cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Paul Prescod <>
Subject Re: Can Cassandra make real use of several DataFileDirectories?
Date Mon, 26 Apr 2010 19:38:22 GMT
2010/4/26 Roland Hänel <>:
> Ryan, I agree with you on the hot spots, however for the physical disk
> performance, even the worst case hot spot is not worse than RAID0: in a hot
> spot scenario, it might be that 90% of your reads go to one hard drive. But
> with RAID0, 100% of your reads will go to *all* hard drives.

RAID0 is designed specifically to improve performance (both latency
and bandwidth). I'm unclear about why you think it would decrease
importance. Perhaps you're thinking of another RAID type?

 Paul Prescod

View raw message