Re: How to RSYNC from eth1 on PDC-SRV to eth1 on BDC-SRV?

[Tim Conway]

The question is incongruous, in light of the title, but:
install the cards.
get them recognized and configured.
connect them, perhaps with a crossover cable (ethernet nullmodem).
configure them with addresses and netmask - since this is a point-to-point,
no external routability is needed - I suggest 192.168.0.0/31.
Name them, in /etc/hosts, as this isn't going to be dynamic data, nor
shared to other systems.  Don't name them the same as the primary hostname.
Make each the route to the other.
Example:  pdc has eth1 configured at 192.168.0.0, named pdc-eth1, and bdc
has eth1 configured at 192.168.0.1, named bdc-eth1, both with netmask
255.255.255.254.
On pdc - route add host bdc-eth1 eth1
On bdc - route add host pdc-eth1 eth1

Use the -eth1 hostname in the source or destination of the rsync
commandline.
Or, you can leave off the naming and just use raw IP addresses.

BTW:  You'll find that a crossover cable runs extremely fast, as there is
no resource sharing in the transport.  Your dedicated 100bT channel may
actually be FASTER than the shared gig-e.
Another caveat:  You mention advanced routing.  You may run into an issue
wherein your Gig-E interfaces tell each other that they're better routes to
the eth1 addresses.  THAT's an advanced routing thing, and I'm not certain
how to force system's IP stacks to segregate ARPing.

Good luck,

Tim Conway
Unix System Administration
Contractor - IBM Global Services
desk:3032734776
[EMAIL PROTECTED]



hours on Google.com searching, and I have not found an answer.  I am not
highly-skilled at setting up advanced routing, so I am not sure how to
accomplish this task and do not know if it is even possible.  Any help
and advice would be greatly appreciated.

Travis L. Bean
Systems Administrator
Bio-Logic Aqua Technologies
Grants Pass, OR - United States

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How to RSYNC from eth1 on PDC-SRV to eth1 on BDC-SRV?

[Travis L. Bean]

I currently have my /home directory kept in sync between my primary and 
backup domain controllers by using rsync --archive --checksum --update 
--delete pdc-srv:/home/ bdc-srv:/home/.  I noticed that when this 
command is invoked, it tends to suck up the available bandwith to eth0 
during the duration that the pdc is sending a large amount of data 
packets to the bdc.  So what I would like to do is install a second 
1000BASE-T network adapter on both the pdc and bdc and link them 
together with a crossover cable.  Then when I invoke rsync, the data 
stream would only travel from eth1 on the pdc to eth1 on the bdc and not 
take up bandwidth on eth0.  Is this possible?   I have already spent 
hours on Google.com searching, and I have not found an answer.  I am not 
highly-skilled at setting up advanced routing, so I am not sure how to 
accomplish this task and do not know if it is even possible.  Any help 
and advice would be greatly appreciated. 

Travis L. Bean
Systems Administrator
Bio-Logic Aqua Technologies
Grants Pass, OR - United States
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