seiji on The kivaloo data store

It even has dollar cost aware adjustment knobs:

  -S <storage:I/O cost ratio>
    Cost of one GB-month of storage divided by the cost of 10^6 I/Os.
    Used to control how aggressive the background log cleaner is.  Good
    values range from 0.08 (3 TB SATA with 100 random I/Os per second)
    up to 1600 (40 GB SSD with 25k random I/Os per second).  Setting
    -S 0 disables background log cleaning.  Defaults to 1.0 (which is a
    good value for Amazon EBS).

cpercivaOP15y

This is mostly for the benefit of SSDs. You want to be far more aggressive with cleaning on them.

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