ZooKepper学习入门

最新推荐文章于 2024-08-13 18:17:31 发布

wind19

最新推荐文章于 2024-08-13 18:17:31 发布

阅读量3.1k

点赞数

分类专栏：分布式存储、云计算

本文链接：https://blog.youkuaiyun.com/wind19/article/details/51671081

版权

分布式存储、云计算专栏收录该内容

7 篇文章

订阅专栏

本文介绍了ZooKeeper的学习入口，包括官方文档和中文翻译资源。深入探讨了ZooKeeper的应用场景，以及其三种模式和部署策略。同时提到了C语言编程接口的使用，以及运维中可能遇到的问题和解决方案。此外，还提及了ZooKeeper之外的其他分布式协调程序。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

应用场景

http://nileader.blog.51cto.com/1381108/1040007

http://www.ibm.com/developerworks/cn/opensource/os-cn-zookeeper/

http://jm.taobao.org/2011/10/08/1232/

ZooKeeper的三种模式和部署

ZooKeeper有单机、伪分布式和分布式三种部署模式

http://www.ibm.com/developerworks/cn/opensource/os-cn-zookeeper-code/index.html

http://www.blogjava.net/BucketLi/archive/2010/12/21/341268.html

http://www.ibm.com/developerworks/cn/data/library/bd-zookeeper/

以上都是安装入门讲解不错的文章

C语言编程

http://www.cnblogs.com/haippy/archive/2013/02/21/2919365.html

注意事项：

有两个库 zookeeper_st和zookeeper_mt，我们尽量都用zookeeper_mt，并且使用的时候加上-DTHREADED，zookeeper_st只支持异步api，并且需要自己处理事件和回调，以下是官方的说明

The package includes two shared libraries: zookeeper_st and zookeeper_mt. The former only provides the asynchronous APIs and callbacks for integrating into the application's event loop. The only reason this library exists is to support the platforms were a pthread library is not available or is unstable (i.e. FreeBSD 4.x). In all other cases, application developers should link with zookeeper_mt, as it includes support for both Sync and Async API.

In order to be able to use the ZooKeeper API in your application you have to remember to

Include ZooKeeper header: #include <zookeeper/zookeeper.h
If you are building a multithreaded client, compile with -DTHREADED compiler flag to enable the multi-threaded version of the library, and then link against against thezookeeper_mt library. If you are building a single-threaded client, do not compile with -DTHREADED, and be sure to link against the zookeeper_st library.

一些常量定义

# file type masks
ZOO_EPHEMERAL = 1
ZOO_SEQUENCE = 2
# session state
ZOO_EXPIRED_SESSION_STATE = -112
ZOO_AUTH_FAILED_STATE = -113
ZOO_CLOSED_STATE = 0
ZOO_CONNECTING_STATE = 1
ZOO_ASSOCIATING_STATE = 2
ZOO_CONNECTED_STATE = 3
# watch types
ZOO_CREATED_EVENT = 1
ZOO_DELETED_EVENT = 2
ZOO_CHANGED_EVENT = 3
ZOO_CHILD_EVENT = 4
ZOO_SESSION_EVENT = -1
ZOO_NOTWATCHING_EVENT = -2
# only used by the C extension
ZOO_LOG_LEVEL_ERROR = 1
ZOO_LOG_LEVEL_WARN = 2
ZOO_LOG_LEVEL_INFO = 3
ZOO_LOG_LEVEL_DEBUG = 4

# exceptions/errors
ZOK = 0
ZSYSTEMERROR = -1
ZRUNTIMEINCONSISTENCY = -2
ZDATAINCONSISTENCY = -3
ZCONNECTIONLOSS = -4
ZMARSHALLINGERROR = -5
ZUNIMPLEMENTED = -6
ZOPERATIONTIMEOUT = -7
ZBADARGUMENTS = -8
ZINVALIDSTATE = -9
# api errors
ZAPIERROR = -100
ZNONODE = -101
ZNOAUTH = -102
ZBADVERSION = -103
ZNOCHILDRENFOREPHEMERALS = -108
ZNODEEXISTS = -110
ZNOTEMPTY = -111
ZSESSIONEXPIRED = -112
ZINVALIDCALLBACK = -113
ZINVALIDACL = -114
ZAUTHFAILED = -115
ZCLOSING = -116
ZNOTHING = -117
ZSESSIONMOVED = -118