Cassandraメモ(Hishidama's Apache Cassandra Memo)
Cassandra(カサンドラ)ã¯ã€Amazonã®Dynamoã¨Googleã®BigTableã‚’å…ƒã«ã—ãŸã‚ªãƒ¼ãƒ—ンソースã®åˆ—指å‘分散データベース。（リレーショナルデータベース（RDB）ã§ã¯ãªã„） Javaã§ä½œã‚‰ã‚Œã¦ã„ã‚‹ãŒã€Thriftベースãªã®ã§ä»–ã®è¨€èªžã‹ã‚‰ã‚‚アクセスã—ã‚„ã™ã„らã—ã„。 Dynamoã®åˆ†æ•£ã‚·ã‚¹ãƒ†ãƒ è¨è¨ˆã¨BigTableã®ãƒ‡ãƒ¼ã‚¿ãƒ¢ãƒ‡ãƒ«ï¼ˆColumnFamily）をå‚考ã«ã—ã¦ãŠã‚Šã€å˜ãªã‚‹key/valueストアより高機能らã—ã„。
Cassandra: RandomPartitioner vs OrderPreservingPartitioner
Occasionally useful posts about RIAs, Web scale computing & miscellanea When building a Cassandra cluster, the “key†question (sorry, that’s weak) is whether to use the RandomPartitioner (RP), or the OrderPreservingPartitioner (OPP). These control how your data is distributed over your nodes. Once you have chosen your partitioner, you cannot change without wiping your data, so think carefully! For
A Quick Introduction to the Cassandra Data Model
Further reading: for an in-depth introduction see Understanding the Cassandra Data Model at datastax.com For newcomers Cassandra data model is a mess. Even experienced database developers spend quite a bit of time learning it. There are great articles on the Web that explain the model. Read WTF is a SuperColumn? An Intro to the Cassandra Data Model and my favorite one – Installing and using Apache
Do You Really Need SQL to Do It All in Cassandra?
NoSQL database systems are designed for scalability. The down side of that is a primitive key-value data model and, as the name suggest, no support for SQL. It might sound like a serious limitation – how can I “selectâ€, “joinâ€, “group†and “sort†the data? This post explains how all these operations can be quite naturally and efficiently implemented in one of the most famous NoSQL system – Cassand
What’s new in Cassandra 0.7: Secondary indexes | Datastax
Deprecation warning This post covers the obsolete Cassandra 0.7. Modern Cassandra manipulates indexes using CQL. Overview In Cassandra, indexes on column values are called "secondary indexes," to distinguish them from the index on the row key that all ColumnFamilies have. Secondary indexes allow querying by value and can be built in the background automatically without blocking reads or writes. Th
WTF is a SuperColumn? An Intro to the Cassandra Data Model — Arin Sarkissian
For the last month or two the Digg engineering team has spent quite a bit of time looking into, playing with and finally deploying Cassandra in production. It’s been a super fun project to take on – but even before the fun began we had to spend quite a bit of time figuring out Cassandra’s data model… the phrase “WTF is a ’super column’†was uttered quite a few times. If you’re coming from an RDBM
