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gdtI am please to inform you that we have accepted your talk below for the linux.conf.au 2008 Sysadmin Miniconf.
Response to call for papers for linux.conf.au 2008 sysadmin miniconf
Topic
Tuning hosts for network performance.
Description
The bottleneck for network performance used to be transmission capacity. Huge amounts of capacity can now be had for moderate cost. The bottleneck has now moved to the host connected to the network and to the network protocols and their tuning.
This presentation gives Linux system administrators information to identify practices which lead to poor network performance. Common fault scenarios and the tools used to investigate those scenarios are explored.
The pros and cons of using Linux as a network middlebox are examined and a checklist of good practices for middleboxes are given.
Specific practices include: bandwidth-delay product and TCP buffer tuning; Linux buffer autotuning; congestion, link loss and TCP performance; common causes of link losses; choice of TCP algorithm, performance and fairness; applications design. Tools include: what do ping and traceroute actually measure; using iperf and ttcp, using Web100 kernel patches.
Middlebox issues include: participating in the control plane; anti-DoS measures; allowing fault diagnosis; queuing; minimising jitter; fairness; concurrent flow effects.