Software and Hardware Raid
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ok thanks. i will check out post of yours.
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@scottalanmiller I bet I can guess which is which
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@scottalanmiller this is a little confusing. Are you saying I would get better performance from software raid? I would have thought performance would be better with hardware raid.
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@jmoore said in Software and Hardware Raid:
@scottalanmiller this is a little confusing. Are you saying I would get better performance from software raid? I would have thought performance would be better with hardware raid.
This is Scott's claim - Surprises me, I would have figured that the ASICs on the RAID controllers would be tuned specifically to be as fast as the pipes could allow.
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@scottalanmiller interesting post, thanks. So in the enterprise which is mostly Linux then it's mostly software raid?
If your on a desktop then hardware if your using windows and personal preference if your on a Linux desktop?
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@jmoore said in Software and Hardware Raid:
@scottalanmiller interesting post, thanks. So in the enterprise which is mostly Linux then it's mostly software raid?
If your on a desktop then hardware if your using windows and personal preference if your on a Linux desktop?
Do you know those using RAID on desktops? It's pretty rare.
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@jmoore said in Software and Hardware Raid:
@scottalanmiller interesting post, thanks. So in the enterprise which is mostly Linux then it's mostly software raid?
Well, not necessarily. Remember that enterprises "never" run operating systems on bare metal, so the OS should "never" be discussed when talking about RAID because the hypervisor, not the OS, should be talking to the storage 99.9999% of the time. So while Linux has great RAID and Windows has crap RAID, that alone tells us nothing. These are only useful for providing historical context as to market trends or to provide underlying insight into some hypervisors.
What actually matters is what hypervisor or storage server is being used. This is way more important. With Xen and KVM, software RAID is great. With Hyper-V and ESXi, hardware RAID is needed.
However, in the enterprise, RAID is essentially dead. So talking about RAID at all tends to mean that we are discussing the SMB space.
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@dashrender said in Software and Hardware Raid:
@jmoore said in Software and Hardware Raid:
@scottalanmiller interesting post, thanks. So in the enterprise which is mostly Linux then it's mostly software raid?
If your on a desktop then hardware if your using windows and personal preference if your on a Linux desktop?
Do you know those using RAID on desktops? It's pretty rare.
I do know some, and yes, very rare.
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@jmoore said in Software and Hardware Raid:
If your on a desktop then hardware if your using windows and personal preference if your on a Linux desktop?
If you are using Windows on a desktop, typically you just suck it up and use something crappy. If you are using Linux on your desktop, then software RAID would nearly always be the answer.
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@dashrender not too much. I got 1 workstation at work that someone else setup a long time ago
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@dashrender said in Software and Hardware Raid:
@jmoore said in Software and Hardware Raid:
@scottalanmiller interesting post, thanks. So in the enterprise which is mostly Linux then it's mostly software raid?
If your on a desktop then hardware if your using windows and personal preference if your on a Linux desktop?
Do you know those using RAID on desktops? It's pretty rare.
I am on my home machine, but I know I'm the exception that proves the rule in this case.
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@scottalanmiller said in Software and Hardware Raid:
@jmoore said in Software and Hardware Raid:
- Is there much of a difference between Windows and Linux software raid?
Huge. One is enterprise ready and the other is so bad that it creates the need for the hardware RAID industry.
This statement no longer has any value, and hasn't for a long time now. It's based off of ancient data, yet you still say the same thing every time it's mentioned.
Don't confuse the lack of technical skill regarding a specific technology, with the tech itself being bad. I agree with your statement over 10 years ago, but this is no longer the case.
Personal experience of a tech in SMB does not reflect an entire industry or enterprise industry.
That said, I have used both almost equally in a number of scenarios, and in every case, I would say the opposite of you.
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@tim_g said in Software and Hardware Raid:
@scottalanmiller said in Software and Hardware Raid:
@jmoore said in Software and Hardware Raid:
- Is there much of a difference between Windows and Linux software raid?
Huge. One is enterprise ready and the other is so bad that it creates the need for the hardware RAID industry.
This statement no longer has any value, and hasn't for a long time now. It's based off of ancient data, yet you still say the same thing every time it's mentioned.
Don't confuse the lack of technical skill regarding a specific technology, with the tech itself being bad. I agree with your statement over 10 years ago, but this is no longer the case.
Personal experience of a tech in SMB does not reflect an entire industry or enterprise industry.
That said, I have used both almost equally in a number of scenarios, and in every case, I would say the opposite of you.
I think what it comes down to being "enterprise ready" is a proper GUI tool to manage it... but the tech itself, definitely enterprise ready.
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@tim_g said in Software and Hardware Raid:
@tim_g said in Software and Hardware Raid:
@scottalanmiller said in Software and Hardware Raid:
@jmoore said in Software and Hardware Raid:
- Is there much of a difference between Windows and Linux software raid?
Huge. One is enterprise ready and the other is so bad that it creates the need for the hardware RAID industry.
This statement no longer has any value, and hasn't for a long time now. It's based off of ancient data, yet you still say the same thing every time it's mentioned.
Don't confuse the lack of technical skill regarding a specific technology, with the tech itself being bad. I agree with your statement over 10 years ago, but this is no longer the case.
Personal experience of a tech in SMB does not reflect an entire industry or enterprise industry.
That said, I have used both almost equally in a number of scenarios, and in every case, I would say the opposite of you.
I think what it comes down to being "enterprise ready" is a proper GUI tool to manage it... but the tech itself, definitely enterprise ready.
A proper GUI makes something enterprise ready, really?
We've had GUI tools to manage LVM and drive partitions on Ubuntu/Red Hat/Etc for decades. Doesn't mean any sane person would run a GUI on one of those servers!
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@dashrender I think I will setup a desktop and do some testing myself. I was originally curious if there was a consensus but I think it's pretty obvious there is not.
I think I will now setup raid on a desktop
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@scottalanmiller why is raid dead in the enterprise?
Why do hyper-v and esxi need hardware controllers?
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@tim_g said in Software and Hardware Raid:
@scottalanmiller said in Software and Hardware Raid:
@jmoore said in Software and Hardware Raid:
- Is there much of a difference between Windows and Linux software raid?
Huge. One is enterprise ready and the other is so bad that it creates the need for the hardware RAID industry.
This statement no longer has any value, and hasn't for a long time now. It's based off of ancient data, yet you still say the same thing every time it's mentioned.
Nothing has really changed. Windows Software RAID is still the same as it has always been. I say the same thing every time and no one has brought to light any new info on this to me to date. It's not ancient data, it is current data.
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@jmoore said in Software and Hardware Raid:
Why do hyper-v and esxi need hardware controllers?
Because Hyper-V has no production level RAID option, and ESXi has no software RAID whatsoever.
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@jmoore said in Software and Hardware Raid:
@scottalanmiller why is raid dead in the enterprise?
Enterprise is going to be using network level raid utilizing some sort of erasure coding. So instead of having a single server responsible for storing data, you have many servers storing data with however much parity is needed to maintain data. Example: https://www.backblaze.com/blog/reed-solomon/
Why do hyper-v and esxi need hardware controllers?
Windows, because nobody really trusts Windows to manage lots of drives. Seriously, the RAID may be rock solid now, but when drives randomly disappear and reappear it's insane to let it manage a RAID.
ESXi, because that's what they say, and how the system was designed.
