Follow up: I wrote a small Python script for evaluating the object to placement mapping's quality. I'm using a Chi-Squared statistical hypothesis test. Here is the script and also an example output for a few rados benchmark writes: > https://gist.github.com/daniel-j-h/d7d87dfe5de3c5bbfd0f Maybe you're interested in checking your cluster's mapping quality. More on the method and the output's meaning: > https://en.wikipedia.org/wiki/Chi-squared_test > http://en.wikipedia.org/wiki/P-value I'm still interested in a cluster-specific mapping as discussed in the other mailinglist posts. Cheers, Daniel -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
