On 2017-06-29 06:55 (-0700), Micha <mich...@fantasymail.de> wrote: 
> Hi,
> 
> I use a jbod setup (2 * 1TB) and the distribution is a little bit
> unequal on my three nodes:
> 270MB and 540MB
> 150 and 580
> 290 and 500
> 
> SStable size varies between 2GB and 130GB.
> 

You're switching between MB and GB, are these all in GB? 

> Is is possible to move sstables from one disk to another to balance the
> disk usage?

Is there a reason you feel it's required, other than being bothered by the fact 
that they're not equal? 

> Otherwise is a raid-0 setup the only option for a balanced disk usage?

Probably for most versions of cassandra (newer versions will attempt to choose 
JBOD disk based on token ranges, which is designed to protect against some 
other edge case bugs where you lose one disk and have to rebuild the whole node 
anyway). The real question is "why do you care, really?" - it'll spill over to 
the other drive when it needs space, and if it's not near capacity, it doesn't 
REALLY matter how full it is, right?



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