Re: [BackupPC-users] NAS

Hi, Adam
38.3 MB/s seems a very high speed for old IDE disks through NFS
I'll expect that speed measuring the disk on the machine, not through the home LAN
Thanks for the command. I think of=/tmp/test may be wrong. Or not, I'm really no expert here.

I have a similar configuration (2x250 SATA1 local disks with lvm/mdadm), and I'm interested on NAS, not for backuppc (not for now, at least)
104857600 bytes (105 MB) copied, 10.8521 s, 9.7 MB/s (NFS mount)

I also have a running 100Mb LAN, shouldn't we start there? How to get a 1Gb LAN, that is, maybe the NAS speed are limited by that.

Forgive if I said something very stupid.
Regards
Luis

On Wed, Apr 7, 2010 at 12:48 AM, Adam Goryachev <mailinglists AT websitemanagers.com DOT au> wrote:

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Erik Hjertén wrote:
> Hi David
>
> I have a ReadyNAS Duo [X-RAID] with two 1TB disks in raid 0 (mirrored).
> I believe it's close to what you are looking at. It's mounted as NFS in
> my Ubuntu server. I use this set-up in my home for personal as well as
> business use. It has worked flawlessly since I installed it, I think it
> was in october last year. I backup several clients to it as well as the
> Ubuntu server it self. A full backup typically reaches a speed of 8
> MB/s, but I haven't made any effort to tune the setup, I just plug and
> pray ;-) . I also store some larger files on it and I stream video from
> it as well. Works great.
>
> What do you want to know?

I have one of these (ReadyNAS Duo) configured with RAID1 and 2 x 1TB
HDD's. My current problem is a lack of performance. I have two NFS
mounts from one machine, one if my very old NFS server (PC running linux
with IDE HDD's installed) which gets this result:
host:/mnt# dd if=/dev/zero of=/tmp/test bs=1024 count=102400
102400+0 records in
102400+0 records out
104857600 bytes (105 MB) copied, 2.74108 s, 38.3 MB/s

Meanwhile the same test with the netgear gets this:
host:/mnt# dd if=/dev/zero of=nas/media/test bs=1024 count=102400
102400+0 records in
102400+0 records out
104857600 bytes (105 MB) copied, 125.684 s, 834 kB/s

The test machine is connected via gigabit to the switch, and the netgear
+ old NFS are both also connected to the same switch. The maximum
performance I've seen with the netgear is around 2.5MB/s, but with samba
I've seen around 25MB/s so I'd love to know why I lose 10 times the
performance!

Any hints/tips on improving the performance would be greatly appreciated...

Thanks,
Adam

- --
Adam Goryachev
Website Managers
www.websitemanagers.com.au
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