[mythtv-users] Is there a distributed filesystem available?

[Debabrata Banerjee]

Rebuild a raid 5, lets say 6 hours. 6 hours > just put in a new disk
Expand a raid 5, let's say 20 hours to restripe > just put in a new disk.
FS corruption on a raid5, all your data gone, system doesn't work
2+ disks dead on a raid5, all your data gone, system doesn't work.

----- Original Message ----- 
From: "Chris Henderson" <jchendo at gmail.com>
> But i dont understand. Please exlpain. You say you want a fault tolerant
> files system, doesnt Raid 5 give you that?
>
> And for raid 5 being slow, umm if you cheap out and use the software raid 
> 5,
> then YEA its a bit slower, but i would not think you would see it in this
> enviroment. Unless of course you are recording muiltpul HD streams (3 or
> more) and streaming out at the same time.
>
> If you go with a Hardware Raid card or board there *should* be no
> differeance between what normal and RAID. Infact you *should* get better
> read/write performance. (not exactly true, happens more with STRIPED
> arrays.)
>
> You could make a SAN or more likly a NAS (Network Attached Storage) out of 
> a
> slave backend.
> What i am trying to build is as follows. (cash strapped. cant get the 
> drives
> ATM)
>
> P3 or 4 or AMD (it doesnt matter for this)
> 2GB ram (over kill)
> 1 x 80GB HDD for boot and swap
> 6 x 200GB HDD in Raid 5 Array (this will include / )
> Gbit lan
>
> THis should make a NAS with 1TB of storage. As it is fault redundant I 
> will
> put everything on here and the Master BE will dump everything on it. I got
> given a Gbit 24 port switch so i will use that to connect, that should 
> make
> it so there is no problem for the Slave Backend to stream the required 
> data.
>
> To that each frontend and backend will have a cron job to backup the DB at
> some stage each day and each of them will have an image on the
> SlaveBackend/NAS. I want to do lowpowered EpiaM 1300 frontends in the 
> future
> and would like them to net boot. These images will also be stored on the
> SlaveBackend/NAS
>
> Please let me know what you see wrong with this.
>
> I dont know of any files system that will eliminate corruptions etc.
> even in Large enterprise thisis worried over but, i dont know of anythig
> they do to stop it.
>
> Bang for Buck i dont know of a better way.
>
> CH
>


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