Date: Sat, 21 May 2011 10:57:51 -0500 From: Adam Vande More <amvandemore@gmail.com> To: "Vladislav V. Prodan" <universite@ukr.net> Cc: FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: Tell a minimum requirement for RAM for virtual machines (virtualbox) Message-ID: <BANLkTikAyZis1N8%2BhMZjC%2B5yZy1TQ4bPLw@mail.gmail.com> In-Reply-To: <4DD638C1.7080007@ukr.net> References: <4DD638C1.7080007@ukr.net>
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On Fri, May 20, 2011 at 4:47 AM, Vladislav V. Prodan <universite@ukr.net>wrote: > Tell choice OS (8.2, 8.2-CURRENT or 9.0-CURRENT, FS (UFS or ZFS) and the > minimum amount of RAM for use in such schemes: > 1) the interaction of multiple routers with established quagga (bgpv4, > bgpv6, ospf) > 2) the work of two different modes of MYSQL replication servers/clusters. > 3) backup zfs partitions/snapshots to a remote server > > > Host machine - win7 64x with 6 GB of RAM > > Thank you for your advice. > Couple things to think about. Virtualbox by default doesn't obey flush cache commands. This is potentially a very bad thing so you'll want to look a changing the default for any ZFS VM, and probably any VM doing DB operations unless speed is more of a priority than data integrity. The other thing to keep in mind is i386 binaries use less RAM than their amd64 counter parts. For this reason, I always make my VM's 32 bit to achieve higher VM density. I have not had trouble with ZFS on i385 with 1GB+ of RAM when following the recommended tuning, but I haven't used a heavily used them either. I prefer to use the MFSBSD ZFS v28 i386 iso for the install. -- Adam Vande More
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