Hi,
I am currently benchmarking Cassandra with three machines, and on each
machine I am seeing an unbalanced distribution of data among the data
directories (1 per disk).
I am concerned that this affects my write performance, is there anything
that I can make the distribution be more even? Would r
Hi,
I am currently performing benchmarks on Cassandra. Independently from each
other I am seeing ~100k writes/sec and ~50k reads/sec. When I read and
write at the same time, writing drops down to ~1000 writes/sec and reading
stays roughly the same.
The heap used is the same as when only reading,
mmediate guess: your transaction logs are on the same media as your
> sstables and your OS prioritizes read requests.
>
> -Jeff
>
> > On Jul 23, 2015, at 2:51 PM, Soerian Lieve wrote:
> >
> > Hi,
> >
> > I am currently performing benchmarks on Cassandra.
rites_starved value). If you’re one CFQ,
> definitely ditch it.
>
> -Jeff
>
> On Jul 23, 2015, at 4:17 PM, Soerian Lieve wrote:
>
> I set up RAID0 after experiencing highly imbalanced disk usage with a JBOD
> setup so my transaction logs are indeed on the same media as the ss
>
> On Fri, Jul 24, 2015 at 1:55 PM, Soerian Lieve
> wrote:
>
>> I was on CFQ so I changed it to noop. The problem still persisted
>> however. Do you have any other ideas?
>>
>> On Thu, Jul 23, 2015 at 5:00 PM, Jeff Ferland
>> wrote:
>>
>&g
n Tue, Jul 28, 2015 at 4:49 PM, Soerian Lieve
> wrote:
>
>> I did already set that to the number of cores of the machines (24), but
>> it made no difference.
>>
>
> I continue to suggest that you file a JIRA ticket... I feel you have done
> sufficient community
