Tag Archives: performance

Analyzing I/O performance in Linux

Monitoring and analyzing performance is an important task for any sysadmin. Disk I/O bottlenecks can bring applications to a crawl. What are IOPS?  Should I use SATA, SAS, or FC? How many spindles do I need? What RAID level should I use? Is my system read or write heavy? These are common questions for anyone […]

Disk Performance

So what kind of performance should people expect from a disk or raid? How long should it take to create 100G file? time dd if=/dev/zero of=mako1 bs=65536 count=163840 A customer of ours is using this to create a 10G file and its taking about 20 minutes to create the file on a 12 drive raid […]