topic links

------vector clock

A vector clock event synchronization strategy
will likely be introduced in a future version
of Cassandra.
--《Cassandra The Definitive Guide》

why vector clocks are easy:
http://blog.basho.com/2010/01/29/why-vector-clocks-are-easy/

why vector clocks are hard
http://blog.basho.com/2010/04/05/why-vector-clocks-are-hard/

vector clocks again:
http://pl.atyp.us/wordpress/?p=2830

Conflict Resolution
http://pl.atyp.us/wordpress/?p=2601

------yaml

yaml process:
http://code.google.com/p/snakeyaml/wiki/Documentation

PART TWO:

0.使用配置管理工具对集群环境各节点的配置文件进行管理
如使用puppet?
Puppet的三层结构:
Configuration language
Transactional Layer
Resource Abstraction Layer

1.如果在seed节点启动前,将自己的IP加入节点seed列表中,可能出现的问题?

2.考虑使用rsync传输备份文件的效率
rsync是类unix系统下的数据镜像备份工具,从软件的命名上就可以看出来了——remote sync。
http://baike.baidu.com/view/1183189.htm
之前涉及的备份方案直接使用系统copy命令之cp,可以对比一下与使用rsync或者ftp的效果(同时都用crontab配置定时任务)。

3.Fail-Fast机制
·在系统发生错误后,立即作出响应,阻止错误继续发生。

4.Using the xxd command to decode hex values:
echo 4767616e7473 |xxd -r -p

[@more@]

来自 “ ITPUB博客 ” ,链接:http://blog.itpub.net/23937368/viewspace-1054130/,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-1054130/

colcon build --packages-select example_topic_rclpy --event-handlers console_direct+ --cmake-args -DCMAKE_VERBOSE_MAKEFILE=ON Starting >>> example_topic_rclpy running egg_info writing ../../build/example_topic_rclpy/example_topic_rclpy.egg-info/PKG-INFO writing dependency_links to ../../build/example_topic_rclpy/example_topic_rclpy.egg-info/dependency_links.txt writing entry points to ../../build/example_topic_rclpy/example_topic_rclpy.egg-info/entry_points.txt writing requirements to ../../build/example_topic_rclpy/example_topic_rclpy.egg-info/requires.txt writing top-level names to ../../build/example_topic_rclpy/example_topic_rclpy.egg-info/top_level.txt reading manifest file '../../build/example_topic_rclpy/example_topic_rclpy.egg-info/SOURCES.txt' writing manifest file '../../build/example_topic_rclpy/example_topic_rclpy.egg-info/SOURCES.txt' running build running build_py running install running install_lib running install_data running install_egg_info removing '/home/syf/dev_ws/install/example_topic_rclpy/lib/python3.10/site-packages/example_topic_rclpy-0.0.0-py3.10.egg-info' (and everything under it) Copying ../../build/example_topic_rclpy/example_topic_rclpy.egg-info to /home/syf/dev_ws/install/example_topic_rclpy/lib/python3.10/site-packages/example_topic_rclpy-0.0.0-py3.10.egg-info running install_scripts Installing see_choice script to /home/syf/dev_ws/install/example_topic_rclpy/lib/example_topic_rclpy writing list of installed files to '/home/syf/dev_ws/build/example_topic_rclpy/install.log' Finished <<< example_topic_rclpy [0.74s] Summary: 1 package finished [0.98s]
05-14
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