DataModel_JP - Cassandra Wiki
イントãƒãƒ€ã‚¯ã‚·ãƒ§ãƒ³ Cassandraã¯4次元ã¾ãŸã¯5次元ãƒãƒƒã‚·ãƒ¥ãªãƒ‡ãƒ¼ã‚¿ãƒ¢ãƒ‡ãƒ«ã‚’æŒã£ã¦ã„ã¾ã™ã€‚ 基本コンセプトã¨ã—ã¦ã¯: Cluster: è«–ç†çš„ãªCassandraインスタンスã®äº‹ã€‚クラスタã¯è¤‡æ•°ã®ã‚ースペースをæŒã¤ã“ã¨ãŒå‡ºæ¥ã‚‹ã€‚ Keyspace: ColumnFamilies用ã®ãƒãƒ¼ãƒ スペース。一般的ã«ã¯1アプリケーションã«1ã‚ースペース。 ColumnFamilyã¯è¤‡æ•°ã®ã‚«ãƒ©ãƒ (カラムã¯åå‰ã€å€¤ã€ã‚¿ã‚¤ãƒ スタンプをæŒã¤)ã‚’æŒã¡ã€è¡Œã‚ーã§å‚ç…§å¯èƒ½ã€‚ SuperColumns㯠サブカラムをæŒã¤ã‚«ãƒ©ãƒ ã®ã“ã¨ã€‚ ã¾ãšã¯ãƒœãƒˆãƒ アップã§ä¸€ç•ªå°ã•ã„粒度ã®ãƒ‡ãƒ¼ã‚¿æ§‹é€ ã§ã‚るカラムã‹ã‚‰é †ã«ã¿ã¦ã„ãã¾ã—ょã†ã€‚ カラムカラムã¯Cassandraã«ãŠã‘る最å°é™ã®ãƒ‡ãƒ¼ã‚¿æ§‹é€ ã§ã™ã€‚ãã®å®Ÿä½“ã¯ã‚¿ãƒ—ル(triplet)ã§ã€åå‰ã€å€¤ã€ã‚¿ã‚¤ãƒ スタンプをæŒã¡ã¾ã™ã€‚ Thriftインタフェースã®ã‚«ãƒ©ãƒ ã®å®šç¾©ã¯ä»¥ä¸‹ã®ã‚ˆã†
Cassandraã®ã¯ã˜ã‚方─手を動ã‹ã—ã¦NoSQLを体感ã—よㆠ記事一覧 | gihyo.jp
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インフラエンジニアã®ãŸã‚ã®cassandra入門
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Cassandra入門ã¨ã€ã•ã‚‰ã«è©³ã—ã知るãŸã‚ã®ãƒªã‚½ãƒ¼ã‚¹é›†
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Cassandra Status Inside Facebook, Twitter, Digg, and More
As everyone probably knows by now, Cassandra was originated at Facebook as a solution for inbox search and then open sourced under the ASF umbrella and an Apache license. Since then, Twitter, Digg, Reddit and quite a few others started using it, but not much have been heard from Facebook. So, in case you are wondering ☞ what’s up with Cassandra here’s a very concise update: Twitter and Digg are no
インフラエンジニアã®ãŸã‚ã®cassandra入門
@marqsã•ã‚“ã¨@muranetã•ã‚“ã¨ä¸€ç·’ã«hbstudy#11ã§ç™ºè¡¨ã•ã›ã¦ã„ãŸã ãã¾ã—ãŸã€‚ ã“れを機ã«ã¨ã‹è¨€ã†ã¨ã§ã‹ã™ãŽã‚‹æ°—ãŒã—ã¾ã™ãŒCassandraãŒå›½å†…ã§ã‚‚盛り上ãŒã‚‹ã¨ã„ã„ãªãƒ¼ã¨æ€ã„ã¾ã™ã€‚ 懇親会ã§ã‚‚çµæ§‹ä½¿ãŠã†ã¨ã—ã¦ã„ã‚‹æ–¹ãŒã„ãŸã‚Šã—ã¦ã†ã¡ã‚‚ã†ã‹ã†ã‹ã—ã¦ã‚‰ã‚Œãªã„ã§ã™ãï½— 資料をã‚ã’ã¾ã—ãŸã®ã§ã“ã¡ã‚‰ã‚ˆã‚ã—ã‹ã£ãŸã‚‰ã©ã†ãžï¼ インフラエンジニアã®ãŸã‚ã®cassandra入門 View more presentations from Akihiro Kuwano. ã“ã‚Œã ã‘ã¯ã‹ã‹ãªã„ã¨ï¼ ç´ æ™´ã‚‰ã—ã„会を開ã„ã¦ä¸‹ã•ã£ã¦ã„ã‚‹ãƒãƒ¼ãƒˆãƒ“ーツã®æ–¹ã€…ã‚„ã€ã‚¹ãƒ”ーカーã®æ–¹ã€…ã€æ¥ã¦ã„ãŸã ã„ãŸæ–¹ã€…ã«æ„Ÿè¬ã—ã¦ãŠã‚Šã¾ã™ éžå¸¸ã«æ¥½ã—ã‹ã£ãŸã§ã™ï¼ ãŸã ã„ã¾äºŒæ—¥é…”ã„ã§ã™w
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Getting started using CQL | DataStax Cassandra 1.2 Documentation
Bug #60575 for Net-Cassandra:
ericflo's twissandra at master - GitHub
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