Re: [LUG] De-bottlenecking

[Joseph Bennie <jay@xxxxxxxxxxx>]

On 15 Sep 2014, at 14:58, Tremayne, Steve <steven.tremayne@xxxxxxxxxxxxx> wrote:

Afternoon…

 

I’m currently transferring some files between my home built NAS (OpenMediaVault – basically Debian with a webserver running on a mdadm RAID 1) and my media PC (MythTV… based on Arch, using LVM (no RAID)) – all rotating drives.

 

Transferring via rsync seems to be getting about ~3MB/s (~30Mb/sec)… and for 1TB of media, that’ll take a while… which is fine as it’ll run over night.

 

 

However, I’m now curious as to what’s causing the bottleneck… the network (100Mb cabled through a firewall), the disks (SATAs), rsync over ssh, phase of the moon, etc…

The most probable reason is the firewall ( common home /small business level devices have a throughputs of between 7Mbs and 40Mbs when IPS , IDS are enabled) 

+ collisions on the network (can half the effective speed or worse)

 

So, I’m just asking as to what tools I can use to test the performance of each section…

Quick duckduckgo searches show that hdparm has the ability to do some tests… and iperf seems good for networking…

 

Suggestions?

 

Thanks,

 

Steve

 

 

 

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