On Sat, Jul 17, 2010 at 12:02 PM, Schubert Zhang <zson...@gmail.com> wrote:
> Hi Jonathan, > The 7k reads/s is very high, could you please make more explain about your > benchmark? > > 7000 reads/s makes average latency of each read operation only talks > 0.143ms. Consider 2 disks in the benchmark, it may be 0.286ms. > > But in most random read applications on very large dataset, OS cache and > Cassandra Key/Row cache is not so effective. So, I guess, maybe for a test > on large dataset (such as 1TB) , random reads, the result may not so good. Most of the data was hot in either the row/key cache, or in the OS file cache. The point was to benchmark Cassandra, not how fast the disk can seek. -Brandon
