Hi Everyone, I started a social networking site and I am getting ready to go live next week. I have limited fund as I am not funded yet (although hopefully soon). I have an extra Mac Pro (I know, how can I possibly call a Mac Pro dual 2.8 quad core with 16gb RAM extra). So Mac Pro quad Core, 16gb RAM, 4 x 1tb RAID level Seagate drives. I was going to load CentOS 5.4 on it, web, mysql etc, etc. This is really the only box I have that would handle the site it it takes off and then I would need to add more hardware and most hosting to RackSpace or something. My question is about initial setup. The 4 x 1TB drives. How to set this up for I have some protection? RAID 0+1? (striped + mirrored) I would end up with 2TB useable space. RAID 5? so what one is a hot spare? 3TB useable space? What about striping the 4 1TB and mirroring that to a 4 x 1tb External drive enclosure? I want to be sure the data is protected, but machine resources and money are limited. Thoughts are appreciated!
If you want speed, use RAID 10. Neil -- Neil Aggarwal, (281)846-8957, http://www.JAMMConsulting.com CentOS 5.4 KVM VPS $55/mo, no setup fee, no contract, dedicated 64bit CPU 1GB dedicated RAM, 40GB RAID storage, 500GB/mo premium BW, Zero downtime> -----Original Message----- > From: centos-bounces at centos.org > [mailto:centos-bounces at centos.org] On Behalf Of ML > Sent: Thursday, October 29, 2009 12:57 PM > To: CentOS mailing list > Subject: [CentOS] Infrastructure HELP! > > Hi Everyone, > > I started a social networking site and I am getting ready to go live > next week. I have limited fund as I am not funded yet (although > hopefully soon). > > I have an extra Mac Pro (I know, how can I possibly call a Mac Pro > dual 2.8 quad core with 16gb RAM extra). So Mac Pro quad Core, 16gb > RAM, 4 x 1tb RAID level Seagate drives. I was going to load > CentOS 5.4 > on it, web, mysql etc, etc. This is really the only box I have that > would handle the site it it takes off and then I would need to add > more hardware and most hosting to RackSpace or something. > > My question is about initial setup. The 4 x 1TB drives. How to set > this up for I have some protection? > > RAID 0+1? (striped + mirrored) I would end up with 2TB useable space. > > RAID 5? so what one is a hot spare? 3TB useable space? > > What about striping the 4 1TB and mirroring that to a 4 x 1tb > External > drive enclosure? > > I want to be sure the data is protected, but machine resources and > money are limited. > > Thoughts are appreciated! > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos
On Thu, 29 Oct 2009, ML wrote:> My question is about initial setup. The 4 x 1TB drives. How to set > this up for I have some protection? > > RAID 0+1? (striped + mirrored) I would end up with 2TB useable space. > > RAID 5? so what one is a hot spare? 3TB useable space? > > What about striping the 4 1TB and mirroring that to a 4 x 1tb External > drive enclosure?Plan for drives going out but keeping the site operational. Also remember that RAID isn't a backup. RAID 5 is enticing because you get more usable space out of your drives, but you have to be sure you'll only lose one drive at a time and can get a replacement drive in there and sync'ed up before you lose a 2nd one... If the drives were made by the same manufacturer and were bought at about the same time you might easily lose 2 or more, blowing up your array. Go with RAID 1+0 (mirroring + striping) and you can potentially lose up to 1/2 of your drives and keep running. That's assuming you lose the correct 1/2... If you lose two drives in the same mirror you still go down. Combine the above with a good backup strategy. Backup software has been discussed on this list quite recently so look back a few days or weeks and you'll find some good links. Practice and document doing restores so that you know how to do them quickly without error when the pressure's on. Some of the backup software names/links I gleaned from this list recently: www.mondorescue.org www.nongnu.org/duplicity (de-dupe, S3) www.nongnu.org/storebackup (de-dupe) amanda backuppc (sourceforge) (rpm in epel) www.backula.org (de-dupe) -- Curt Mills, WE7U hacker at fluke dot com Senior Methods Engineer/SysAdmin "Lotto: A tax on people who are bad at math." -- unknown "Windows: Microsoft's tax on computer illiterates." -- WE7U "The world DOES revolve around me: I picked the coordinate system!" Please be advised that this email may contain confidential information. If you are not the intended recipient, please do not read, copy or re-transmit this email. If you have received this email in error, please notify us by email by replying to the sender and by telephone (call us collect at +1 202-828-0850) and delete this message and any attachments. Thank you in advance for your cooperation and assistance. In addition, Danaher and its subsidiaries disclaim that the content of this email constitutes an offer to enter into, or the acceptance of, any contract or agreement or any amendment thereto; provided that the foregoing disclaimer does not invalidate the binding effect of any digital or other electronic reproduction of a manual signature that is included in any attachment to this email.
ML schrieb:> Hi Everyone, > > I want to be sure the data is protected, but machine resources and > money are limited. >Why don't you rent a VPS for the time being and rsync the file+data to your MacPro, where you can use TimeMachine to create further backups? Rainer