Arie,

Thanks a lot for your email

I will check about the mounting parameters with Infra Engineers. 

However my file limits is already increased to 64000  and swap is disabled 
on elasticsearch nodes.

I will change the mounting options and let you guys know the change in 
performance.

regards,

Asad

On Monday, 9 June 2014 09:37:52 UTC+9, Asad Mehmood wrote:
>
> Good day!
>
> Recently I started implementing log monitoring and analysis system using 
> graylog2, we will have around 12,000 message / second. Though in staging we 
> are not even near that number but the cluster is not stable.
>
> Sometimes ES discovery fails because either the PC is in I/O wait or there 
> are too many processes in each core. 
> I tried to tune the settings by one way or another the cluster finds a way 
> to fail, as for my setup there are some limitation for a a while to use 
> high speed I/O so I need to either stick with slow disks or divide the 
> setup in a way that recent logs remain in high speed disks and older are 
> moved to low performance cluster. I was hoping if someone can help me 
> formulate or calculate a formula to decide how many nodes I need for ES 
> cluster, graylog2-server, radio and Kafka.
>
> There is another problem with KAFKA input if i shutdown Kafka, zookeeper 
> or radio, the messages stop coming and I need to Terminate Kafka input and 
> Launch a new input.
> Also the message throughput while using KAFKA and Radio is far less than 
> using direct inputs with graylog2-benchmark tool.
>
> Current Setup
> 2 Nodes for Log Collector and Radio  (8 Gb, 2 Core Xeon )
> 1. Graylog2-server + graylog2-web (16 Gb, 4 Core Xeon )
> 1. Graylog2-server + elasticsearch (16 Gb, 4 Core Xeon )
> 3. Elasticsearch + Kafka Node (16 Gb, 4 Core Xeon )
>
> The message throughput in peak hours will be 12000 / second and to 
> implement this system in  production, the system needs to withstand stress 
> test of 20.000 message / second. 
>
> I will appreciate if anyone here can help me with formulating the 
> performance requirements by quantifying them.
>
>
> regards,
>
> Asad
>
>
>
>

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