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Re: [Xen-users] Cheap IOMMU hardware and ECC support importance

Mihail Ivanov <mihail.ivanov93@xxxxxxxxx> writes:

> So next thing I've read about RAID, so I am thinking of raiding 2 x WD
> Black 2 TB. (Should I do software raid or hardware raid?)

Software raid can mean quite a slowdown compared to hardware raid.

Disks fail.  The only question is when.

> Also I will be using ZFS and my Dom0 will be Fedora.

Fedora for a dom0 is a rather bad choice.  Fedora is an experimental
testing distribution with a very limited lifetime and prone to
experience lots of unexpected or undesirable changes.  It is not suited
for servers, which you can tell by all the things you get installed by
default and by what they perceive as their user base.  It's targeted for
laptops, maybe desktops, and the makers of it don't care and don't want
to hear what its users think.  Unless you have a requirement to use very
recent software which you cannot have otherwise, or if you want to try
out new things, it doesn't make sense to use Fedora.

> The question I am still pondering is whether I should get an E3 Xeon
> (no E3's with IGP are sold in my country), an 6-core E5 Xeon or AMD FX
> 8***,

Is power consumption an issue you need to consider?

As someone suggested, it might be a good idea to go for certified
hardware.  My server is going down about every 24 hours with a flood of
messages in dom0 like "aacraid 0000:04:00.0: swiotlb buffer is full (sz:
4096 bytes)", and it's actual server hardware.  I made a bug report a
while ago; nobody cares and I keep pressing the reset button.  You
probably don't want to end up like that.

And after spending quite a bunch of money on hardware, you might want to
use something else than xen.  Give it a try and set up a couple VMs on a
testing machine so you get an idea of what you're getting into, and

Knowledge is volatile and fluid.  Software is power.

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