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Operating Systems AIX ISCSI poor performance 1.5MB/s fresh install AIX7.1 Post 302977764 by cerber0 on Thursday 21st of July 2016 10:46:38 PM
Old 07-21-2016
I don't know if this can be useful
Quote:

Tune network options and interface parameters for maximum iSCSI I/O throughput on the AIX system as follows:
  • Enable the RFC 1323 network option.
  • Set up the tcp_sendspace, tcp_recvspace, sb_max, and mtu_size network options and network interface options to appropriate values. The iSCSI Software Initiator's maximum transfer size is 256 KB. Assuming that the system maximums for tcp_sendspace and tcp_recvspace are set to 262144 bytes, an ifconfig command used to configure a gigabit Ethernet interface might look like the following: ifconfig en2 10.1.2.216 mtu 9000 tcp_sendspace 262144 tcp_recvspace 262144
  • Set the sb_max network option to at least 524288, and preferably 1048576.
  • Set the mtu_size to 9000.
  • For some iSCSI targets, the TCP Nagle algoritm must be disabled for best performance. Use the no command to set the tcp_nagle_limit parameter to 0, which will disable the Nagle algorithm.
 

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IFCONFIG(1)							   User Commands						       IFCONFIG(1)

NAME
ifconfig - configure network interfaces SYNOPSIS
ifconfig [OPTION...] DESCRIPTION
NAME [ADDR] [broadcast BRDADDR] [pointopoint|dstaddr DSTADDR] [netmask MASK] [metric N] [mtu N] [txqueuelen N] [up|down] [FLAGS] Configure network interfaces. -a, --all display all available interfaces -A, --address=ADDR set interface address to ADDR -B, -b, --broadcast=ADDR, --brdaddr=ADDR set broadcast address to ADDR -d, -p, --dstaddr=ADDR, --peer=ADDR set destination (peer) address to ADDR --down shut the interface down --format=FORMAT select output format (or set back to default) -F, --flags=FLAG[,FLAG...] set interface flags -i, --interface=NAME configure network interface NAME -m, --netmask=MASK set netmask to MASK --metric=N set metric of interface to N -M, --mtu=N set mtu of interface to N -s, --short short output format --up activate the interface (default if address is given) -v, --verbose output information when configuring interface Linux-specific options -T, --txqlen=N set transmit queue length to N -?, --help give this help list --usage give a short usage message -V, --version print program version Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options. Known flags are: allmulti, automedia, debug, loopback, multicast, portsel, running, trailers, up AUTHOR
Written by Marcus Brinkmann. REPORTING BUGS
Report bugs to <bug-inetutils@gnu.org>. COPYRIGHT
Copyright (C) 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
The full documentation for ifconfig is maintained as a Texinfo manual. If the info and ifconfig programs are properly installed at your site, the command info ifconfig should give you access to the complete manual. GNU inetutils 1.9 December 2011 IFCONFIG(1)
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