Thank's for your hints and opinions! HA-Solutions was available but it's complex and that introduces more risks. We like stability and as simple as possible. Our problem was to setup clustered MQservers safe and stable. So our current solution will be two MQservers installed, but only one MQ running at a time. The MQ:s will use the same dasd, shared between the z/VM systems. The start script for MQ will include the vmcp LINK, dasd_configure ... 1 1 activating the logical volume and mount before starting MQ. The stop script will after stopping MQ, umount, make lv not available, dasd_configure .... 0 0 and vmcp det. We get rid of all NFS/HA complexity and risks and also got direct-disk-access performance.
___________________________________________ Tore Agblad Volvo Information Technology Infrastructure Mainframe Design & Development, Linux servers Dept 4352 DA1S SE-405 08, Gothenburg Sweden Telephone: +46-31-3233569 E-mail: [email protected] http://www.volvo.com/volvoit/global/en-gb/ -----Original Message----- From: Linux on 390 Port [mailto:[email protected]] On Behalf Of Rob van der Heij Sent: den 3 oktober 2010 10:19 To: [email protected] Subject: Re: cp send msg, trigger network start and disk switch On Sat, Oct 2, 2010 at 7:57 PM, Offer Baruch <[email protected]> wrote: > Then we used IBM System Automation to cluster both MQ and MB and dropped the > NFS solution... Should not be a surprise I think. Implemting HA on a low level requires that you do it for all the functions, not just the ones that your application requires. Doing it at applicaiton level means that you only cover the functions that you require (but you need to do it for each application). For example providing a HA data storage is pretty complicated. If you only need that for your web servers' static data (that does not change a lot) you may have easier options (like data duplication or accept a brief outage). The easiest obviously is the user-level: have the user to agree they will accept an outage for recovery. PS System z does an amazing job doing the hard part: provide high availability at a very low level so that your applications don't need to worry about it. | Rob ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/ ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
