- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - HP-UX
- >
- 100BT Performance
Operating System - HP-UX
1753687
Members
5163
Online
108799
Solutions
Forums
Categories
Company
Local Language
юдл
back
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Discussions
Discussions
Forums
Forums
Discussions
юдл
back
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Blogs
Information
Community
Resources
Community Language
Language
Forums
Blogs
Go to solution
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО10-04-2000 03:35 PM
тАО10-04-2000 03:35 PM
I want to know how many packet 100BT card can handle.
Securities Company
Solved! Go to Solution.
3 REPLIES 3
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО10-04-2000 07:37 PM
тАО10-04-2000 07:37 PM
Solution
The answer is quite difficult to answer as it depends on the speed and loading of your computer, the type of LAN card (specifically the type of bus the LAN card uses) and the ability of the network hardware to process the packets. Throughput on a LAN is usually measured in bytes per second rather than packet count since very small packets (ie, 10 bytes) will have very high percentage of overhead.
In theory, 100 megabits can probably approach 7-9 megabytes/sec but some versions of the LAN card will never get past 2-3 megabytes/sec. Throughput significantly below this level is usually fue to overloaded LAN segments or cards that are setup with auto-negotiation. Always fix the communication rate on both the computger side as well as the hub to avoid problems.
Halfduplex will not improve the throughput except in cases where true simultaneous communication is the majority of usage, and on a slow computer, it can sometimes reduce throughput a bit.
Bill Hassell, sysadmin
In theory, 100 megabits can probably approach 7-9 megabytes/sec but some versions of the LAN card will never get past 2-3 megabytes/sec. Throughput significantly below this level is usually fue to overloaded LAN segments or cards that are setup with auto-negotiation. Always fix the communication rate on both the computger side as well as the hub to avoid problems.
Halfduplex will not improve the throughput except in cases where true simultaneous communication is the majority of usage, and on a slow computer, it can sometimes reduce throughput a bit.
Bill Hassell, sysadmin
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО10-05-2000 07:56 AM
тАО10-05-2000 07:56 AM
Re: 100BT Performance
You can also get a look at performance for the 100BaseT card from
http://www.netperf.org.
Berlene
http://www.netperf.org.
Berlene
http://www.mindspring.com/~bkherren/dobes/index.htm
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО10-25-2000 03:21 PM
тАО10-25-2000 03:21 PM
Re: 100BT Performance
100Base-T the _technology_ has a maximum packet per second limit based on the packet size, the bitrate (100 megabits) and the inter-packet spacing.
As far as a 100Base-T NIC goes, that will vary with the NIC. As others point-out, some NICs are better than others. For instance, the HP PCI 100BT NICs are leaps and bounds ahead of the HP-PB NICs.
Another factor will be the stack and driver path lengths and the CPU horsepower of the system. An N Class will be able to drive a higher number of 64-byte packets through a 100BT NIC than a K.
The actual packet per second at any packet size will be the _minimum_ of these possible limiters.
You can use netperf tests to try and guage some of these limits. One test would be the UDP_STREAM test, though it has issues with its lack of flow control. Another test would be the TCP_RR test with single-byte requests. If you run several in parallel you can try to max-out a NIC/ that way. There is also the TCP_STREAM test with the -D option to disable the Nagle algorithm.
More info about netperf can be had at http://www.netperf.org/ including instructions on how to join the netperf-talk mailing list.
Finally, by now, there should be a couple whitepapers talking about NIC performance at http://docs.hp.com/
As far as a 100Base-T NIC goes, that will vary with the NIC. As others point-out, some NICs are better than others. For instance, the HP PCI 100BT NICs are leaps and bounds ahead of the HP-PB NICs.
Another factor will be the stack and driver path lengths and the CPU horsepower of the system. An N Class will be able to drive a higher number of 64-byte packets through a 100BT NIC than a K.
The actual packet per second at any packet size will be the _minimum_ of these possible limiters.
You can use netperf tests to try and guage some of these limits. One test would be the UDP_STREAM test, though it has issues with its lack of flow control. Another test would be the TCP_RR test with single-byte requests. If you run several in parallel you can try to max-out a NIC/ that way. There is also the TCP_STREAM test with the -D option to disable the Nagle algorithm.
More info about netperf can be had at http://www.netperf.org/ including instructions on how to join the netperf-talk mailing list.
Finally, by now, there should be a couple whitepapers talking about NIC performance at http://docs.hp.com/
there is no rest for the wicked yet the virtuous have no pillows
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
News and Events
Support
© Copyright 2024 Hewlett Packard Enterprise Development LP