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æ´æ°æ å ± 2017å¹´6æç¾å¨ãWalB ã®ããã¸ã§ã¯ããã¼ã¸ã¯https://walb-linux.github.io/ã§ãã ããã«ã¡ã¯ï¼ãµã¤ãã¦ãºã»ã©ãã®æéã§ãï¼ ä»æ¥ã¯ï¼å¹ççãªããã¯ã¢ããã¨éåæã¬ããªã±ã¼ã·ã§ã³ãç®çã¨ãã Linux ã«ã¼ãã«ãã©ã¤ã WalB ã«ã¤ãã¦ã®ç°¡åãªç´¹ä»ã¨ï¼ãã®ãã¼ã¸ã§ã³ 1.0 ã®ãªãªã¼ã¹åç¥ãããã¦é ãã¾ãï¼ WalB ã£ã¦ä½ï¼ WalB ã¯ãã¯ã«ãã¼ãã¨çºé³ãã¾ãï¼ååã®ç±æ¥ã¯ Block-level WAL ã§ãï¼WAL 㯠Write-Ahead Logging (ãã°å è¡æ¸ãè¾¼ã¿) ã®ãã¨ã§ï¼ãã¼ã¿ãã¼ã¹ã®ä¸è²«æ§å¶å¾¡çã«ç¨ãããã¾ãï¼ WalB ã使ãã¨ï¼ãªã³ã©ã¤ã³ç¶æ ã®ãããã¯ããã¤ã¹ã«ããã¦ï¼ã¢ããªã±ã¼ã·ã§ã³ããã¡ã¤ã«ã·ã¹ãã ã«ãããã¼ã¿æ¸ãè¾¼ã¿ã«ãã£ã¦çããå·®åãã¼ã¿ãï¼ãããã¯ããã¤ã¹ããã«ã¹ãã£ã³ãããã¨ãªãå¹ççã«åå¾åºæ¥ã
This document describes WalB, a Linux kernel device driver that provides efficient backup and replication of storage using block-level write-ahead logging (WAL). It has negligible performance overhead and avoids issues like fragmentation. WalB works by wrapping a block device and writing redo logs to a separate log device. It then extracts diffs for backup/replication. The document discusses WalB'
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