Date: Wed, 30 Mar 2011 13:18:31 +0300 From: George Kontostanos <gkontos.mail@gmail.com> To: Alexander Leidinger <Alexander@leidinger.net> Cc: freebsd-current@freebsd.org Subject: Re: ZFS dedup and temporary freeze Message-ID: <AANLkTinY50DcBUcXh4NhabYbXLQOE68y1cZTrbnd0oas@mail.gmail.com> In-Reply-To: <20110330095304.990627vk8z9lvdz4@webmail.leidinger.net> References: <AANLkTik_25%2BTr10dLKnOZaGnnHYpDmF=PBAueoxCUoZB@mail.gmail.com> <20110330095304.990627vk8z9lvdz4@webmail.leidinger.net>
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As far as I am aware ezjail has the option to use compression and disable access time updates. ezjail_zfs_properties="-o compression=lzjb -o atime=off" In my case the dedup option was turned on only in the basejail causing the system to temporarily freeze. Once the dedup option was removed everything went back to normal. What I am trying to figure out here is why did this occur. Thanks On Wed, Mar 30, 2011 at 10:53 AM, Alexander Leidinger < Alexander@leidinger.net> wrote: > Quoting George Kontostanos <gkontos.mail@gmail.com> (from Tue, 29 Mar 2011 > 17:57:49 +0300): > > I thought that jails would be a good candidate for dedup. So far I am >> using >> it without any issues in my /usr/src and /virtualBox directories. >> > > No idea about your problem, but ezjail is already doing some dedup. The > basejail is the dedup-place, and the jails do a null-mount of it. Inside the > jails are only some links to the basejail. So if you do not install the same > programs (the same packages, so make sure there is no different compile > timestamp (some programs have this) inside the newly generated binaries) or > data inside the jail-specific area, you will not have a benefit from this. > > Bye, > Alexander. > > -- > Real programmers never work 9 to 5. If any real > programmers are around at 9 a.m., it's because they > were up all night. > > http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID = B0063FE7 > http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID = 72077137 > -- George Kontostanos aisecure.net <http://www.aisecure.net>;
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