On Aug 26, 2013 9:02 PM, "Stefan G. Weichinger" <li...@xunil.at> wrote: > > > We now get into choosing hardware for that shiny new gentoo-server ... > > as mentioned this will be a KVM-host and we look at a HP Proliant DL385p > ... 2 AMD Opteron 6344 ... 32 GB RAM, 8 disks (the customer has some > bigger contract with hp, so we are a bit biased to hp here). > > For the server that runs the VMs right now we back then chose 2 smaller > SAS-disks for the OS (speed, expensive) and installed SLES on a mirror > built on those 2 disks. The other 8 (?) SATA-disks run in a RAID-6 ... > > Now I ask myself if I want to do that again: > > 2 smaller disks, fast, RAID1 -> OS/ Gentoo (SSD? I think, no) > > 6 bigger disks, maybe 7200rpm, SATA -> RAID6 -> LVM -> space for VMs > (maybe straight LVs for the VM-disks ... performs well, nice backups) > > Or should I go for all 8 disks in a RAID6 ... ? > > I'd like to discuss that and hear your opinions and experiences. > > Thanks! > >
2 smallest disks in RAID1 configuration for booting. Then the 6 disks as JBOD and use it within a RAIDZ2 array. Or, 6 disks in JBOD, add them a 3 ZFS mirror vdev's. Rgds, --
