I need to retrieve a few metric from my service server to benchmark another stroage solution. There are various options are provied by benchmark program(I choosed FIO,http://freecode.com/projects/fio). I could easily set up io pattern with it. But I couldn’t know how can i retrive real service’s metric to set up benchmark varible as realistic as possible.
for exmaple, i need to setup,
- random/sequential read/write ratio file size and distribution of each
- file size (if i could possible, random/sequential read/write ratio for each size)
- random access’s revisitaion ratio(might affect random access performance)
I’m currently testing ceph(http://ceph.com/), At least above metrics seems significant impact for those kind of storage from my study. How can i retrieve those value?
collectcl(http://collectl.sourceforge.net/) seemed promssing. But couldn’t figure out any further than read/write ratio. I couldn’f figure out except those thing. I really like to know how other people decide those benchmark variables.
Thanks in advance.