Date: Tue, 28 Aug 2007 03:00:44 -0700 (PDT) From: Simun Mikecin <numisemis@yahoo.com> To: freebsd-fs@freebsd.org, pjd@freebsd.org Subject: zfs and BIO_FLUSH on amr(4) Message-ID: <937640.78988.qm@web36613.mail.mud.yahoo.com>
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Using storage on amr(4) controller with zfs revealed reduced write performance.
It seems that writing to zfs concludes with a BIO_FLUSH call to flush the controller cache to
disk.
amr(4) can have onboard cache memory with or without battery backup. Is BIO_FLUSH call really
needed when amr(4) is used with onboard cache memory with a battery backup?
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