Hi,
In FreeBSD 7.0 the defaults are:
net.inet.ip.dummynet.hash_size: Default hash table size
net.inet.ip.dummynet.hash_size: 64
net.inet.ip.dummynet.max_chain_len: Max ratio between dynamic queues and
buckets
net.inet.ip.dummynet.max_chain_len: 16
From man ipfw: "Target value for the maximum number of pipes/queues in
a hash bucket. The product max_chain_len*hash_size is used to determine
the threshold over which empty pipes/queues will be expired even when
net.inet.ip.dummynet.expire=0."
Does hash_size=64 and max_chain_len=16 mean there can only be 64*16
pipes? hash_size can be as large as 65536. Should I change their values
so that the product is as large as the expected number of concurrent pipes?
What happens when a pipe expires? Will it get deleted? What if more
traffic appears triggering the pipe from its original ipfw rule?
Thank you.
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