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Throughput

6

Throughput

GigE Traffic Alone Compared to GigE Traffic in Conjunction with FC 

Bidirectional

Figure 2

PCI-X GigE Rx Performance Compared to: Rx + FC BD

Figure 2 shows PCI-X 

Gigabit Ethernet

 Receive (Rx) performance. With 1, 2, or 4 cells 

configured, the following throughput rates were achieved:

Receive throughput on the GigE port with no Fiber channel traffic on a 1 cell partition is 

an excellent 929 Mbits/sec. As the partition size is increased by adding up to 3 more 

cells, receive throughput shows no significant drop in performance. A similar pattern 

emerges when GigE receive and FC bidirectional are combined.  GigE receive 

throughput is 837 Mbits/sec with no significant change as partition size is increased.

When tested in a PCI-66 slot, the performance results for receive only throughput are 

identical to PCI-X performance.  When GigE receive and FC bidirectional traffic are 

combined, PCI-66 performance is 585 Mbits/sec with no significant change as 

partition size increases. The decreased performance seen when both ports are active on 

the A9782A/A9784A is a result of the bandwidth limitation of the PCI-66 technology 

and is not due to a limitation in the adapter.

929

924

837

921

830

837

0

100

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400

500

600

700

800

900

1000

Rx

Rx + FC BD

Mbi

ts

/s

ec

1 Cell

2 Cells

4 Cells

Содержание 2G

Страница 1: ... Compared to FC Traffic in Conjunction with GigE Bidirectional 9 Performance Highlights 12 Suggested Use 12 Achieving Best Performance and High Availability 12 Test Details 15 Test Details Products Used in Testing 15 Test Details Test Configuration 16 Additional Information 17 Taking the Next Step 17 Legal Notices 18 PCI X 2 Gigabit Fibre Channel and Gigabit Ethernet Performance Using the HP rp840...

Страница 2: ......

Страница 3: ...T Gigabit Ethernet networking connectivity Higher port density for I O slot constrained systems Higher levels of failover protection because two multi function adapters have no single point of failure The same level of failover protection would require four single port I O adapters 2 Fibre Channel and 2 Gigabit Ethernet that would consume twice the number of I O slots The adapters also fully suppo...

Страница 4: ... UDP and IP checksum protocol off loading increases network flexibility through support for virtual LANs VLANs increases throughput through use of HP auto port aggregation APA or improves reliability and failover through the LAN Monitor capability of HP APA is available in a choice of either a 1000 Base SX version using multi mode fiber supporting distances of up to 550m or a 1000Base T version us...

Страница 5: ...d Wr tests concurrently The following charts show the overall performance of one PCI X multi function 2 Gigabit Fibre Channel and Gigabit Ethernet adapter in each 1 2 or 4 cell 16 way rp8400 with Server Expansion Unit SEU In the enclosed charts the Gigabit Ethernet throughput numbers are shown in Megabits per second and the Fibre Channel throughput numbers are shown in Megabytes per second For eac...

Страница 6: ...similar pattern emerges when GigE receive and FC bidirectional are combined GigE receive throughput is 837 Mbits sec with no significant change as partition size is increased When tested in a PCI 66 slot the performance results for receive only throughput are identical to PCI X performance When GigE receive and FC bidirectional traffic are combined PCI 66 performance is 585 Mbits sec with no signi...

Страница 7: ...smit throughput is 700 Mbits sec on a 1 cell partition and decreases to 638 Mbits sec as partition size is increased to 4 cells When tested in a PCI 66 slot the performance results for transmit only throughput showed no decrease in performance when compared to PCI X When GigE transmit and FC bidirectional traffic are combined PCI 66 performance is 440 Mbits sec with no significant change as partit...

Страница 8: ...tion size is increased to 4 cells You see a more significant decrease on the A9782A A9784A when both ports are active due to the inherent bandwidth limitations of the PCI X technology when both links are carrying full bidirectional traffic When tested in a PCI 66 slot the performance results for bidirectional only throughput showed no decrease in performance when compared to PCI X When GigE bidire...

