Date: Mon, 12 Jan 2009 21:53:22 -0500 From: Yoshihiro Ota <ota@j.email.ne.jp> To: Christoph Mallon <christoph.mallon@gmx.de> Cc: ota@j.email.ne.jp, hackers@freebsd.org Subject: Re: gcache [was: Re: 3x read to write ratio on dump/restore] Message-ID: <20090112215322.1c284010.ota@j.email.ne.jp> In-Reply-To: <496B1E47.1030403@gmx.de> References: <20090109.095027.-1672857892.imp@bsdimp.com> <20090111041710.GB5661@server.vk2pj.dyndns.org> <20090112050537.f423215c.ota@j.email.ne.jp> <496B1E47.1030403@gmx.de>
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On Mon, 12 Jan 2009 11:41:11 +0100 Christoph Mallon <christoph.mallon@gmx.de> wrote: > Yoshihiro Ota schrieb: > > Try GEOM Cache(gcache). > > Just a side note: gcache does not seem to have any documentation. "man > gcache" is unsuccessful, geom(8) does not mention it (geom and gcache > are the same hardlinked binary). Is there information about it somewhere? The CVS log was the best document available I took a look back in one year ago: http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/geom/cache/g_cache.h?rev=1.1 About the link, it is also true for many other providors, too. That is based on how GEOM library were implemented and so on. % ls -i /sbin/g* 590 /sbin/gbde 495 /sbin/ggatel 520 /sbin/gpt 592 /sbin/gcache 592 /sbin/gjournal 592 /sbin/graid3 592 /sbin/gconcat 592 /sbin/glabel 524 /sbin/growfs 592 /sbin/geli 592 /sbin/gmirror 592 /sbin/gshsec 592 /sbin/geom 592 /sbin/gmultipath 592 /sbin/gstripe 258 /sbin/ggatec 592 /sbin/gnop 528 /sbin/gvinum 440 /sbin/ggated 592 /sbin/gpart 592 /sbin/gvirstor Hiro
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