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Time for the sysadmin math quiz: 10 servers running at 20% utilization. Two servers experience hardware failure. What's the resulting utilization per server?
by biot 15y ago
Time for the sysadmin math quiz:
10 servers running at 20% utilization. Two servers experience hardware failure. What's the resulting utilization per server?
4 servers running at 50% utilization. Two servers experience hardware failure. What's the resulting utilization per server?
Which approach affords greater redundancy and room for growth?
- jodrellblank 15y agoR610s are going to have dual PSUs, and they have redundant storage arrangements, so potentially they could experience hardware failure but no downtime. Chance of hardware failure in a modern server in a colo, assuming it's been stress tested to find DOA hardware before being put in production? Low. A quick spec on Dell's site, rough guess for the SSDs, the web servers are running around $4,000 each, or $4,500 with better warranty. Saving of 6 servers is >$20,000. It's entirely up to their funding and growth plans and risk acceptance if that's a useful saving, but if they were a ramen-profitable-is-goal-one startup, it would be months of runway.
- biot 15y agoThey apparently have two developer/sysadmins, so the $20K savings is less than a month of their salaries. For the redundancy and growth that affords, it's a no-brainer.