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Maintenance Page - Monavis
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GetItem - Amazon DynamoDB
ã“ã®ã‚»ã‚¯ã‚·ãƒ§ãƒ³ã§ã¯ã€API ãƒãƒ¼ã‚¸ãƒ§ãƒ³ 2011-12-05 ã«ã¤ã„ã¦è¨€åŠã—ã¦ã„ã¾ã™ã€‚ã“ã‚Œã¯éžæŽ¨å¥¨ãªã®ã§ã€æ–°ã—ã„アプリケーションã«ä½¿ç”¨ã—ãªã„ã§ãã ã•ã„。 ç¾åœ¨ã®ä½Žãƒ¬ãƒ™ãƒ«ã® API ã«é–¢ã™ã‚‹ãƒ‰ã‚ュメントã«ã¤ã„ã¦ã¯ã€Amazon DynamoDB API リファレンスをå‚ç…§ã—ã¦ãã ã•ã„。 説明 GetItem オペレーションã¯ã€ãƒ—ライマリã‚ーã«ä¸€è‡´ã™ã‚‹é …目㮠Attributes ã®ã‚»ãƒƒãƒˆã‚’è¿”ã—ã¾ã™ã€‚一致ã™ã‚‹é …ç›®ãŒãªã„å ´åˆã€GetItem ã¯ãƒ‡ãƒ¼ã‚¿ã‚’è¿”ã—ã¾ã›ã‚“。 デフォルトã§ã¯ã€GetItem オペレーションã¯ã€çµæžœæ•´åˆæ€§ã®ã‚ã‚‹èªã¿è¾¼ã¿ã‚’æä¾›ã—ã¾ã™ã€‚çµæžœæ•´åˆæ€§ã®ã‚ã‚‹èªã¿è¾¼ã¿ãŒã‚¢ãƒ—リケーションã§å—ã‘入れられãªã„å ´åˆã¯ã€ConsistentRead を使用ã—ã¾ã™ã€‚ã“ã®ã‚ªãƒšãƒ¬ãƒ¼ã‚·ãƒ§ãƒ³ã¯æ¨™æº–ã®èªã¿è¾¼ã¿ã‚ˆã‚Šã‚‚時間ãŒã‹ã‹ã‚‹ã“ã¨ãŒã‚ã‚Šã¾ã™ãŒã€å¸¸ã«æœ€å¾Œã«æ›´æ–°ã•ã‚ŒãŸå€¤ã‚’è¿”ã—ã¾ã™ã€‚詳細ã«ã¤ã„ã¦ã¯ã€ã€Œèªã¿è¾¼ã¿æ•´åˆæ€§
Exponential backoff - Wikipedia
Exponential backoff is an algorithm that uses feedback to multiplicatively decrease the rate of some process, in order to gradually find an acceptable rate. These algorithms find usage in a wide range of systems and processes, with radio networks and computer networks being particularly notable. An exponential backoff algorithm is a form of closed-loop control system that reduces the rate of a con
DynamoDBã®JSONサãƒãƒ¼ãƒˆã‚’rubyã§è©¦ã™ - Qiita
ã¨ã—ã¦ã„ã¾ã™ã€‚ テーブルã®æº–å‚™ http://aws.amazon.com/jp/blogs/aws/dynamodb-update-json-and-more/ ã§æ›¸ã‹ã‚Œã¦ã„るデータを使ã†ã“ã¨ã«ã—ãŸã®ã§ã€åå‰ãŒ people ã§ã€person_id ã‚’ Hash Key ã¨ã™ã‚‹ãƒ†ãƒ¼ãƒ–ルを作りã¾ã™ã€‚ コードã¯ä»¥ä¸‹ã®é€šã‚Šã€‚アクセスã‚ーã¯é©å®œä¿®æ£ãã ã•ã„ã¾ã›ã€‚。。 require 'aws-sdk-core' dynamo_db = Aws::DynamoDB::Client.new( :region => "ap-northeast-1", :access_key_id => "XXXXXXXXXXXXXX", :secret_access_key => "XXXXXXXXXXXXXXXXXXXXX" ) resp = dynamo_db.create_table( table_name:
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