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  • <div><p>Create a separate file , voldemort-env.sh , present in config directory by default, that can be overridden by applications to suit the local environment. <p>Eg: - JAVA_HOME -> to point to...
  • <div><ul><li>Exact version on all dependencies (based on lib/jars)</li></ul> <p>Allows installation of voldemort jar in local repo, setup eclipse, etc.</p><p>该提问来源于...voldemort/voldemort</p></div>
  • Voldemort Replacer-crx插件

    2021-03-12 17:54:05
    这个扩展用三个随机值之一代替网站中的Voldemort。 用“您不知道的人”,“他不愿透露姓名的人”或“黑暗之王”的随机选择替换伏地魔或伏地魔勋爵(包括所有格选项)。 支持语言:English (United States)
  • <p>I need to do benchmarking for Voldemort for university. I configured a cluster on 3 openstack instances (hosted at the University). The problem is each instance has 1GB RAM memory and I did the ...
  • Voldemort博客

    2014-08-13 14:34:08
    Voldemort -- 分布式 key-value 存储系统

    Voldemort是一个分布式键-值(Key-value)存储系统,是Amazon's Dynamo的一个开源克隆。
    1.支持自动复制数据到多个服务器上。
    2.支持数据自动分割所以每个服务器只包含总数据的一个子集。
    3.提供服务器故障透明处理功能。
    4.支持可拨插的序化支持,以实现复杂的键-值存储,它能够很好的5.集成常用的序化框架如:Protocol Buffers、Thrift、Avro和Java Serialization。
    6.数据项都被标识版本能够在发生故障时尽量保持数据的完整性而不会影响系统的可用性。
    7.每个节点相互独立,互不影响。
    8.支持可插拔的数据放置策略。

    该项目主页:http://project-voldemort.com/

    Voldemort — 分布式 key-value 存储系统

    voldemort 学习

    Voldemort -- 分布式 key-value 存储系统

    project voldemort

    a distributed database

    https://github.com/voldemort/voldemort/issues

    LinkedIn数据基础设施简介

    NoSQL databases Voldemort db

    https://github.com/search?utf8=%E2%9C%93&q=voldermort&ref=cmdform


    展开全文
  • <div><p>Voldemort is a NoSQL data store from LinkedIn.</p><p>该提问来源于开源项目:hawtio/hawtio</p></div>
  • <div><p>This patch improves the debugging messages introduced by commit fa3d6f6ff2189a0860ae98535a84cdc5372b168b in two ways: 1.) Print out hex representation of keys and ...voldemort/voldemort</p></div>
  • <div><p>1) 'gradle jar' will build binaries that are equivalent to 'ant release' 2) only 'ant release' task is ported to gradle....voldemort/voldemort</p></div>
  • <div><p>Each contrib directory now becomes a separate project (although the no new build.gradle files have been created). This makes the import into Intellij better as it ...voldemort/voldemort</p></div>
  • m trying to write a program that uses Voldemort as a dependency. For that purpose I have packaged Voldemort as a Maven module, uploaded it to a private repository, and included it in the project's...
  • <div><p>[root voldemort-0.96]# bin/voldemort-server.sh config/single_node_cluster [2013-01-09 19:02:35,296 voldemort.store.metadata.MetadataStore] INFO metadata init(). [2013-01-09 19:02:35,412 ...
  • <div><p>Added code so that the Voldemort server automatically cleans the shared High Availability state from HDFS when appropriate. <p>Currently, this new code runs when: 1. An old Read-Only store-...
  • Newui voldemort

    2020-12-26 17:59:52
    <div><p>该提问来源于开源项目:TerriaJS/terriajs</p></div>
  • voldemort,亚马逊发电机的开源克隆。.zip概述
  • <div><p>Hi I have been working on a scala shell that integrates with the project.The patches making up the shell are attached along. <p>The details regarding the shell are...voldemort/voldemort</p></div>
  • <div><p>该提问来源于开源项目:voldemort/voldemort</p></div>
  • <div><p>markdown sucks. I can't type a single thing here. I enjoyed software development until github. See issue 108.</p><p>该提问来源于开源项目:voldemort/voldemort</p></div>
  • <div><p>The following line in file src/java/voldemort/routing/ConsistentRoutingStrategy.java, method routeRequest can cause an ArrayIndexOutOfBoundsException. public List routeRequest(byte[] key) { ...
  • Voldemort的RoutedStore

    2012-09-05 15:05:06
    RoutedStore是Voldemort客户端的一个重要组件,他的职责是将数据操作路由到不同的节点上。RoutedStore内部维护了与节点通信的客户端列表,这些客户端是Store的实现类,可以是SocketStore或HttpStore。对于每一个节点...

