I'm going to be setting up and hosting a high-profile wordpress blog. It'll probably get around 800.000 pagehits per month. The client has been asking about Peak Capacity, Throughput and whatnot and I'm honestly am not sure what to tell him.
So far I've been maintaining a 1and1 windows 2003 dedicated server with about 20 websites, but none which comes close to that amount of traffic.
My plan is to go for a Linux box with the following specs:
CPU: Opteron 1218 HE
CPU Details: 2 x 2.6 GHz
RAM:4 GB RAM
Hard Disks: 2 x 400 GB (RAID 1 Software)
Can anyone help or recommend where to start to eventually be able to decently answer my clients questions?
Only to add to what cristibighea has said - stay AWAY from 1&1 - if your client is having a popular blog site, then you definitely want to recommend a half-decent provider with good uptime and connectivity.
A 100Mbps uplink or 1Gbps uplink port which is metered would serve the server well with throughput depending on the data-type, visitor location and server location in relation the bulk of the hit region.
RAM - as much as you can afford really - it'll ensure the site is responsive enough at peak periods.
HDD / RAID - SATAII drives or SCSI drives (depending on budget), and definitely a hardware RAID card to handle drive redundancy.