With the RAID array I am planning to use RAID 5 so my data is still protected. My confusion is going with RAID striping (picking the right size). Also, Does the filesystem layout need to be specific when I do striping? If I am using 128k stripes, should I start my filesystem on 129k and end with max-(128+1k)?
On Sat, Jun 7, 2008 at 12:38 PM, Damon L. Chesser <[EMAIL PROTECTED]> wrote: > On Sat, 2008-06-07 at 11:15 -0500, Ron Johnson wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA1 > > > > On 06/07/08 07:27, Mag Gam wrote: > > > > > > I have a RAID controller with 256MB of on board cache and its connected > > > to 12 500GB SATA disks. I am planning to create 2 RAID groups (6 disks > > > each), but I don't know what is the optimal stripe size should be. > > > > That's very controler-specific. Read the manual. > > > > > Also, once I stripe on the RAID controller I am planning to use LVM. Is > > > striping a good idea? What should I consider for the filesystem? > > > > Striping is a GREAT idea IFF you want serious speed, but don't care > > about your data. If one of the disks goes flaky, *all* the data on > > the stripeset goes poof. > > > > So, *never* use striping on a production server!! Unless you hate > > the company, are vindictive, and are about to leave. > > > > Otherwise, use RAID 0, 10, 0+1 or 5. > > > > If you make huge RAID sets, I don't see the purpose of LVM. OTOH, > > for one, if you make a bad partition choice. With LVM, you can shrink > one and grow the other as needed. > > > if you make 6 mirror sets, use LVM to make a 6 "device" unit. > > > > Also, Damon is correct about booting. In fact, I'd have a separate > > boot device. > > > > Lastly, to what media are you going to back all this data up? How > > frequently? > > > > - -- > > Ron Johnson, Jr. > > Jefferson LA USA > > To back up Ron's input: > > http://www.linuxjunkies.org/html/LVM-HOWTO.html#s8 it is a bit dated, > but the info is good. > > > -- > Damon L. Chesser > [EMAIL PROTECTED] > http://www.linkedin.com/in/dchesser >
