In his ConstantThinking blog "Solaris ZFS, Synchronous Writes and the ZIL Explained," Oracle consultant Constantine Gonzalez blogs about a topic that crops up frequently in his experience with users: synchronous writes and the ZIL. His personal experience indicates that ZFS performance problems (also part of this blog) have a frequent connection with synchronous writes as well. His leading advice: Don't blame the ZIL!
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