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Posted to user@cassandra.apache.org by Romain Hardouin <ro...@yahoo.fr> on 2017/03/01 11:30:17 UTC

AWS NVMe i3 instances performances

Hi all,
AWS launched i3 instances few days ago*. NVMe SSDs seem very promising!
Did someone already benchmark an i3 with Cassandra? e.g. i2 vs i3If yes, with which OS and kernel version?Did you make any system tuning for NVMe? e.g. PCIe IRQ? etc.
We plan to make some benchmarks but Debian is not listed as a supported OS so we have to upgrade our kernel and see if it works :PHere is what we have in mind for the time being:* OS: Debian* Kernel: v4.9* IRQ: try several configurationsAlso I would like to compare performances between our Debian AMI and a standard AWS Linux AMI.
Thanks!
[*] https://aws.amazon.com/fr/blogs/aws/now-available-i3-instances-for-demanding-io-intensive-applications/

Re: AWS NVMe i3 instances performances

Posted by Romain Hardouin <ro...@yahoo.fr>.

Thanks for your feedback Daemeon!I'm a disappointed and I hope that some system settings will allow to leverage NVMe :-/What i3 instances did you benchmarked?Did you have a "preview access" to i3? Or was it available in a specific region before the announcement?
Best,Romain

Le Mercredi 1 mars 2017 17h44, daemeon reiydelle <da...@gmail.com> a écrit :

We did. Found that, even with (CentOS, Ubuntu both for application compatibility reasons) that there is somewhat less IO and better CPU throughput at the price point. At the time my optimization work for that client ended, Amazon was looking at the IO issue, as perhaps the frame configurations needed further optimization. this was 2 months ago. A very superficial (no kernel tuning) done last month seems to indicate the same tradeoffs. Testing was performed in both cases with C* stress tool and with CI test suites. Does this help?

.......

Daemeon C.M. Reiydelle
USA (+1) 415.501.0198
London (+44) (0) 20 8144 9872

On Wed, Mar 1, 2017 at 3:30 AM, Romain Hardouin <ro...@yahoo.fr> wrote:

Hi all,
AWS launched i3 instances few days ago*. NVMe SSDs seem very promising!
Did someone already benchmark an i3 with Cassandra? e.g. i2 vs i3If yes, with which OS and kernel version?Did you make any system tuning for NVMe? e.g. PCIe IRQ? etc.
We plan to make some benchmarks but Debian is not listed as a supported OS so we have to upgrade our kernel and see if it works :PHere is what we have in mind for the time being:* OS: Debian* Kernel: v4.9* IRQ: try several configurationsAlso I would like to compare performances between our Debian AMI and a standard AWS Linux AMI.
Thanks!
[*] https://aws.amazon.com/fr/ blogs/aws/now-available-i3- instances-for-demanding-io- intensive-applications/

Re: AWS NVMe i3 instances performances

Posted by daemeon reiydelle <da...@gmail.com>.

We did. Found that, even with (CentOS, Ubuntu both for application
compatibility reasons) that there is somewhat less IO and better CPU
throughput at the price point. At the time my optimization work for that
client ended, Amazon was looking at the IO issue, as perhaps the frame
configurations needed further optimization. this was 2 months ago. A very
superficial (no kernel tuning) done last month seems to indicate the same
tradeoffs. Testing was performed in both cases with C* stress tool and with
CI test suites. Does this help?

*.......*

*Daemeon C.M. ReiydelleUSA (+1) 415.501.0198London (+44) (0) 20 8144 9872*

On Wed, Mar 1, 2017 at 3:30 AM, Romain Hardouin <ro...@yahoo.fr> wrote:

> Hi all,
>
> AWS launched i3 instances few days ago*. NVMe SSDs seem very promising!
>
> Did someone already benchmark an i3 with Cassandra? e.g. i2 vs i3
> If yes, with which OS and kernel version?
> Did you make any system tuning for NVMe? e.g. PCIe IRQ? etc.
>
> We plan to make some benchmarks but Debian is not listed as a supported OS
> so we have to upgrade our kernel and see if it works :P
> Here is what we have in mind for the time being:
> * OS: Debian
> * Kernel: v4.9
> * IRQ: try several configurations
> Also I would like to compare performances between our Debian AMI and a
> standard AWS Linux AMI.
>
> Thanks!
>
> [*] https://aws.amazon.com/fr/blogs/aws/now-available-i3-
> instances-for-demanding-io-intensive-applications/
>
>
>