On Sat, Mar 13, 2010 at 09:18:09AM -0500, Alan Altmark wrote: > On Saturday, 03/13/2010 at 06:49 EST, Frank Pani <[email protected]> > wrote: > > > 1) Because the database will be 200-300GB, we can use LVM and have it > > available to mount RW on either system. We need to be very careful no to > > mount RW at the same time; else we risk destroying the data. In cases > > where customers are using VMWARE or Xen on distributed, you ensure this by > > using PaceMaker to tell the hypervisor to issue a STONITH to totally kill > > the primary machine. This ensures, that the filesystem will be RW only on > > the backup now. However! There is currently no capability on z/VM to > > allow PaceMaker (or any other software that I know of) to do this. > > For quite a while now we have had the System Management API (SMAPI). Write > a program on Linux that uses SMAPI to stop the Linux guest. Have > PaceMaker execute said program.
Such a program exists. It is called snipl and is available on developerWorks: http://www.ibm.com/developerworks/linux/linux390/snipl.html It's also included in some distributions. Also the Redbook "Achieving High Availability on Linux for System z with Linux-HA Release 2" might be of interest: http://www.redbooks.ibm.com/abstracts/sg247711.html ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
