Messages in this thread | | | From | Heinz Mauelshagen <> | Subject | Re: Where to put RAID (was Re: LVM etc... biggest thread in history) | Date | Mon, 17 Aug 1998 14:49:36 METDST |
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On 17 Aug 1998 Shawn Leas wrote:
> LVM is a physical to logical address remapping mechanism, that will do > software RAID, in which case there is an interface by which you can get > info about any given metadevice (LV). For instance, if you want to know > about the RAID personality of an LV, there are lv_ functions that will > give you this in the liblvm. > > As for separating RAID and LVM, this is a fundamental mistake IMHO, > because you are duplicating the most basic functionality of the LVM in the > RAID code, which is the physical to logical address remapping. It is the > foundation on which both principals are built! If ANY separation is to be > done, it would be making the remapping mechanism totally generic, and > building both RAID LVM modules on top of that, and that is just being > anal. (That is just my opinion, the rest should be fact) > > LVM is therefore the best place to put RAID, as RAID is just an LV > personality, so to speak.
I share Shawns point of view.
BTW: the use of MD is supported by LVM at this point in time to have the advantages of RAID > 0 by using MDs before LVM itself will integrate these RAID levels.
<SNIP> > I say, learn from Veritas.
That's it.
Heinz
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