     

     

    RoutedStore是Voldemort客户端的一个重要组件,他的职责是将数据操作路由到不同的节点上。RoutedStore内部维护了与节点通信的客户端列表,这些客户端是Store的实现类,可以是SocketStore或HttpStore。对于每一个节点,RoutedStore会建立请求,发送数据,等待响应,验证响应结果是否正确,执行一些记录的动作,除此之外,RoutedStore还有一些恢复的逻辑。

     

    在使用RoutedStore之前,Voldemort使用的是ThreadPoolStore,但是ThreadPoolStore有两个重要的缺陷:

     

    1. 逻辑非常复杂。

    2. 如果某个节点的响应比较慢,会耗尽线程池里的线程。

     

    RoutedStore采用状态机和管道的机制将各种业务操作进行分离,降低了实现的复杂度。同时,RoutedStore采用NIO模式,也避免了线程耗尽的问题。

     

    Action

     

    Action定义了在管道中的粒子逻辑。当Pipeline接收到一个Event时,某个Action的execute方法会被调用。逻辑的粒度没有一个很明确的标准,当然,可以用直觉的逻辑来定义Action的边界。下图是实现Action的类列表:

     

     

    通过Pipeline.addEventAction(Event, Action)方法,可以将某个Action映射到某个事件上。当Pipeline接收到该事件,与该事件对应的Action会被执行。

     

    Pipeline

     

    Pipeline是Action执行的通道,Pipeline内部维护了一个Event队列,Pipeline会顺序读取该队列的Event,执行该Event对应的Action。addEventAction(Event, Action)接口提供注册Event以及对应的Action的功能。如果需要增加一个需要处理的Event,可以调用addEvent(Event)。

     

    每一个Pipeline都只归属一种操作类型,操作类型有:GET, GET_ALL, GET_VERSIONS, PUT, DELETE。在Pipeline的构造方法中必须要指定某种操作类型。

     

    Event

     

    Event是一个枚举类型,有下面几种:

     

    STARTED

    CONFIGURED

    COMPLETED

    INSUFFICIENT_SUCCESSES

    INSUFFICIENT_ZONES

    RESPONSES_RECEIVED

    ERROR

    MASTER_DETERMINDED

    ABORTED

    HADOFF_FINISHED

     

     

     

    展开全文
  • <div><p>In order to enable and disable SSL support in Voldemort node. Add 3 properties in configuration and replace source file url before fetching if needed.</p><p>该提问来源于开源项目:...
  • cassandra vs. voldemort

    2011-06-27 23:05:19
    Apache Cassandra • Project Voldemort • Apache Cassandra • Project Voldemort • StandardDescriptionSecond Generation...
    Apache Cassandra Project Voldemort
    Apache Cassandra Project Voldemort
    Standard
    DescriptionSecond Generation Distributed Database ?
    Websitecassandra.apache.org project-voldemort.com
    LicenseApache License Apache License
    Features
    Query languageAPI calls API calls
    Database modelColumn-oriented Key-value
    Map and reduce
    yes
    no
    Unicodeyes yes
    Full text searchno no
    Intigrity
    Integrity modelBASE MVCC
    Atomicity
    yes
    no
    Consistencyyes yes
    Isolationno no
    Durabilityyes yes
    Transactionsno no
    Referential integrityno no
    Revision control? yes
    Distribution
    Horizontal scalableyes yes
    Replicationyes yes
    Shardingyes yes
    System requirements
    Operating systemCross-platform Linux, Mac OS X, Windows
    Architecture
    Programming languageJava Java
    More
    NameCassandra Project Voldemort
    Full nameApache Cassandra ?
    CategoryDatabase Database
    BrandApache ?
    [@more@]

    来自 “ ITPUB博客 ” ,链接:http://blog.itpub.net/23937368/viewspace-1051688/,如需转载,请注明出处,否则将追究法律责任。

    转载于:http://blog.itpub.net/23937368/viewspace-1051688/

    展开全文
  • Voldemort 是一个采用 Java 语言开发的分布式的Key-Value存储系统。 Voldemort is a distributed key-value storage system   主要特性: 1)Data is automatically replicated over multiple servers. 2)Data ...

    Voldemort 是一个采用 Java 语言开发的分布式的Key-Value存储系统。

    Voldemort is a distributed key-value storage system



     
     

    主要特性:

    1)Data is automatically replicated over multiple servers.

