Compression results probably depend GREATLY on the algorithm you choose. GZip at any level is expensive. At -9 it's very onerous.
Sent from my iPhone > On Jun 16, 2015, at 12:57 AM, Paul Sture <[email protected]> wrote: > > I have an HP MicroServer N40L as a test machine with a mixture of disks > (2 x 3TB, 1 x 2TB and 1 x 1.5TB) so a 2 + 2 RAID1 configuration seemed > the sensible way to go from the start. > > I have had absolutely no problems with disk performance running SmartOS > zones (it's an AMD CPU, so no KVM on this box); in fact for compiling > smallish programs it beats the pants off my much faster Mac minis, which > I put down to its superior disk performance. > > It is however pretty slow with compression/decompression - using > uncompressed tarfiles to transfer files in and out of this system is > a *lot* faster than trying to save network bandwidth by compressing > first. > >> On 16 Jun 2015, at 3:18, Sebastien Perreault wrote: >> >> Hi, >> >> I've been using similar servers for a while for KVM linux machines, and >> the only I was able to achieve decent performance with no SLOG was with >> RAID MIRROR only configuration, so 2 disks with 2 disks, not perfect but >> good enough for my needs. >> >> I did try the default RAID-Z, that was a no-go, but RAID MIRROR is ok >> (it's still SATA disks in the end). >> >> Seb, >> >>> On Mon, Jun 15, 2015 at 9:07 PM, <[email protected]> wrote: >>> >>> one of my clients owns a supermicro-based box with 4 hot-swap sata bays. >>> it has integrated SATA and (i believe) no SAS. the original admin populated >>> it with (3) 1TB SATA disks and commissioned it as a fileserver (simple >>> raid5). it has 32GB of memory. the box is no longer being used, so it's >>> been allocated to me for the purpose of hosting another windows server. i'd >>> like to virtualize the server via smartos/kvm but i have reservations. >>> >>> i believe i can get away with using only 16GB for VMs, so that leaves 16GB >>> for smartos/zfs - i think that'll probably work well. but i seriously doubt >>> those disks will give anything resembling decent performance. i only have 4 >>> bays to work with, and only one is currently free. for a windows server VM >>> hosting a multi-user database, would adding a SATA SSD as log device for >>> the zones zpool keep me out of hot water here or is this just not going to >>> work? >>> >>> obviously i can try to source a supported SAS controller and disks, but >>> i'm wondering if i can actually get by with SATA ... what if i filled the >>> (4) 3.5" bays with SSDs and striped across two mirrors? would that mostly >>> guarantee decent performance, or will that just waste time and money? >>> >>> experienced opinions greatfully accepted! >>> >>> >>> ------------------------------------------- >>> smartos-discuss >>> Archives: https://www.listbox.com/member/archive/184463/=now >>> RSS Feed: >>> https://www.listbox.com/member/archive/rss/184463/26900931-98fbc364 >>> Modify Your Subscription: >>> https://www.listbox.com/member/?&; >>> Powered by Listbox: http://www.listbox.com >> >> >> >> -- >> Sebastien Perrreault >> Partner >> Les Technologies Alesium Inc >> P: 514-298-7193 >> F: 514-221-3668 >> E: [email protected] >> >> "Life's missed opportunities, at the end, may seem more poignant to us than >> those we embraced--because in our imagination they have a perfection that >> reality can never rival." -- Roger Ebert >> >> >> >> ------------------------------------------- >> smartos-discuss >> Archives: https://www.listbox.com/member/archive/184463/=now >> RSS Feed: https://www.listbox.com/member/archive/rss/184463/27157529-01fe90e8 >> Modify Your Subscription: https://www.listbox.com/member/?&; >> Powered by Listbox: http://www.listbox.com > > > -- > Paul Sture > > > ------------------------------------------- > smartos-discuss > Archives: https://www.listbox.com/member/archive/184463/=now > RSS Feed: https://www.listbox.com/member/archive/rss/184463/22103350-51080293 > Modify Your Subscription: https://www.listbox.com/member/?&; > Powered by Listbox: http://www.listbox.com ------------------------------------------- smartos-discuss Archives: https://www.listbox.com/member/archive/184463/=now RSS Feed: https://www.listbox.com/member/archive/rss/184463/25769125-55cfbc00 Modify Your Subscription: https://www.listbox.com/member/?member_id=25769125&id_secret=25769125-7688e9fb Powered by Listbox: http://www.listbox.com
