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Hi,
I am struggling a bit to understand the maximum connection capacity of a
director.
As I understood, each connection worth 128Bytes of memory which means a
1GB server can handle more than a Million connection.
Fine. But there is also this Linux "port available" limitation which if
I understood correctly would reduce the number of
of possible connection to about (65k-1024) * number of real servers.
Which can be a bottle neck as the infamous TIME_WAIT connections are
counted as part of those connections.
I am using a LVS-NAT director so I am not really using local port for
each connections which make this second limitation a non sens to me.
In theory I could have (65k-1024) * number of real server * number of
client IP which anyway would be much bigger than the first memory
limitation.
Is this correct ?
The other question is around kernel tcp parameters.
I don't really like to mess around with tcp parameters, but it is
possible to limit the effect of TIME_WAIT by using tcp_reuse. Now, I
know that lvs handle it's own tcp parameters like time_wait timeout for
instance so does it also handle it's own tcp_reuse mechanism ?
Thanks for your input.
Cheers
Ben
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Benjamin Cleyet-Marrel
Consultant
OSS: Open Systems Specialists Ltd
phone: 09-984-3000
fax: 09-984-3001
mobile: 021-721-869
email: bcm@xxxxxxxxx
web: www.oss.co.nz
post: P.O. Box 8833, Auckland
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