service guard and backup network in linux

[Marko Sulentic]

Please can anyone say is service guard on linux support or not backup adapter managed by sg cluster software

thanks in advance

[Steven E. Protter]

Shalom,

Almost any application can be made High Availability by serviceguard.

Backup applications are ill suited for this.

1) You need two expensive backup devices so that either node can write backups. Tape device sharing doesn't work well and if the node that owns the tape drive is down what are you to do?
2) If the cluster fails over during a backup, part of it is on one tape drive, part on another. Its doubtful you could ever restore from that.

The bottom line is that it is suported, but its expensive in terms of hardware and in my opinion a waste of a SG license.

SEP

[Marko Sulentic]

Hello

sorry .... maybe i have write my question in wrong way.

I have service guard on HP-UX and i have monitored primary active network link and backup link in case primary link somehow failed.

Same configuration can not work for me on linux and information is a little bit confusing (documentation) so i dont know what is wrong in my config files

i have error like this

Checking cluster file: /opt/cmcluster/conf/sapci_clust.config
Checking nodes ... Done
Checking existing configuration ... Done
Gathering configuration information ... Done
Gathering configuration information ... Done
Gathering configuration information ..
Gathering storage information ..
Found 1 devices on node sap1ci
Found 1 devices on node sap2ci
Analysis of 2 devices should take approximately 1 seconds
0%----10%----20%----30%----40%----50%----60%----70%----80%----90%----100%
.....
Gathering Network Configuration ........... Done

Error: Network interface eth3 cannot be found on node sap1ci
Error: Network interface eth3 cannot be found on node sap2ci
cmcheckconf : Unable to reconcile configuration file /opt/cmcluster/conf/sapci_clust.config
with discovered configuration information.

[melvyn burnard]

you do not do the network config the same way.
To get the same effect as a standby lan, you need to use yhe built in Linix bonding, where you create a bond out of two eth? cards to end up with a bond? card. You then put the bond? device in as your network card. All documented in the managingserviceguard for Linux at:
http://docs.hp.com/en/ha#Serviceguard%20for%20Linux

see this thread as well:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=700395