[Mageia-sysadm] [council] Re: A new server to replace rabbit.mageia.org

Wed Jul 11 18:29:11 CEST 2012

On Mon, 09 Jul 2012, Thomas Backlund wrote:
+
+> 05.07.2012 18:34, Damien Lallement skrev:> Here comes a new
+> configuration with all remarks taken in account:
+> >
+> > FYI, we had:
+> > http://www.online.net/serveur-dedie/offre-dedibox-professionnel-dell.xhtml
+> > The bad points of the server we had were:
+> > - "small" and old CPU as it was a "green" and old server
+> > - big IO trouble as HDD are in SATA only
+> > The good points were:
+> > - 16 GB of RAM
+> > - 2x2TB of HDD
+> > - HW raid
+> >
+> > I made a NEW configuration with a Dell PowerEdge R320 and all your
+> remarks:
+> > - CPU: Intel Xeon E5-2407 2.20GHz, 10M, 6.4GT/s, No Turbo, 4C, 80W
+> > Here is a link to compare the actual CPU of rabbit and the new one:
+> > http://ark.intel.com/compare/43233,52275,64614
+> 
+> So we gained 340 MHz / core if we ignore Turbo mode, but we also
+> lost hyperthreading... so compressing livecds will most likely
+> be any faster.
+> 
+> > - RAM: 32GB DDR3 1333MHz (16GB on the previous proposal)
+> 
+> OK
+> 
+> > - HDD controller: PERC H710 RAID Controller, 512MB NV Cache, (HW RAID)
+> 
+> Nice controller.
+> 
+> > - HDD: 2 x 1TB Near-Line SAS 6Gbps, 3"5 7.2k (in RAID 1)
+> 
+> Back to sata speed disks
+
+Problem is that SAS disks are very expensive. So it increases the price
+a lot.
+
+> 
+> > - iDRAC7 Express (not on the previous proposal)
+> 
+> Nice
+> 
+> > - Dual Hot Plug Power Supplies 350W (not on the previous proposal)
+> 
+> Nice
+> 
+> > Cost: ~2800 € without taxes*
+> >
+> > * I asked a reduction to Dell. Stay tuned!
+> > So, WDYT about this NEW proposal?
+> >
+> 
+> I'd rather take the old one then, add 2x300GB in raid1 and 2x300 in
+> raid0, and add 32GB ram to that one...
+
+The old one (R210 II) with 4*300GB and 32GB of ram costs 3 695 euros
+(without tax).
+
+It's 420 euros for each 300GB disk, so we have 1680 euros of disks.
+600 GB disks are at 510 euros each. Unfortunatly 300GB disks are not a
+lot cheaper than 600GB ones.
+
+Switching from 16GB (4*4GB) to 32GB (4*8GB) of ram adds 1223 euros.
+
+On R320, 16GB RDIMM costs 295 euros. Maybe if we have 32GB of ram, we
+can use 16GB for tmpfs to store temporary build files, and it can
+compensate not having SAS disks ? Or 48 or 64GB ?
+
+> 
+> 
+> Or as a different proposal...
+> 
+> What if we make ecosse our new rabbit ?
+> 
+> It has dual Xeon 5000 series Quad core running at 2.66 / core
+> (so 8 real cores available)
+> 
+> It currently has 8GB of RAM
+> 
+> We would need to buy:
+> - a new disk controller (as the current integrated ESB2 one sucks)
+> - 2 >= 300GB SATA disks for system, frozen repo and readybuilt isos
+> - 1 ~250GB SATA SSD for iso builds
+> - maybe some more RAM
+> 
+> The cash saved could be used instead for the replacement >= jonund-class
+> buildhost.
+> 
+> Would that work ?
+
+Problem with this solution is that bios on ecosse seems to be buggy, so
+we are not sure that adding a new disk controller will work. So spending
+some money to buy a good disk controller can be risky.
+
+