu dubbo http java javassist log4j mmap nio zookeeper 网络配置 虚拟化.