[RFC] Generic Migration
Francois Barre <francois.barre <at> gmail.com>
2006-03-01 12:59:28 GMT
I hope I won't bore you too much, but I had these ideas on my mind for
a couple of days now, so I just wanted to share them to you.
It is not a long document, so I guess it would take 10mins to read.
Sorry for my sometimes obscure english, ya know, I did the best I could...
I do welcome any comments, critics, suggestions, ... especially
because it's really a first draft here.
I of course would wish to implement what i'm speaking about, one day
ï»¿Generic reshape model for MD
The aim of this document is to present a concept of generic online md level
migration, such as raid1 to raid5, raid growth, ...
Regardless to implementation issues, the only migrations that are strictly
impossible are those where data (and replications) will not fit in the disk
at the end of the migration. For example, raid5 to raid1 with the same number
of disks is strictly impossible.
The aim of generic migration is to make each migration possible and easily
implementable (if not straitforward), including the ones that would imply