Is "nodetool compact" what you are looking for ? Aaron
On 4 Apr 2011, at 05:35, Anurag Gujral wrote: > Hi Zhu, > I did not got that SSDs have read latency of 0.1ms.Since there > is only one data file > I would expect the read of any key to take 0.1ms may be I am missing something > please explain. > Thanks > Anurag > > On Sun, Apr 3, 2011 at 5:01 AM, Zhu Han <schumi....@gmail.com> wrote: > > best regards, > Zhu Han > > > > On Sun, Apr 3, 2011 at 9:21 AM, Anurag Gujral <anurag.guj...@gmail.com> wrote: > Hi All, > I have loaded data into cassandra using batch processing the > response times for reads are in the range of 0.8 ms but I am using SSDs. so > I expect the read times to be even faster. > > Does your working set fit in the memory? If so, SSD is not helpful to reduce > the latency. > > Every time I run compaction the latency numbers reduce to 0.3 to 0.4ms , is > there a way I can run compaction once with some parameters > so that i can get the same numbers 0.3 to 0.4 ms for reads. > Please note that I am not loading the data again. > > Thanks > Anurag > >
