IBM z/OS - page 27

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 environ-

ments in close proximity to your data and helps eliminate

any exposure to network related outages, thus improving

availability.

The z/OS HiperSockets Accelerator function can improve

performance and cost efﬁ ciencies when attaching 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

environment. VLANs can help reduce overhead by allow-

ing networks to be organized for optimum trafﬁ c ﬂ ow; the

network is organized by trafﬁ c patterns rather than physi-

cal location. This enhancement permits trafﬁ c to ﬂ ow on a

VLAN connection between applications over HiperSockets

and between applications on HiperSockets connecting to

an OSA-Express Gigabit Ethernet, 1000BASE-T Ethernet,

or Fast Ethernet feature.

HiperSockets broadcast support for IPv4 packets – Linux,

z/OS, z/VM: Internet Protocol Version 4 (IPv4) broadcast

packets are now supported over HiperSockets internal

LANs. TCP/IP applications that support IPv4 broadcast,

such as z/OS OMPROUTE when running Routing Information

Protocol Version 1 (RIPv1), can send and receive broadcast

packets over HiperSockets interfaces. This support is exclu-

sive to z990. Broadcast for IPv4 packets is supported by

Linux for zSeries. Support is planned to be available in z/OS

1.5. Support is also offered in z/VM V4.4 and later.

HiperSockets Network Concentrator

HiperSockets Network Concentrator support, exclusive to

z890 and z990 can simplify network addressing between

HiperSockets and OSA-Express. You can now integrate

HiperSockets-connected operating systems into external

networks, without requiring intervening network routing

overhead, thus helping to increase performance and sim-

plify conﬁ guration. With HiperSockets Network Concentra-

tor support, you can conﬁ gure a special purpose Linux

operating system instance, which can transparently bridge

trafﬁ c between a HiperSockets internal Local Area Network

(LAN) and an external OSA-Express network attachment,

similar to a real Layer 2 switch which bridges between dif-

ferent network segments. This support can

make the inter-

nal HiperSockets network address connection

appear as if it

were directly connected to the external network.