Write Ahead Physical Block Logging
Write Ahead Physical Block Logging (WAPBL) provides meta data journaling for file systems in conjunction with Fast File System (FFS) to accomplish rapid filesystem consistency after an unclean shutdown of the filesystem and better general use performance over regular FFS.[1]Template:R/superscript[2]Template:R/superscript[3]Template:R/superscript[4]Template:R/superscript With the journal, fsck is no longer required at system boot; instead, the system can replay the journal in order to correct any inconsistencies in the filesystem if the system has been shut down in an unclean fashion.[3]Template:R/superscript
History
WAPBL was initially committed into NetBSD in 2008, and first appeared with NetBSD 5.0 (2009).[5]Template:R/superscript[2]Template:R/superscript[6]Template:R/superscript
With NetBSD 6.0 (2012), soft updates (known as soft dependencies in NetBSD) was removed in favour of WAPBL.[7]Template:R/superscript[8]Template:R/superscript
See also
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References
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External links
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