Les,
I am not too distressed by the processor usage, as this machine is dedicated to baqckuppc, but I am trying to workout why the network utilisation is so low. I would expect that if two machines had a gigabit connection then I should be able to get throughput up to around 100mb/s (ish) yet I am seeing a max of around 12MB/s, sometimes it just hovers at about 300kb/s.... I would expect that when the file listing is sent, for there to be a heavy load on the network at that time, and then some heavy cpu work, and then more load on the network as it hits files that it needs to backup.....
Regards,
Jamie Myers
| Les Mikesell <[EMAIL PROTECTED]>
10/03/2006 03:39 AM |
|
On Thu, 2006-03-09 at 01:23, [EMAIL PROTECTED] wrote:
> I have a dual core AMD Athlon 64 processor and when backups are taking
> place the processor usage generally sits at 100% on both cores (When
> multiple machines are being backed up), if not at 100% then generally
> very close to it....
>
> At the same time, 3 hosts being backed up, two of which have gigabit
> links to the backuppc, and the other with a 100Mbit connect, and on
> the backuppc I am seeing a maximum network throughput of 13MB/s, but
> generally I'm getting 4mb/s sometimes as little at 300bps.... when all
> three hosts are being backed up[... this seems AWFLY slow..
>
> I'm using Ubuntu 5.10, backing up via Rsyncd, all hosts being backed
> up are windows using Cygwin-RsyncD, all machines have 2GB memory and
> very fast cpu.... Memory usage on all the machines involved is not
> excessive, infact it's relatively low....
When you run rsync/rsyncd, the client sends it's entire directory
listing first, then the backuppc server wades through its last
full making the comparisons. Unless a lot of files have
changed, this won't take much bandwidth but is still a lot of
work. You might look at the --checksum-seed option to reduce
the computation.
--
Les Mikesell
[EMAIL PROTECTED]
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