Date: Thu, 12 Nov 2009 12:54:44 -0800 From: Artem Belevich <fbsdlist@src.cx> To: =?ISO-8859-1?Q?Dag=2DErling_Sm=F8rgrav?= <des@des.no> Cc: Rick Macklem <rmacklem@uoguelph.ca>, Dan Nelson <dnelson@allantgroup.com>, Scott Ullrich <sullrich@gmail.com>, freebsd-current@freebsd.org, Ivan Voras <ivoras@freebsd.org>, "Sam Fourman Jr." <sfourman@gmail.com> Subject: Re: Help ZFS FreeBSD 8.0 RC2 Write performance issue Message-ID: <ed91d4a80911121254v77ae48eatd720cff7dcbb9bc@mail.gmail.com> In-Reply-To: <86my2ro51s.fsf@ds4.des.no> References: <11167f520911111050j36dd94far667c81e6f5c18e69@mail.gmail.com> <20091111204903.GI89052@dan.emsphone.com> <11167f520911111326v13bb442bt36e853afbecdf834@mail.gmail.com> <9bbcef730911111352t12188bdajbca71bcf35a5beb5@mail.gmail.com> <Pine.GSO.4.63.0911121147310.9126@muncher.cs.uoguelph.ca> <11167f520911121044l74744c30u5a4d9ca008ab863c@mail.gmail.com> <d5992baf0911121048o76c1543el2b4d9de84ffb107@mail.gmail.com> <11167f520911121101o403751ddmb544dfaf1c61bf1e@mail.gmail.com> <ed91d4a80911121219sa0f3fa3s934791725028a966@mail.gmail.com> <86my2ro51s.fsf@ds4.des.no>
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2009/11/12 Dag-Erling Sm=F8rgrav <des@des.no>: > The zpool(1M) manpage seems to disagree: > > =A0 =A0 =A0 Log =A0devices =A0can =A0be added, replaced, attached, detach= ed, and imported > =A0 =A0 =A0 and exported as part of the larger pool. Solaris' man page has somewhat different wording -- it indicates that only part of mirrored log device can be removed. See http://docs.sun.com/app/docs/doc/819-2240/zpool-1m In any case the reality is that you can not remove log vdev from the pool: $ zpool status z1 pool: z1 state: ONLINE scrub: none requested config: NAME STATE READ WRITE CKSUM z1 ONLINE 0 0 0 mirror ONLINE 0 0 0 ada3p3 ONLINE 0 0 0 ada2p3 ONLINE 0 0 0 logs ONLINE 0 0 0 gpt/zil ONLINE 0 0 0 cache gpt/l2arc ONLINE 0 0 0 errors: No known data errors $ zpool remove z1 gpt/zil Password: cannot remove gpt/zil: only inactive hot spares or cache devices can be rem= oved --Artem
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