IBM 890 manual z/VM, LCSS0, LCSS1, HiperSockets CHPID

z/VM				z/OS	Linux		z/VM	Linux			Linux
				LPAR	LPAR		LPAR	LPAR			LPAR
LPAR 1
				14		15	17	18			30
			LCSS0					LCSS1
	MIF-1 MIF-2			MIF-F			MIF-1 MIF-2 MIF-3			MIF-F
CHPID CHPID CHPID CHPID				CHPID		CHPID	CHPID CHPID		CHPID CHPID CHPID
00	01	02	03		FF		00	01	05	22	FF
			Share			04			Share
PCHID PCHID PCHID				PCHID		SPAN	PCHID PCHID			PCHID PCHID
010B	010C	010D		020A			0245	0246		0248	0249

HiperSockets CHPID 03 HiperSockets CHPID 05

HiperSockets CHPID 04

HiperSockets does not use an external network, therefore, it can free up system and network resources, helping to reduce attachment cost while improving availability and performance. HiperSockets can have signifi cant value in server consolidation, for example, by connecting multiple Linux virtual servers under z/VM to z/OS LPARs within the same z890. Furthermore, HiperSockets can be utilized by TCP/IP in place of XCF for sysplex connectivity between images which exist in the same server, thus z/OS TCP/IP uses HiperSockets for connectivity between sysplex images in the same server and uses XCF for connectiv- ity between images in different servers. Management and administration cost reductions over existing confi gurations are possible.

HiperSockets acts like any other TCP/IP network interface, so TCP/IP features like IP Security (IPSec) in Virtual Private Networks (VPN) and Secure Sockets layer (SSL) can be used to provide heightened security for fl ows within the same CHPID. HiperSockets supports multiple frame sizes, which is confi gured on a per HiperSockets CHPID basis.

This support gives the user the fl exibility to optimize and tune each HiperSockets to the predominant traffi c profi le, for example to distinguish between “high bandwidth” workloads such as FTP versus lower bandwidth interactive workloads.

The HiperSockets function provides many possibilities for improved integration between workloads in different LPARs, bound only by the combinations of operating systems and their respective applications. HiperSockets is intended to provide the fastest zSeries connection between e-business and Enterprise Resource Planning (ERP) solutions sharing information while running on the same server. WebSphere http and Web Application Servers or Apache http servers can be running in a Linux image (LPAR or z/VM guest) and will be able to use HiperSockets for very fast TCP/IP traffi c transfer to a DB2 database server running in a z/OS LPAR. System performance is optimized because this allows you to keep your Web and transaction application environments in close proximity to your data and helps eliminate any expo- sure to network related outages, thus improving availability.

The z/OS HiperSockets Accelerator function can help improve performance and cost effi ciencies when attach- ing a high number of TCP/IP images via HiperSockets to a “front end” z/OS system for shared access to a set of OSA- Express adapters.

HiperSockets VLAN support in a Linux environment: Virtual Local Area Networks (VLANs), IEEE standard 802.1q, is now being offered for HiperSockets in a Linux for zSeries environ- ment. VLANs can help reduce overhead by allowing networks to be organized for optimum traffi c fl ow; the network is orga- nized by traffi c patterns rather than physical location. This enhancement permits traffi c to fl ow on a VLAN connection between applications over HiperSockets and between appli- cations on HiperSockets connecting to an OSA-Express Giga- bit Ethernet, 1000BASE-T Ethernet, or Fast Ethernet feature.

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