Well you could do RAID 1 which is just mirroring. I don't think you need to do any raid 0 or raid 5 (striping) to get better performance. Also if you're using a 1U box, you just need 2 SATA drives internal and then NFS mount a drive from your SN for your backup copy...
> Date: Thu, 22 Sep 2011 17:18:55 +0100 > From: [email protected] > To: [email protected] > Subject: Re: Can we replace namenode machine with some other machine ? > > On 22/09/11 17:13, Michael Segel wrote: > > > > I agree w Steve except on one thing... > > > > RAID 5 Bad. RAID 10 (1+0) good. > > > > Sorry this goes back to my RDBMs days where RAID 5 will kill your > > performance and worse... > > > > sorry, I should have said RAID >=5. The main thing is you don't want the > NN data lost. ever >
