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分割å¯èƒ½ãªLZO圧縮をhadoopã§ä½¿ã†
Twitterã§ã¯åŸºæœ¬çš„ã«ãƒ•ã‚¡ã‚¤ãƒ«ã¯LZO圧縮ã—ã¦ã„るよã†ã§ï¼Œ 3,4å€ã®ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸ã®ç¯€ç´„ 分割å¯èƒ½ CPUã¯å°‘ã—ã—ã‹ä½¿ã‚ãªã„ IOãƒã‚¦ãƒ³ãƒ‰ã®ã‚¸ãƒ§ãƒ–ã¯3,4å€ã®æ€§èƒ½å‘上 ãªã©ã®ãƒ¡ãƒªãƒƒãƒˆãŒã‚ã‚‹ã¨è¨€ã£ã¦ã„ã¾ã™ï¼Žã“ã‚Œã¯ä½¿ã‚ãªã„手ã¯ãªã„ã¨ã„ã†ã“ã¨ã§è©¦ã—ã¦ã¿ã¾ã—ãŸï¼Ž clouderaã®ã“ã®ãƒ–ãƒã‚°è¨˜äº‹ã‚’å‚考ã«ã—ã¦é€²ã‚ã¾ã™ï¼Ž code.google.com/p/hadoop-gpl-compressionã‚‚ã‚ã‚Šã¾ã™ãŒï¼ŒTwitterãŒå…¬é–‹ã—ã¦ã„る分割å¯èƒ½ãªã®ã‚’使ã„ã¾ã™ï¼Ž http://github.com/kevinweil/hadoop-lzo 今回ã®ç’°å¢ƒã¯clouderaã®amiをベースã«ã—ã¾ã—ãŸï¼Ž cloudera-ec2-hadoop-images/cloudera-hadoop-fedora-20090623-x86_64 ami-2359bf4 CDH3ã§ï¼Œhadopoã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã¯
Cloudera Blog
In an era where artificial intelligence (AI) is reshaping enterprises across the globe—be it in healthcare, finance, or manufacturing—it’s hard to overstate the transformation that AI has had on businesses, regardless of industry or size. At Cloudera, we recognize the urgent need for bold steps to harness this potential and dramatically accelerate the time to […] Read blog post
[HDFS-265] Revisit append - ASF JIRA
HADOOP-1700 and related issues have put a lot of efforts to provide the first implementation of append. However, append is such a complex feature. It turns out that there are issues that were initially seemed trivial but needs a careful design. This jira revisits append, aiming for a design and implementation supporting a semantics that are acceptable to its users.
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USENIX | The Advanced Computing Systems Association
;login: Enters a New Phase of Its Evolution For over 20 years, ;login: has been a print magazine with a digital version; in the two decades previous, it was USENIX’s newsletter, UNIX News. Since its inception 45 years ago, it has served as a medium through which the USENIX community learns about useful tools, research, and events from one another. Beginning in 2021, ;login: will no longer be the f
Cloudera Blog
It’s hard to believe it’s been 15 years since the global financial crisis of 2007/2008. While this might be a blast from the past we’d rather leave in the proverbial rear-view mirror, in March of 2023 we were back to the future with the collapse of Silicon Valley Bank (SVB), the largest US bank to […] Read blog post
HDFS ã®ä¿¡é ¼æ€§ï¼ˆåŽŸé¡Œï¼šHDFS Reliability） ‎(Pac Learner)‎
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Hadoop Archive: File Compaction for HDFS · Yahoo! Hadoop Blog
Thanks to Tsz-Wo Nicholas Sze and Mahadev Konar for this article. The Problem of Many Small Files The Hadoop Distributed File System (HDFS) is designed to store and process large (terabytes) data sets. At Yahoo!, for example, a large production cluster may have 14 PB disk spaces and store 60 millions of files. However, storing a large number of small files in HDFS is inefficient. We call a file sm
Scalability of the Hadoop Distributed File System · Yahoo! Hadoop Blog
The bottom line is that we achieved the target in Petabytes and got close to the target in the number of files. But this is done with a smaller number of nodes and the need to support a workload close to 100,000 clients has not yet materialized. The question now is whether the goals are feasible with the current system architecture. Namespace Limitations HDFS is based on an architecture where the
Sawzall and the PIG – Port twenty two
When I heard interesting uses cases of how “Sawzall� is used to hack huge amounts of log data within Google I was thinking about two things. Apache PIG, which is “a platform for analyzing large data sets that consists of a high-level language for expressing data analysis programs, coupled with infrastructure for evaluating these programs. The salient property of Pig programs is that their st
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Rapid prototyping with solr – Port twenty two
[HDFS-385] Design a pluggable interface to place replicas of blocks in HDFS - ASF JIRA
http://borthakur.com/ftp/hadoopmicrosoft.pdf
HDFS block replica placement in your hands now!
JLESC — Joint Laboratory on Extreme Scale Computing
http://agilecatcloud.com/2010/06/24/hdfs-%E3%81%AE%E3%82%B9%E3%82%B1%E3%83%BC%E3%83%A9%E3%83%93%E3%83%AA%E3%83%86%E3%82%A3%E3%82%92%E8%80%83%E5%AF%9F%E3%81%99%E3%82%8B-_3-cloud-cloudcomputing-hadoop-hdfs/
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