Страница 9: ...size is increased by adding up to 3 more cells read throughput shows no drop in performance A similar pattern emerges when FC read and GigE bidirectional are combined FC read throughput is 191 MBytes sec with no change as partition size is increased When tested in a PCI 66 slot the performance results for read only throughput are identical to PCI X performance When FC read and GigE bidirectional t...

Страница 10: ...1 cell partition and decreases to 143 MBytes sec as partition size is increased to 4 cells When tested in a PCI 66 slot the performance results for write only throughput showed no decrease in performance when compared to PCI X When FC write and GigE bidirectional traffic are combined PCI 66 performance is 117 MBytes sec As you increase the partition size by adding up to 3 more cells write throughp...

Страница 11: ...en tested in a PCI 66 slot the performance results for Bidirectional only throughput showed a similar pattern when compared to PCI X Bidirectional throughput on the FC port with no GigE traffic on a 1 cell partition is 250 MBytes sec As you increase the partition size by adding up to 3 more cells bidirectional throughput decreases to 230 MBytes sec When FC bidirectional and GigE bidirectional traf...

Страница 12: ...functions ports of an A9782A or A9784A this obviously provides maximum connectivity The data in this paper shows that when both functions of the A9782A A9784A are in use as opposed to a single function the limits of the PCI and PCI X technologies can be reached reducing performance In summary Where connectivity is a higher priority than performance use the adapters with both functions operating co...

Страница 13: ...ged by logical volume manager LVM PVLinks for alternate paths or SecurePath Connect each GigE port through a different network switch and ensure that the switches are bridged to the same IP subnet Failover between the two network paths is managed by Serviceguard s local network failover capability Connect the built in network ports on multiple rp8400s to a private subnet and use them for a dedicat...

Страница 14: ...ther than PCI In the system under test the PCI X slots are the slots located in the rp8400 Server Expansion Unit SEU not the base rp8400 system See Test Details Test Configuration for more details on the PCI X slots of the rp8400 SEU Please see your sytems documentation for the location of the PCI X slots in your systems On an rp8400 Server with Server Expansion Unit SEU configure each cell in the...

Страница 15: ...M 4GB per cell Operating System HP UX 11i version 1 B 11 11 0312 Adapter Tested A9782A A9784A 2 Gigabit Fibre Channel and Gigabit Ethernet adapter PCI X 64 bit 133MHz LAN Driver version Gigether 01 B 11 11 11 FC Driver version FibrChanl 01 B 11 11 02 Clients generating the test load for Gigabit Ethernet Four j6000 workstations Two 552 MHz CPUs each Operating System HP UX 11i version 1 B 11 11 0303...

Страница 16: ... the Gigabit Ethernet port on the adapter in the rp8400 SEU to one HP 9304M Procurve Routing Switch Four 2 way j6000 each containing a single PCI 1000Base SX adapter were connected to the switch The Fibre Channel test load was generated by connecting the Fibre Channel port on the adapter in the rp8400 SEU to a BrocadeTM Fibre Channel switch Four HP DS2405 Disk Systems capable of handling 2Gbyte s ...

Страница 17: ...nction_adapters overview html This paper is the latest in a series of white papers detailing the performance of HP s link and server products For a complete list of white papers on HP s Fibre Channel and Gigabit Ethernet solutions go to http docs hp com Taking the Next Step With demonstrable performance and high availability the A9782A A9784A PCI X 2 Gigabit Fibre Channel and Gigabit Ethernet adap...

Страница 18: ...ompanying such products and services Nothing herein should be construed as constituting an additional warranty HP shall not be liable for technical or editorial errors or omissions contained herein HP UX Serviceguard and Superdome are registered trademarks of the Hewlett Packard Corporation Brocade is a trademark of Brocade communications All other trademarks and registered trademarks are the prop...

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