Here, we use Cabletron Systems 6000 switches. The amanda-server and the
switch report that the amanda-server is up on a 100m fdx connection. I am
sure that the network itself is not the problem. I get backups of the
amanda-server to a budtool backup server at lightning speeds. Therefore, I
think the problem lies in my configuration.
As Mr. Hepworth mentioned, the le0 interface is the 10mbps interface. And I
know that the interface that my amanda-server is running on is called
'hme0'. Need I delete the 'le0' and 'local' network interfaces from the
amanda.conf and make one for 'hme0' ? I cannot find anyplace in the
amanda.conf that calls the functions:
> define interface local {
> comment "a local disk"
> use 1000 kbps
> }
>
> define interface le0 {
> comment "100 Mbps ethernet"
> use 4000 kbps
In the amanda.conf file, above these interface definitions, it says that
these are referred to by the disklist file. I assume then that the
interface to be used should be called in the dumptype? I don't see any
examples of such in the dumptype area of amanda.conf... And it also
mentions that:
-the valuse below are only samples (referring to the two above interface
definitions).
So, do I need to define them elsewhere as well?
Thanks again for the help!
Brandon Moro
Systems Administration, Unify Corporation
[EMAIL PROTECTED]
-----Original Message-----
From: Martin Hepworth [mailto:[EMAIL PROTECTED]]
Sent: Thursday, March 07, 2002 9:53 AM
To: Brandon Moro
Cc: [EMAIL PROTECTED]
Subject: Re: netusage, high or low?
Brandon
d'oh just read the whole email..
If your SUN is connected to a cisco switch make sure is actually running
at 100m fdx as alot of the older SUNs and Cisco have some wierd problem
with autonegotiate. I've also seen problems with Cisco's under high load
with SNMP turned on giving throughput problems.
If you do have problems 1) force the cisco and the SUN to 100 full
duplex (see www.unixadmin.net/howto/100FullHowto.html for the SUN). 2)
turn off snmp on the cisco.
--
martin
Brandon Moro wrote:
> Hello all!
>
> I am having some troubles with my AMANDA backups running too long. They
> often take 20+ hours,
> sometimes even breaking the 24-hour mark. The average amount of data I
get
> is only about 35GB.
>
> I am running my amanda-server on Solaris8, on a Sun Ultra5 400MHz with
256MB
> RAM, on a 100mbps
> connection. I have 2 DLT 7000 tape drives set up (though it very rarely
> roles over).
>
> Recently, I put a larger holding disk on the server and found that my run
> time was cut more than in half!
> However, I notice that I am still only getting a total of about 3GB an
hour.
> The data runs from the holding
> disk to tape at more like 6MB/s.
>
> We have a couple of other backup systems running on almost identical
> hardware that puts more than
> twice as much data to tape in slightly less time. So I guess what I am
> really asking is, am I missing
> something in the configuration of AMANDA sthat will allow better usage of
> the network connection?
>
> I found this in the amanda.conf file:
>
> netusage 4000 Kbps # maximum net bandwidth for Amanda, in KB per sec
> (blah blah)
>
> network interfaces
>
> ..... Attributes are:
> use - bandwidth above which amanda won't
> start
> backups using this interface.
> Note that if
> a single backup will take more
> than that,
> amanda won't try to make it run
> slower!
>
> define interface local {
> comment "a local disk"
> use 1000 kbps
> }
>
> define interface le0 {
> comment "100 Mbps ethernet"
> use 4000 kbps
>
>
> So, does this mean that if my dumpers are using 4000kbps, amanda won't
allow
> any more
> dumpers to start (even if the maximum number of allowed dumpers has not
been
> reached)?
>
> Can I improve performance by raising the netusage variable and "use"
> attribute to something
> more in line with the actual capacity of the amanda-server's network
> connection?
>
> Also, the network interface on the amanda-server is actually "hme0". Are
> the above simply
> examples? Should I create a new interface definition?
>
> Thanks for your help!
>
> Brandon Moro
> Systems Administration, Unify Corporation
> [EMAIL PROTECTED]
> ---------------------
>>From meanness first this Portsmouth Yankey rose, And still to meanness all
> his conduct flows. --Oppression, A poem by an American (Boston, 1765).
>
>
>
