RAID - the king of the storage landscape or legacy?
-
"Will the new and comparatively expensive alternatives like erasure coding, local reconstruction codes and Redundant Area of Independent Nodes prove to be more reliable and can RAID keep up with the latest generation of high capacity hard drives? – We think not. The new storage technology may be expensive but it definitely serves us with better data protection and high performance. So who will be the new king of the storage landscape; only time will tell."
- Erasure encoding is not new, that's RAID 5, for example. He's using a term he doesn't even know.
- RAIN has already moved into this place.
This article looks like it was written in 2008 by someone just hearing about RAID in their first college class.
-
Did anyone really expect a vendor posted article to be useful?
-
@rojoloco said in RAID - the king of the storage landscape or legacy?:
Did anyone really expect a vendor posted article to be useful?
They have loads of good ones. This one was written by a guy who has nothing but a degree in the wrong field, and an entry level foot in the door of the helpdesk cert to claim as his credentials.
-
There is a fundamental misunderstanding from this author about why RAID exists, and that is to offer some immunity to hard drive failure, nothing more, nothing less.
Reason being, you may have protection against hardware failure but when it comes to protection against corrupt files, errors or malicious activity, you have serious vulnerabilities.
Well no shit sherlock. RAID is purely to protect you against the first bit, a decent backup scheme protects against the second, it was never conceived of or designed to do more than protect against hardware failure.
Since there is an increased stress on the array when data bits are gathered to rebuild the failed and erroneous disc, there is the potential risk of double-disk fault and read error – hence the shift from RAID to more recent data storage mechanisms.
Umm, more recent data storage mechanisms? What, like RAID10? Any "mecahnism" that involves data spread out across lots of disks with some sort of redundancy is going to be a RAID array by definition. It is an Redundant Array (or collection) of Independent Disks after all.
What an idiotic out of touch (and date) article.
-
@jrc exactly, this is written like a homework assignment of someone who just heard about RAID in a freshman class, and wrote a really bad paper mostly lifted from Wikipedia (including the pictures), but without context and with a fundamentally wrong understanding of the topic. This would get a passing grade in a low end college, but only because it is "moderately acceptable homework", nothing more.
-
Also, isn't RAIN basically an array of RAIDs ??
And there, I posted a comment for the author on his article.
-
@jrc said in RAID - the king of the storage landscape or legacy?:
Also, isn't RAIN basically an array of RAIDs ??
No, that would be Network RAID.
-
@scottalanmiller said in RAID - the king of the storage landscape or legacy?:
@jrc said in RAID - the king of the storage landscape or legacy?:
Also, isn't RAIN basically an array of RAIDs ??
No, that would be Network RAID.
That how would you define RAIN? Wouldn't each node be a NAS of some sort, and more than likely that NAS would be configured with RAID, or am I missing something?
-
@jrc said in RAID - the king of the storage landscape or legacy?:
@scottalanmiller said in RAID - the king of the storage landscape or legacy?:
@jrc said in RAID - the king of the storage landscape or legacy?:
Also, isn't RAIN basically an array of RAIDs ??
No, that would be Network RAID.
That how would you define RAIN? Wouldn't each node be a NAS of some sort, and more than likely that NAS would be configured with RAID, or am I missing something?
It depends. RAIN is a blanket term for a lot of things, unlike RAID which is quite specific. You could make a great argument that Network RAID is a member of the RAIN family.
But in general terms, if you use Network RAID (treating each node as a disk) it's not called RAIN.
RAIN is assumed to have nodal awareness. RAID treats all members as drives and can't tell what is a node, and what is a drive.
-
@scottalanmiller said in RAID - the king of the storage landscape or legacy?:
@jrc said in RAID - the king of the storage landscape or legacy?:
@scottalanmiller said in RAID - the king of the storage landscape or legacy?:
@jrc said in RAID - the king of the storage landscape or legacy?:
Also, isn't RAIN basically an array of RAIDs ??
No, that would be Network RAID.
That how would you define RAIN? Wouldn't each node be a NAS of some sort, and more than likely that NAS would be configured with RAID, or am I missing something?
It depends. RAIN is a blanket term for a lot of things, unlike RAID which is quite specific. You could make a great argument that Network RAID is a member of the RAIN family.
But in general terms, if you use Network RAID (treating each node as a disk) it's not called RAIN.
RAIN is assumed to have nodal awareness. RAID treats all members as drives and can't tell what is a node, and what is a drive.
What type of system would be a good example of RAIN? Gluster? Ceph? or am I totally missing the boat?
-
@dafyre said in RAID - the king of the storage landscape or legacy?:
@scottalanmiller said in RAID - the king of the storage landscape or legacy?:
@jrc said in RAID - the king of the storage landscape or legacy?:
@scottalanmiller said in RAID - the king of the storage landscape or legacy?:
@jrc said in RAID - the king of the storage landscape or legacy?:
Also, isn't RAIN basically an array of RAIDs ??
