We recently updated some lagging DB servers to new hardware. We installed some new Dell 6850 quad processor machines with 8GB ram, internal Perc raid mirror and external PowerVault 2200s storage. The hardware provisioning went fine with the exception of one odd matter, Dell PowerEdge 6850’s only run on 220volt AC!
All our existing PDU’s were 20 amp 110v and running at 70% utilization so even if the the servers worked on 110 they would put us over capacity. I just thought it was odd that the servers only ran on 220 when their non-rackmount counterparts, the 6800’s run on either 110 or 220. Dell says it’s due to space constraints on the new 6850’s, they don’t have the room to have a larger power supply.
Anyway, if you’re ordering 6850’s make sure you get dell to include a 16 amp 220v PDU and the proper power cables. Thanks to the quick response time of the guys at Savvis we had our power divation installed in 3 days, which made my life a lot easier.
As a side note, if you’re building a DB server that needs to really haul you should spend some serious time evaluating the fastest possible I/O configuration for your budget. Moving from raid5 to raid 1+0 and separating innodb storage from binlogs and temp tables has made our MySQL server at least 2-3 X faster.