HAMMER and RAID question
dillon at apollo.backplane.com
Thu May 27 11:03:42 PDT 2010
:let me start this first by admitting that I know next to nothing about
:designing and implementing file systems. It is just that I've been
:naively thinking about things.
:It is my understanding that code has been added to reblock files during
:production use. Could this not also be the foundation of RAID-like
:functionality? If blocklists had a notion that a block needs to exist on
:at least two physical volumes, mirroring would already be there.
:Or is this too far away from what HAMMER does internally these days?
: Konrad Neuwirth
Theoretically the B-Tree could be used to list multiple copies of
a data block but it would really complicate the filesystem. HAMMER's
media structure is designed for replication across distinct copies
of the filesystem rather than trying to maintain redundancy within
a single copy of the filesystem.
<dillon at backplane.com>
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