On Fri, Apr 29, 2011 at 10:54 AM, Les Mikesell <lesmikesell AT gmail DOT com>
wrote:
> On 4/29/2011 10:18 AM, Richard Shaw wrote:
>> I was recently sub-contracted to setup BackupPC for a business and
>> everything's fine so far but I was hoping to make some improvements.
>>
>> 1. On the server, which is a Xeon Quad 2GHz machine, I've got a rsync
>> over ssh dump that's been running for over 12 hours which is about
>> 300GB into a 800GB share. Perl seems to be the bottleneck on the
>> server and ssh is only using about 20-30% of one core on the client so
>> I'm assuming changing the ssh cypher will not help.
>>
>> Is there any tips or tricks I can apply in this case?
>
> Is this the 1st or 2nd full? It may improve by itself if you have the
> --checksum-seed=32761 option set so the server won't have to recompute
> the values. You could also look at the content and how it changes. Big
> files with small changes are bad, since the system has to reconstruct
> the copy with a mix of decompressing the old version and the changes
> from the network. Maybe there is something that you can exclude or
> handle some other way. Also, remember that incrementals without levels
> copy everything changed since the previous full and with levels have to
> do extra server-side work to merge the comparison view.
It's the 1st full so I guess that wouldn't help... Is that a safe
option to keep using all the time?
The files are commercial animation files so I'm guessing they are
large. I was looking for a utility like 'du' except for file size
distribution but didn't really find anything. They can't really be
excluded since they are the point of the backup...
>> 2. Can more than one email address be added to the configuration for
>> the EMailAdminUserName?
>
> I think it should work to use a comma separated list, but an alternative
> would be an alias in the mail system.
I'll give it a try and see if it works on my test server (virtualbox)
and report back.
>> 3. I have more than one share that needs to be backed up from the
>> client but they want a different backup schedule for 1 of the shares.
>> Am I going to have to setup fake/virtual hosts to accomplish this?
>
> Yes. But make sure they understand that the pooling in backuppc means
> they wouldn't actually store more copies (unless they change) of files
> if they run all the shares at the more frequent schedule.
That shouldn't be a problem, these are different directories with
dissimilar files, so not a pooling opportunity.
>> The host->ip resolution is being handled by a hosts file so I could
>> add aliases there so BackupPC would treat them as separate clients,
>> right?
>
> Yes, but you could also use the ClientAlias setting in backuppc itself
> to make different host configurations point to the same real name or IP.
Can you point me to some documentation on how to use ClientAlias?
Surprisingly googling "backuppc clientalias" didn't seem to get me
what I needed. And I found no instances of that in the basic
documentation.
Thanks,
Richard
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