Re: [Veritas-bu] Any gotchas with 10 GB Ethernet?
2010-02-02 02:24:55
This is what we use, though it is not special to 10GbE; I've no doubt many
people will have their own schemes. It's from a script that checks settings
against our design:
NETWORK TUNING PARAMETERS
TCP parameters:
tcp_wscale_always: current: 1 recommended: 1
tcp_tstamp_if_wscale: current: 1 recommended: 1
tcp_xmit_hiwat: current: 1048576 recommended: 1048576
tcp_recv_hiwat: current: 1048576 recommended: 1048576
tcp_cwnd_max: current: 2097152 recommended: 2097152
tcp_max_buf: current: 4194304 recommended: 4194304
tcp_time_wait_interval: current: 60000 recommended: 60000
tcp_conn_req_max_q: current: 8192 recommended: 8192
Sendpipes & Recvpipes:
route <x.x.x.x> recvpipe: current: 1048576 recommended: 1048576
route <x.x.x.x> sendpipe: current: 1048576 recommended: 1048576
I'd say the hiwat settings are the most important, and tcp_cwnd_max and
tcp_max_buf must be raised to allow for that. We are also implementing Jumbo
Frames which in testing made about 60-80% increase in throughput using iperf.
Slightly harder to test with NetBackup as more moving parts like disks
involved, and for many clients we cannot set it as we don't have a separate
backup LAN, and some applications don't want to try it.
William D L Brown
-----Original Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Tschida,
Tom (STP)
Sent: 01 February 2010 22:29
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Any gotchas with 10 GB Ethernet?
Hello All,
We are in the process of implementing 2 new Solaris media servers with
10 GB Ethernet. Are there any gotchas on the OS side or the NetBackup
side I should be aware of? Any buffer settings we need to tweak or new
touch files, etc?
Thanks in advance.
Tom Tschida
Boston Scientific
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