Red Hat APPLICATION STACK 2.0 RELEASE Uživatelská příručka stáhnout pdf (Strana 14)

DataDirect Networks SFA™ OS 2.0.0 Release Notes Revision A1 | 14

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Now, shut down and start up the VMs/stacks again using CLUI. After they boot up,

you can configure networking on the virtual machines.

• Suggested Ethernet Ordering in Virtual Machines for SFA12K-20E

For new installations, DDN recommends the following virtual machine Ethernet

ordering starting in SFA OS 2.0.0.

o VM eth0: virtual function interface associated with controller’s first port

o VM eth1: virtual function interface associated with controller's 2nd port

o VM eth2: user mode networking support (provides port 555x ssh functionality)

Ethernet interface numbers larger than eth2 may be associated with Mellanox cards

operating in 10G/40G mode.

Controller eth0 (and VM eth0) are meant to be connected to the customer network

and may also be used by DDN Solutions like GRIDScaler for network management.

Controller eth1 (and VM eth1) are reserved for DirectMon.

Starting with EXAScaler 1.6.1 and GRIDScaler 2.0.0, this naming and usage

convention is used and configured as part of the ISO installation process.

The SFA OS User Guide has more information on Ethernet interface configuration

for controllers and VMs.

• ConnectX3 HCA IB read and write performance drops on PCI bus 1 when the

message size is more than 128 KiB.

5.3 SFA12K and SFA10K

• When an SFA is upgraded from SFA OS v1.5.3 to v2.0.0.3, initiators running RHEL 5.x

may get I/O errors. These errors can occur during a small window of time (typically

less than 5 seconds) when the controller running v1.5.3 is preparing to reboot and

responds ‘Ready’ to a Test Unit Ready inquiry from the initiator. If the host

application re-issues the I/O, I/O will continue as normal.

• To improve failover time with RHEL 6.x and Qlogic cards, the following is

recommended to enable the QLogic driver to react quickly to a loss of path :

Qlogic driver: 8.04.00.06.06.0-k

Add the parameter ‘ql2xasynctmfenable=1’ to /etc/modprobe.d/modprobe.conf

Example line in modprobe.conf:

options qla2xxx ql2xfwloadbin=1 ql2xqfullrampup=15 ql2xasynctmfenable=1

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