sizeofvoid.net sizeofvoid.net

sizeofvoid.net

sizeof(void) | Zhennan's technical notes and thoughts

Zhennan's technical notes and thoughts. Skip to primary content. Skip to secondary content. 2 并发与并行 (Concurrency and Parallelism). 请直接查看PDF: Cloudera Impala Introduction. Hadoop 2.0 NameNode HA和Federation实践. 天云趋势在2012年下半年开始为某大型国有银行的历史交易数据备份及查询提供基于Hadoop的技术解决方案,由于行业的特殊性,客户对服务的可用性有着非常高的要求,而HDFS长久以来都被单点故障的问题所困扰,直到Apache Hadoop在2012年5月发布了2.0的alpha版本,其中MRv2还很不成熟,可HDFS的新功能已经基本可用,尤其是其中的的High Availability(以下简称HA)和Federation。 Hadoop 2.0 NameNode HA和Federation实践. Proudly powered by WordPress.

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sizeof(void) | Zhennan's technical notes and thoughts | sizeofvoid.net Reviews

https://sizeofvoid.net

Zhennan's technical notes and thoughts. Skip to primary content. Skip to secondary content. 2 并发与并行 (Concurrency and Parallelism). 请直接查看PDF: Cloudera Impala Introduction. Hadoop 2.0 NameNode HA和Federation实践. 天云趋势在2012年下半年开始为某大型国有银行的历史交易数据备份及查询提供基于Hadoop的技术解决方案,由于行业的特殊性,客户对服务的可用性有着非常高的要求,而HDFS长久以来都被单点故障的问题所困扰,直到Apache Hadoop在2012年5月发布了2.0的alpha版本,其中MRv2还很不成熟,可HDFS的新功能已经基本可用,尤其是其中的的High Availability(以下简称HA)和Federation。 Hadoop 2.0 NameNode HA和Federation实践. Proudly powered by WordPress.

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sizeofvoid.net sizeofvoid.net
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再认识Google F1和Spanner | sizeof(void)

http://www.sizeofvoid.net/再认识google-f1和spanner

Zhennan's technical notes and thoughts. Skip to primary content. 1) 除了树状主键外,数据本身是Protocol Buffer格式的,直接作为key-value store的value存放到Spanner里。 2) PB格式的模型和传统关系型的数据模型很不一样,其field可以为略去可以重复,所以,某些从前要另外建表的场景,在PB里可能就直接全部存一起了,譬如customer { id, name, item[*] { iid, price[? 3) 他们自己也承认,基于这样的数据模型来实现的SQL,只是看着眼熟而已,如果真像传统SQL那么用,一些隐含的JOIN操作或遍历请求会使性能非常糟糕,但他们是Google,他们可以说这是ORM本身的问题 (“These hurt performance in all databases. They are disastrous on F1”),所以目前他们自己用的F1客户端的库也限定了使用者不能使用join,所有数据都必须显式地读取。 This entry was posted in BigData.

2

BigData | sizeof(void)

http://www.sizeofvoid.net/category/bigdata

Zhennan's technical notes and thoughts. Skip to primary content. Skip to secondary content. 请直接查看PDF: Cloudera Impala Introduction. Google在前几天发布了一篇提交给OSDI’12的论文, Spanner: Google’s Globally-Distributed Database ,微博上讨论非常热烈,但真正去看完论文以后,比较失望. Hadoop 2.0 NameNode HA和Federation实践. On Hadoop 2.0 NameNode HA和Federation实践. On Hadoop 2.0 NameNode HA和Federation实践. Proudly powered by WordPress.

3

March | 2013 | sizeof(void)

http://www.sizeofvoid.net/2013/03

Zhennan's technical notes and thoughts. Skip to primary content. Skip to secondary content. Monthly Archives: March 2013. Hadoop 2.0 NameNode HA和Federation实践. 12304;激安市場】そっくり食品サンプル 携帯ストラップ (かき氷/宇治金時) 【. On Hadoop 2.0 NameNode HA和Federation实践. 12493;ックレス K10WG*ホワイトゴールド 煌めくスリーストーン 0.3ctブラウンダイヤ. On Hadoop 2.0 NameNode HA和Federation实践. Proudly powered by WordPress.

4

goroutine背后的系统知识 | sizeof(void)

http://www.sizeofvoid.net/goroutine-under-the-hood

Zhennan's technical notes and thoughts. Skip to primary content. 2 并发与并行 (Concurrency and Parallelism). 系统调用都提供什么功能呢 用操作系统的名字加上对应的中断编号到谷歌上一查就可以得到完整的列表 ( Windows. 如果超出此协议的功能无法自己实现,那我们就说该操作系统不支持该功能,举个例子,Linux在2.6之前是不支持多线程的,无论如何在程序里模拟,我们都无法做出多个可以同时运行的并符合POSIX 1003.1c语义标准的调度单元。 可是,我们写程序并不需要去调用中断或是SYSCALL指令,这是因为操作系统提供了一层封装,在Windows上,它是NTDLL.DLL,也就是常说的Native API,我们不但不需要去直接调用INT 2E或SYSCALL,准确的说,我们不能直接去调用INT 2E或SYSCALL,因为Windows并没有公开其调用规范,直接使用INT 2E或SYSCALL无法保证未来的兼容性。 2 并发与并行 (Concurrency and Parallelism). 2) 多核...

5

About | sizeof(void)

http://www.sizeofvoid.net/about-me

Zhennan's technical notes and thoughts. Skip to primary content. Leave a Reply Cancel reply. Your email address will not be published. Proudly powered by WordPress.

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Hadoop Resources - 数学吴老师

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Hadoop各个版本下载页面 https:/ archive.apache.org/dist/hadoop/common/. 各个版本的jdk下载目录 http:/ www.oracle.com/technetwork/java/javase/archive-139210.html. HBase官方参考资料 http:/ hbase.apache.org/book.html. HBase官方API操作查询 http:/ hbase.apache.org/apidocs/index.html. 一个关于hadoop的外国个人博客 http:/ www.michael-noll.com/blog/archives/. Storm创始人Nathan Marz的个人博客 http:/ nathanmarz.com/. Http:/ blog.fens.me/hadoop-family-roadmap/. Http:/ blog.jobbole.com/tag/hadoop/. Introducing Apache Hadoop YARN. Apache Hadoop YARN ResourceManager.

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sizeof(void) | Zhennan's technical notes and thoughts

Zhennan's technical notes and thoughts. Skip to primary content. Skip to secondary content. 2 并发与并行 (Concurrency and Parallelism). 请直接查看PDF: Cloudera Impala Introduction. Hadoop 2.0 NameNode HA和Federation实践. 天云趋势在2012年下半年开始为某大型国有银行的历史交易数据备份及查询提供基于Hadoop的技术解决方案,由于行业的特殊性,客户对服务的可用性有着非常高的要求,而HDFS长久以来都被单点故障的问题所困扰,直到Apache Hadoop在2012年5月发布了2.0的alpha版本,其中MRv2还很不成熟,可HDFS的新功能已经基本可用,尤其是其中的的High Availability(以下简称HA)和Federation。 Hadoop 2.0 NameNode HA和Federation实践. Proudly powered by WordPress.

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