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Hello everyone ,
I Wonder if someone could give me good insights about ho the RAIN concept works in ISILON X410 Nodes & HD 400 Nodes.
am unclear about the how the RAIN works in nodes when for a instance (node failure , HDD failure ).
crklosterman
450 Posts
2
July 13th, 2018 07:00
RAIN? RAIN is a reference to an old Centera term, it has no relation to how Isilon protects data.
It stood for:
Redundant
Array
of
Independent
Nodes
So you would say that data on Centera was protected with RAID (within each node) + RAIN (vertically across nodes), with either CPM or CPP protection (Mirroring or Parity).
All of that said, data on Isilon is protected with Erasure coding. To learn more about erasure coding, look up Reed-Solomon and/or Erasure Coding. You might want to take an Isilon basic admin class to learn more.
https://en.wikipedia.org/wiki/Erasure_code
~Chris
Peter_Sero
1.2K Posts
0
July 23rd, 2018 09:00
In addition to Chris' explanation, you might find this white paper useful:
https://www.emc.com/collateral/hardware/white-papers/h10588-isilon-data-availability-protection-wp.pdf
-- Peter