Date: Fri, 4 Nov 2022 21:40:21 -0600 From: Alan Somers <asomers@freebsd.org> To: freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: zfs compression on a volume Message-ID: <CAOtMX2j6i6ukiXTueRh5hnocJbiL_Ca89ME8o0RS3McnWrDaTQ@mail.gmail.com> In-Reply-To: <Y2XIpJ%2BHiBj7QcC1@openbsd.local> References: <Y2XIpJ%2BHiBj7QcC1@openbsd.local>
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--000000000000e861e105ecb0f3e0 Content-Type: text/plain; charset="UTF-8" The cycles are wasted because the data is incompressible. On Fri, Nov 4, 2022, 8:21 PM void <void@f-m.fm> wrote: > Hi fs@ > > If a vm is created in bhyve on a freebsd host, and that vm is > zvol-backed, and the guest itself is encrypted with for > example lukfs(?) if it's linux, if the zvol compression > is set to for example zstd, does the vol get compressed, > or are cycles wasted compressing the uncompressible? > > TIA, > > --000000000000e861e105ecb0f3e0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"auto"><div>The cycles are wasted because the data is incompress= ible.<br><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_att= r">On Fri, Nov 4, 2022, 8:21 PM void <<a href=3D"mailto:void@f-m.fm">voi= d@f-m.fm</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D= "margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi fs@<br> <br> If a vm is created in bhyve on a freebsd host, and that vm is<br> zvol-backed, and the guest itself is encrypted with for<br> example lukfs(?) if it's linux, if the zvol compression<br> is set to for example zstd, does the vol get compressed,<br> or are cycles wasted compressing the uncompressible?<br> <br> TIA,<br> <br> </blockquote></div></div></div> --000000000000e861e105ecb0f3e0--
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