    2)Data is automatically partitioned so each server contains only a subset of the total data

    3)Server failure is handled transparently

    4)Pluggable serialization is supported to allow rich keys and values including lists and tuples with named fields, as well as to integrate with common serialization frameworks like Protocol Buffers, Thrift, and Java Serialization

    5)Data items are versioned to maximize data integrity in failure scenarios without compromising availability of the system

    6)Each node is independent of other nodes with no central point of failure or coordination

    7)Good single node performance: you can expect 10-20k operations per second depending on the machines, the network, and the replication factor

    8)Support for pluggable data placement strategies to support things like distribution across data centers that are geographical far apart.

     

    缓存数据可以自动在各个服务器节点之间同步复制。

    每一个服务器的缓存数据被横向分割,因此是总缓存的一个子集。

    严格保持缓存的一致性。

    提供服务器宕机快速恢复方案。

    可配置的数据存储引擎。

    可配置的数据序列化方式。

    每一个数据项都有版本标识,用来保证数据的完整性和可用性。

    每一个缓存节点都是独立的,因此任何一个节点的故障都不会影响系统的正常运行。

     

     

    Comparison to relational databases

     

    Voldemort is not a relational database, it does not attempt to satisfy arbitrary relations while satisfying ACID properties. Nor is it an object database that attempts to transparently map object reference graphs. Nor does it introduce a new abstraction such as document-orientation. It is basically just a big, distributed, persistent, fault-tolerant hash table. For applications that can use an O/R mapper like active-record or hibernate this will provide horizontal scalability and much higher availability but at great loss of convenience. For large applications under internet-type scalability pressure, a system may likely consist of a number of functionally partitioned services or APIs, which may manage storage resources across multiple data centers using storage systems which may themselves be horizontally partitioned. For applications in this space, arbitrary in-database joins are already impossible since all the data is not available in any single database. A typical pattern is to introduce a caching layer which will require hashtable semantics anyway. For these applications Voldemort offers a number of advantages:

    1)Voldemort combines in memory caching with the storage system so that a separate caching tier is not required (instead the storage system itself is just fast)

    2)Unlike MySQL replication, both reads and writes scale horizontally

    3)Data portioning is transparent, and allows for cluster expansion without rebalancing all data

    4)Data replication and placement is decided by a simple API to be able to accommodate a wide range of application specific strategies

    5)The storage layer is completely mockable so development and unit testing can be done against a throw-away in-memory storage system without needing a real cluster (or even a real storage system) for simple testing

     

    原创不易,欢迎打赏,请认准正确地址,谨防假冒



     

     


    展开全文
  • Voldemort是一款基于Java开发的分布式键-值缓存系统,像JBoss Cache一样,Voldemort同样支持多台服务器之间的缓存同步,以增强系统的可靠性和读取性能。Voldemort的特点缓存数据可以自动在各个服务器节点之间同步...
  • copy a voldemort tools

    2011-06-23 23:55:41
    a tools class to find objects in voldemort and massive operations. Bye package com.components.repository; import ...
  • Voldemort的client维护了与各个节点通信的链接。节点的状态是不断变化的,随时都有可能某个或某些节点访问不同或是崩溃的情况,而这些情况的出现都会对客户端的get, put, delete操作产生影响。所以,节点状态的监控...
  • [CF855G]Harry Vs Voldemort

    2019-05-22 09:34:00
    [CF855G]Harry Vs Voldemort 题目大意: 一棵\(n(n\le10^5)\)个结点的树,\(q(q\le10^5)\)次操作,每次增加一条新边。每次操作后,你需要统计形如\((u,v,w)\)的三元组的数量,使得\(u,v,w\)都不相同,并存在两条分别...
  • <p>I am getting the following exception occasionally at voldemort.client.StoreClient.put(K, V). I never saw this with voldemort 1.2.1. Is this a bug? <p>java.lang.IllegalArgumentException: requestTime...
  • voldemort单节点安装非常简单:-#下载tar包,解包-#修改/etc/profile添加VOLDEMORT_HOME变量-#bin/voldemort-server.sh config/single_node_clust...
  • linkedin解封 9月29日, LinkedIn Signal... 本文旨在就这种规模的Scala,JRuby和Voldemort的组合的动机和技术挑战提供更多见解。 LinkedIn搜索架构师John Wang发布了整个系统的架构概述 : Scalatra后端是在S...
  • LePen2Voldemort-crx插件

    2021-03-14 18:47:33
    种族主义者,这些人的可恶和丑陋都是一样的。神秘人的名字将不会再显示与此扩展名。 支持语言:Français

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