Re: Recommended HW on AWS EC2 - vertical vs horizontal scaling

[aealexsandrov]

Hi,

Left the list with some useful articles links here
http://apache-ignite-users.70518.x6.nabble.com/Slow-SQL-query-uses-only-a-single-CPU-td23553.html

BR,
Andrei



--
Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Re: Recommended HW on AWS EC2 - vertical vs horizontal scaling

[eugene miretsky]

Thanks Andrei,

For user case, please see my email ("Data modeling for segmenting a huge
data set: precomputing vs real time computations").

I think our main confusion right now is trying to understand how exactly
SQL queries work (when memory is moved to heap, when/how is H2 used, how
the reduce step is performed, etc.), because of that we don't really
understand when data is moved between heap, off-heap and disk, and hence
have hard time sizing it properly (I have crushed Ignite many times during
testing).  There is already a simialr email thread ("How much heap to
allocate").

We also cannot get some of our OLAP queries to execute in parallel (see
"Slow SQL query uses only a single CPU"), which again makes it harder to
size the HW (no point using huge instances if only a single CPU is going to
be used per query).

Cheers,
Eugene


Furher

On Fri, Aug 24, 2018 at 6:16 AM, aealexsandrov 
wrote:

> Hi,
>
> Ignite doesn't have such kind of benchmarks because they are very specific
> for every case and setup.
>
> However, exists several common tips:
>
> 1)In case if you will use EBS then try to avoid the NVMe. It is fast but
> looks like doesn't provide the guarantees for saving your data. We face the
> corruption of the working directory on this type of devices.
> 2)To get the best performance you should have enough of RAM to store your
> data in Ignite off-heap
> 3)Volume Type - EBS Provisioned IOPS SSD (io1)
>
> I suggest using x1 or x1e instances from
> https://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/
> memory-optimized-instances.html
> list.
>
> Your choice will depend on your case and expectations. But for example:
>
> x1e.32xlarge
> ESB = io1
> 2 disks with 2 TB each
>
> It will provide to the capability to store your data in the memory in one
> node and the disk speed will be around 14000MB/SEC.
>
> Is it possible to describe your case in more detail?
>
> BR,
> Andrei
>
>
>
> --
> Sent from: http://apache-ignite-users.70518.x6.nabble.com/
>

Re: Recommended HW on AWS EC2 - vertical vs horizontal scaling

[aealexsandrov]

Hi,

Ignite doesn't have such kind of benchmarks because they are very specific
for every case and setup.

However, exists several common tips:

1)In case if you will use EBS then try to avoid the NVMe. It is fast but
looks like doesn't provide the guarantees for saving your data. We face the
corruption of the working directory on this type of devices.  
2)To get the best performance you should have enough of RAM to store your
data in Ignite off-heap
3)Volume Type - EBS Provisioned IOPS SSD (io1)

I suggest using x1 or x1e instances from
https://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/memory-optimized-instances.html
list.

Your choice will depend on your case and expectations. But for example:

x1e.32xlarge
ESB = io1
2 disks with 2 TB each

It will provide to the capability to store your data in the memory in one
node and the disk speed will be around 14000MB/SEC.

Is it possible to describe your case in more detail?

BR,
Andrei



--
Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Recommended HW on AWS EC2 - vertical vs horizontal scaling

[eugene miretsky]

Hello,

We are looking to set up a fairly large (a few TB) cluster in AWS for OLAP
and transactional use cases.


   1. Are there any Ignite benchmarks on horizontally vs vertical scaling?
   2. What EC2 instances are other people using in prod? (I am assuming
   that one of the memory optimized
   

   )


Cheers,
Eugene