In the 0.8 config, log.dir is now log.dirs. It looks like the singular
log.dir is still supported, but under the covers the property is log.dirs.
I'm curious, does this take a comma separated list of directories? The new
config page just says:
"The directories in which the log data is kept"
Also, how does kafka handle multiple directories? Does it treat each
directory as a separate replica partition, or what?