[Moosefs-users] CGI interface charts + performance

[i- <it...@it...>]

Hi all,


I'm running a very simple cluster with 4 machines (1 master+meta+chunk, 
2 chunk-only, 1 client, all on the same gigabit network, all servers 
using SSDs) and I have 2 questions :

1/ in the server charts, my chunkservers all show a lot of bytes read 
(7M / s) though they are idle, no client is doing anything, how can this 
be possible ? I also noticed there are 2 colors in the charts : light 
green and dark green. The chart shows both dark and light green when I 
use the cluster and only light green when I don't. What are the colors for ?

2/ I'm using bonnie++ to do some basic performance testing and it shows 
the following performance :
- Write : ~40MB/s
- Rewrite : ~4MB/s
- Read : ~50MB/s

I guess the network latency is the bottleneck here because "iostats -m 
-x" shows small cpu load and small ssd usage on all machines. How can I 
verify that ?

Thank you very much!