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[Veritas-bu] Backing up a SUN cluster with a private backup n etwork
2002-08-19 11:45:06
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You're not using a floating IP address so identifying the currently active
system would be difficult.
I can think of some methods - none of them particularly elegant.
1. Use a cron job associated with the active service and do a user-backup to
NB from your active cluster member. Build a receiving class that'll accept
backups from either host. Your script can query to see if it is the active
member and send the data if it is or terminate without if not.
2. Use a script like above on the active server to trigger bpsched with
appropriate options to initiate an on-demand immediate backup, ie: bpsched
-IB -class <classname> -client <clientname> . Background this as otherwise
it runs in the foreground.
3. Use an pre-schedule job (bpstart_notify) on both servers and backup up
both servers normally. The preschedule job checks the server for the active
service and errors with a non-zero return code if the service is not there.
The backup job will die for the non-zero return code. The problem is now
you have a daily expected error and that's the top of the slipper slope that
leads to not responding to errors at all.
Well there's three. I think the first is as good as any of them althrough
you'll have to remember that this particular class is being client driven
rather than master scheduled.
-M
-----Original Message-----
From: Patrick O'Hagan [mailto:patrick.ohagan AT morse DOT com]
Sent: Monday, August 19, 2002 5:09 AM
To: 'veritas-bu AT mailman.eng.auburn DOT edu'
Subject: [Veritas-bu] Backing up a SUN cluster with a private backup
network
Hi,
I require to backup a SUN cluster (active/passive) with a dedicated backup
network BUT there will be no floating IP address for the backup network.
Does anyone have any ideas of how to achieve this. (The problem being how do
I know which half of the cluster needs to be backed i.e. what hostname do I
direct the backup to)
The following solution has been suggested but I can't figure out how to
implement it using REQUIRED_INTERFACE -
1) Initiate backup from master server to cluster using the floating ip
address on the public network
2) Route backups over the private network back to the master
Note SUN PS have informed me that having a floating ip address for the
backup network is not an option ( reason - all resources in a sun cluster
are monitored and failure of the backup network would cause the
applications/database to failover)
Thanks Pat O'Hagan
_______________________________________________
Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
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<TITLE>RE: [Veritas-bu] Backing up a SUN cluster with a private backup =
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<P><FONT SIZE=3D2>You're not using a floating IP address so identifying =
the currently active system would be difficult.</FONT>
</P>
<P><FONT SIZE=3D2>I can think of some methods - none of them =
particularly elegant.</FONT>
</P>
<P><FONT SIZE=3D2>1. Use a cron job associated with the active service =
and do a user-backup to NB from your active cluster member. Build =
a receiving class that'll accept backups from either host. Your =
script can query to see if it is the active member and send the data if =
it is or terminate without if not.</FONT></P>
<P><FONT SIZE=3D2>2. Use a script like above on the active server to =
trigger bpsched with appropriate options to initiate an on-demand =
immediate backup, ie: bpsched -IB -class <classname> -client =
<clientname> . Background this as otherwise it runs in the =
foreground.</FONT></P>
<P><FONT SIZE=3D2>3. Use an pre-schedule job (bpstart_notify) on both =
servers and backup up both servers normally. The preschedule job =
checks the server for the active service and errors with a non-zero =
return code if the service is not there. The backup job will die =
for the non-zero return code. The problem is now you have a daily =
expected error and that's the top of the slipper slope that leads to =
not responding to errors at all.</FONT></P>
<P><FONT SIZE=3D2>Well there's three. I think the first is as =
good as any of them althrough you'll have to remember that this =
particular class is being client driven rather than master =
scheduled.</FONT></P>
<P><FONT SIZE=3D2>-M</FONT>
</P>
<P><FONT SIZE=3D2>-----Original Message-----</FONT>
<BR><FONT SIZE=3D2>From: Patrick O'Hagan [<A =
HREF=3D"mailto:patrick.ohagan AT morse DOT com">mailto:patrick.ohagan AT morse
DOT com=
</A>]</FONT>
<BR><FONT SIZE=3D2>Sent: Monday, August 19, 2002 5:09 AM</FONT>
<BR><FONT SIZE=3D2>To: 'veritas-bu AT mailman.eng.auburn DOT edu'</FONT>
<BR><FONT SIZE=3D2>Subject: [Veritas-bu] Backing up a SUN cluster with =
a private backup</FONT>
<BR><FONT SIZE=3D2>network</FONT>
</P>
<BR>
<P><FONT SIZE=3D2>Hi,</FONT>
</P>
<P><FONT SIZE=3D2>I require to backup a SUN cluster (active/passive) =
with a dedicated backup</FONT>
<BR><FONT SIZE=3D2>network BUT there will be no floating IP address for =
the backup network.</FONT>
<BR><FONT SIZE=3D2>Does anyone have any ideas of how to achieve this. =
(The problem being how do</FONT>
<BR><FONT SIZE=3D2>I know which half of the cluster needs to be backed =
i.e. what hostname do I</FONT>
<BR><FONT SIZE=3D2>direct the backup to)</FONT>
<BR><FONT SIZE=3D2> </FONT>
<BR><FONT SIZE=3D2>The following solution has been suggested but I =
can't figure out how to</FONT>
<BR><FONT SIZE=3D2>implement it using REQUIRED_INTERFACE - </FONT>
</P>
<P><FONT SIZE=3D2>1) Initiate backup from master server to cluster =
using the floating ip</FONT>
<BR><FONT SIZE=3D2>address on the public network</FONT>
<BR><FONT SIZE=3D2>2) Route backups over the private network back to =
the master</FONT>
</P>
<P><FONT SIZE=3D2>Note SUN PS have informed me that having a floating =
ip address for the</FONT>
<BR><FONT SIZE=3D2>backup network is not an option ( reason - all =
resources in a sun cluster</FONT>
<BR><FONT SIZE=3D2>are monitored and failure of the backup network =
would cause the</FONT>
<BR><FONT SIZE=3D2>applications/database to failover)</FONT>
</P>
<P><FONT SIZE=3D2>Thanks Pat O'Hagan</FONT>
<BR><FONT =
SIZE=3D2>_______________________________________________</FONT>
<BR><FONT SIZE=3D2>Veritas-bu maillist - =
Veritas-bu AT mailman.eng.auburn DOT edu</FONT>
<BR><FONT SIZE=3D2><A =
HREF=3D"http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu"; =
TARGET=3D"_blank">http://mailman.eng.auburn.edu/mailman/listinfo/veritas=
-bu</A></FONT>
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