MongoDB Background and specifics ,
also I provide how to use Mongod Security .
and Basic MongoDB operation by pymongo
我這份文件有介紹MONGODB的特性及限制,Sharding 及 Replicate 的觀悠,Security怎麼作,怎麼用
my experience in spark tunning. All tests are made in production environment(600+ node hadoop cluster). The tunning result is useful for Spark SQL use case.
MongoDB Background and specifics ,
also I provide how to use Mongod Security .
and Basic MongoDB operation by pymongo
我這份文件有介紹MONGODB的特性及限制,Sharding 及 Replicate 的觀悠,Security怎麼作,怎麼用
my experience in spark tunning. All tests are made in production environment(600+ node hadoop cluster). The tunning result is useful for Spark SQL use case.
In der Präsentation wird auf die Unterschiede zwischen klassischen Webquests und Sprachenquests hingewiesen. Die Themen umfassen ein breites Spektrum von Traumhochzeit über Euro, Friedensnobelpreisträger, Deutsche Erfindungen bis zu Umweltthemen. Alle SprachenQuests wurden in der Schulpraxis ausprobiert und auf der Homepage der GI Krakau veröffentlicht.
Mesos-based Data Infrastructure @ DoubanZhong Bo Tian
How to build an elastic and efficient platform to support various Big Data and Machine Learning tasks is a challenge for a lot of corporations. In this presentation, Zhongbo Tian will give an overview of the Mesos-based core infrastructure of Douban, and demonstrate how to integrate the platform with state-of-art Big Data/ML technologies.
The Construction and Practice of Apache Pegasus in Offline and Online Scenari...acelyc1112009
A presentation in Apache Pegasus meetup in 2022 from Wei Wang.
Apache Pegasus is a horizontally scalable, strongly consistent and high-performance key-value store.
Know more about Pegasus https://pegasus.apache.org, https://github.com/apache/incubator-pegasus
13. 路由
• Hash
– Id % n
• 最普通的hash
• 如果id % 3 -> id % 4 总共会有80%的数据发生移动,
最好情况下是倍分 id % 3 -> id % 6 会有50%的数据发
生移动
• 但数据移动本身就是个要了亲命了。
14. 路由
• Hash
– 一致性hash
Def idmod = id % 1000 ;
If(id >= 0 and id < 250)
return db1;
Else if (id >= 250 and id < 500)
return db2;
Else if (id >= 500 and id < 750)
return db3;
Else
return db4;
一致性hash