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OpenSolaris 2009.06 - man page for scalable_service (opensolaris section 5)

scalable_service(5)		    Sun Cluster Miscellaneous		      scalable_service(5)

       scalable_service - scalable resource types

       A  scalable  data service is one that takes advantage of the Sun Cluster networking facil-
       ity. Such a service is implemented as a resource type managed by the Resource  Group  Man-
       ager (RGM).

   Standard Resource Properties
       The standard resource properties Scalable, Network_resources_used, Port_list, Load_balanc-
       ing_policy, and Load_balancing_weights are common to all scalable resource types. See  the
       r_properties(5) man page for the syntax and description of these properties.

       Some  data services can run in either a scalable or non-scalable mode. These services per-
       mit you to specify a value of True or False for the Scalable property at the time that the
       resource  is  created. If this property is set to True on a resource, the resource is said
       to be in "scalable mode." The resource then must be contained in a scalable mode  resource
       group,  that  is, a group that can have its Maximum_primaries property set to a value that
       is greater than 1.

       For a data service that can only run in scalable mode, the Scalable property is implicitly
       True for resources of this type, and cannot be changed by the adminstrator.

       You can change the Load_balancing_weights and Port_list properties at any time, even while
       the resource is online. Network_resources_used and Load_balancing_policy are set when  the
       resource  is created, and you cannot edit these properties afterward. Depending on how the
       resource type is implemented, these properties might have default values, or you might  be
       required to provide values when you create the resource.

   Network Monitoring
       A scalable service instance running on a particular node or zone needs to be able to reply
       to clients over the public networks. The RGM automatically monitors the health of the pub-
       lic  networks on nodes or zones where scalable services are to run, and might bring down a
       scalable service instance on a particular node or zone if the public network becomes inac-
       cessible from that node or zone. If you disable monitoring on a scalable resource by using
       the clresource unmonitor command, these network checks are disabled.

   Resource Validatation
       When the Scalable resource property that is set to True is created  or  updated,  the  RGM
       validates  various resource properties and will reject the attempted update if these prop-
       erties are not configured correctly. Among the checks that are performed are  the  follow-

	   o	  The  Network_resources_used property must not be empty. This property must con-
		  tain the names of existing SharedAddress resources. Every node or zone that you
		  specify for the Nodelist property of the resource group that contains the scal-
		  able resource must appear in either the NetIfList property or  the  AuxNodeList
		  property of one of the SharedAddress resources.

		  Note	that  you can also specify a zone in a scalable resource's Nodelist prop-
		  erty. To specify a zone for Nodelist, use the following syntax:


		  nodename is the name of the node where zonename is  located.	zonename  is  the
		  name	of the zone that you want to include in Nodelist. For example, to specify
		  the non-global zone zone-1 which is located on the node phys-schost-1, type:


	   o	  A resource group that contains a scalable resource must have	its  RG_dependen-
		  cies property set to include the resource groups of all SharedAddress resources
		  listed in the scalable resource's Network_resources_used property.

	   o	  The Port_list property must not be empty. This property must contain a list  of
		  port	and  protocol  pairs, where protocol is tcp, tcp6, udp, or udp6. Possible
		  protocols that you can specify include tcp for only TCP IPv4, tcp6 for both TCP
		  IPv4	and  TCP  IPv6,  udp for only UDP IPv4, or udp6 for both UDP IPv4 and UDP

		  For example, you can specify Port_list=80/tcp,40/udp.

       IP affinity guarantees that connections from a given client IP address  are  forwarded  to
       the  same cluster node or zone. Affinity_timeout, UDP_affinity, and Weak_affinity are only
       relevant when Load_balancing_policy is set to  either  Lb_sticky  or  Lb_sticky_wild.  See
       r_properties(5) for detailed information.

       clresource(1CL),  clresourcegroup(1CL), clresourcetype(1CL), rt_callbacks(1HA), rt_reg(4),

       Sun Cluster Software Installation Guide for Solaris OS, Sun Cluster Data  Services  Devel-
       oper's Guide for Solaris OS

Sun Cluster 3.2 			   31 Jul 2007			      scalable_service(5)

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