No, that would be Network RAID.
That how would you define RAIN? Wouldn't each node be a NAS of some sort, and more than likely that NAS would be configured with RAID, or am I missing something?
It depends. RAIN is a blanket term for a lot of things, unlike RAID which is quite specific. You could make a great argument that Network RAID is a member of the RAIN family.
But in general terms, if you use Network RAID (treating each node as a disk) it's not called RAIN.
RAIN is assumed to have nodal awareness. RAID treats all members as drives and can't tell what is a node, and what is a drive.
What type of system would be a good example of RAIN? Gluster? Ceph? or am I totally missing the boat?
Yes, Cluster, CEPH, SCRIBE, Exablox... all RAIN. Traditional RAIN by everyone's standards.
-
@scottalanmiller said in RAID - the king of the storage landscape or legacy?:
@dafyre said in RAID - the king of the storage landscape or legacy?:
@scottalanmiller said in RAID - the king of the storage landscape or legacy?:
@jrc said in RAID - the king of the storage landscape or legacy?:
@scottalanmiller said in RAID - the king of the storage landscape or legacy?:
@jrc said in RAID - the king of the storage landscape or legacy?:
Also, isn't RAIN basically an array of RAIDs ??
No, that would be Network RAID.
That how would you define RAIN? Wouldn't each node be a NAS of some sort, and more than likely that NAS would be configured with RAID, or am I missing something?
It depends. RAIN is a blanket term for a lot of things, unlike RAID which is quite specific. You could make a great argument that Network RAID is a member of the RAIN family.
But in general terms, if you use Network RAID (treating each node as a disk) it's not called RAIN.
RAIN is assumed to have nodal awareness. RAID treats all members as drives and can't tell what is a node, and what is a drive.
What type of system would be a good example of RAIN? Gluster? Ceph? or am I totally missing the boat?
Yes, Cluster, CEPH, SCRIBE, Exablox... all RAIN. Traditional RAIN by everyone's standards.
I'm familiar with Gluster and Ceph. Exablox is not open source...
SCRIBE is done by @scale -- so it's not open source, right?
-
Well, I think you guys really RAIN'd on this guys parade. Good work.
-
@dafyre said in RAID - the king of the storage landscape or legacy?:
@scottalanmiller said in RAID - the king of the storage landscape or legacy?:
@dafyre said in RAID - the king of the storage landscape or legacy?:
@scottalanmiller said in RAID - the king of the storage landscape or legacy?:
@jrc said in RAID - the king of the storage landscape or legacy?:
@scottalanmiller said in RAID - the king of the storage landscape or legacy?:
@jrc said in RAID - the king of the storage landscape or legacy?:
Also, isn't RAIN basically an array of RAIDs ??
No, that would be Network RAID.
That how would you define RAIN? Wouldn't each node be a NAS of some sort, and more than likely that NAS would be configured with RAID, or am I missing something?
It depends. RAIN is a blanket term for a lot of things, unlike RAID which is quite specific. You could make a great argument that Network RAID is a member of the RAIN family.
But in general terms, if you use Network RAID (treating each node as a disk) it's not called RAIN.
RAIN is assumed to have nodal awareness. RAID treats all members as drives and can't tell what is a node, and what is a drive.
What type of system would be a good example of RAIN? Gluster? Ceph? or am I totally missing the boat?
Yes, Cluster, CEPH, SCRIBE, Exablox... all RAIN. Traditional RAIN by everyone's standards.
I'm familiar with Gluster and Ceph. Exablox is not open source...
SCRIBE is done by @scale -- so it's not open source, right?
Correct, it is closed source.
-
@pchiodo said in RAID - the king of the storage landscape or legacy?:
Well, I think you guys really RAIN'd on this guys parade. Good work.
You were hoping for a RAIDing party?
-
@scottalanmiller With this group? You're just spinning in place.
-
@pchiodo said in RAID - the king of the storage landscape or legacy?:
@scottalanmiller With this group? You're just spinning in place.
Oh... that's a good one.
-
@scottalanmiller said in RAID - the king of the storage landscape or legacy?:
@pchiodo said in RAID - the king of the storage landscape or legacy?:
Well, I think you guys really RAIN'd on this guys parade. Good work.
You were hoping for a RAIDing party?
~Grabs Knife of Slicing. (Knife made from computer case, +2 bleeding damage)
~Grabs Winchester Shield (+1 defense, -255 data retention).
~Grabs Umbrella (+50 resistance to water, -50 resistance to lightning).
~Grabs Book of SPELLS. (Stupidly Powerful Extra Long Ludicrous Sayings, +25 Magic Damage)There, I'm ready.
