Re: Throughput reality (12MB/s) vs hdparm (73MB/s)

Hi Andy,

12MB/s smells a lot like there's a 100Mb/s bottleneck somewhere.
Check the client and server adapters with ethtool to verify that
the links are at 1000Mb/s full duplex.  You also might try connecting
the client and server directly with a cat-6 cable.  If they're both
truly GbE, they should do auto crossover.

What aoe driver version are you using?

Cheers,

Sam

> Hi all,
> 
> I'm new to aoe and am having some problems with throughput.  Hdparm -t
> gives me ~73MB/S which is great.  But real world file copying is only
> getting ~12MB/S which isn't so great.
> 
> The link has the capability for throughput over 110MB/s (FTP) and there
> is little other traffic going on (network idle is ~250bytes/sec).
> 
> Ive read the coraid EtherDrive FAQ and others for background.  Some
> history on this mailing list have exactly this performance.  There is
> some suggestion that this performance is normal and that higher
> throughput's can be obtained by striping over multiple vblade's, but I'm
> not sure..
> 
> I'm using the following setup -
> ---------------------------------------------------------
> Server:
> AMD64 Ubuntu Linux - Gutsy
> aoetools 11-1.2
> RAID 5 SATA2
> 
> Client:
> AMD64 Ubuntu Linux Edgy
> aoetools 11-1.2
> U320 SCSI
> 
> Commands I used:
> Server (its an lvm partition):
>  vblade 1 1 eth0 /dev/lvmdev/blade 
> Client : 
>  aoediscover
>  aoestat {yields: e1.1        53.687GB   eth0 up}
>  mkfs -t reiserfs /dev/etherd/e1.1
>  mount /dev/etherd/e1.1 /srv/blade
>  time cp /usr/local/src/testfile /srv/blade
> ---------------------------------------------------------
> 
> Any advice? it ~12MB/S normal for single vblade throughput on local Gbit
> switch?
> 
> Cheers,
> Andy.
> 
> 
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