Softraid overhead cpu full#
Softraid overhead cpu software#
Softraid overhead cpu windows#

Nothing indicated that it was cause by lack of CPU resources.Ī IRL filecopy over the network was actually fine but it cannot be used for much as Windows's cache is playing to much around here.Īll in all, I didn't get the result I was hoping for, nor am I convinced that this cannot work as I did get very nice RAID5 software performance on the NAS guest itself (of course without cache).

Softraid overhead cpu windows#

I also sat up the Windows guest as iSCSI initiator and again the speed was not good using diskspd.exe as benchmark tool with and without cache.I got some really crazy unusable numbers, indicating that something somewhere is very wrong, again this could be an iSCSI optimization issue.

I then sat up ESX as iSCSI initiator and created a virtual hdd on it, but didn't get the speed I was hoping for.but this might be a iSCSI optimization issue. I did get about 130MB/s write speed on NAS4FREE itself (benchmark with cache disabled), which moved me into a optimistic mood :-) :-) :-) ESX and the NAS4FREE was booted up from a M.2 NVMe disk (this gave me an extra 'storage controller' available for ESX). The whole Intel onboard SATA controller was passed through to the guest in ESX. I got NAS4FREE up and running as guest, created a RAID5 (3 disks) and sat it up as iSCSI target. It still requires having similar hardware and a hope, but realistically we're talking about restoring backups onto a different array anyway in the case of hardware failure. In a reasonable scenario slightly outside of the low end of SMB, if a RAID card fails, you can always grab an old server/card and import the config. I was thinking Xeons, but big beefy ones and not something comparable in core count to the i3 you're running. I'll eat my words slightly about the TDP of the smaller processors. I'm curious to see what you're able to achieve in the end.

I might have to eat my own words.we'll see :-P Well, I still have to confirm if my SW RAID is actually useful, I'll get back with some numbers. You don't wanna have a server down for 1-2-3.14 dayes, so you have to buy two controllers, one for spare = double price!.no thank you. Try to get another controller from your dealer in 15 minutes! I just restore the VM image and I'm good to go, even on ANY metal. In my view software RAID is not another point of failure. My server CPU do nothing 95% of the can just as well do some RAID :-P I run 5 VM servers and several users using terminal services on this little CPU.it just do the job :-Pġ4W is not only a small increase. SuperMicro server-class board with 2+1 NIC, 4 disks, i3 3.7Mhz CPU with EEC support, AES instructions for your VM VPN firewall.

Softraid overhead cpu full#

The server I have use 21 Watt idle! 45w at full thrust (which it never do IRL). It's worth considering the opportunity cost to figure all of this out and test and deploy on your own versus buying a tested and reliable solution and moving on to other problems. You can get good or even excellent performance out of software RAIDs, but RSTe is not the way to go. You're adding another point of failure, but it's the same point of failure as the software layer that is handling your storage.

If the controller dies, yes, you need a replacement.

And the fans should be mounted with rubber bushings, so vibrations aren't really an issue. Adding 10% to the heat load when any good configuration is going to already have a fan blowing across the PCI-e bus or the risers is minimally more expensive.

14W is probably 1/10 of the TDP of a single processor.

You can get a halfway decent card for sub-$300, and very solid ones at $500 depending your application.

It seem software RAID based on FreeBSD (NAS4FREE, FREENAS) or even basic RAID on Linux can give you good performance.I'm making a test-setup at the moment, I know soon if it is the way to go.cannot say yet A dependency I can be without.Ī controller does have it's advantages, but it's not all heaven -) Yes, but a controller with RAM is costly, add another point of failure, use a lot of power: 14Watt! (which again create more heat in your server room, need more/faster cabinet fans which again add 2 more watts, The extra FANs create more vibrations that your disks don't like, and you can be in trouble if your controller dies and you can't get another quickly or cannot get it at all because it's absolute.