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Operating Systems AIX How to configure iSCSI TOE w/ load balancing? Post 302750259 by cbrinker on Monday 31st of December 2012 09:29:05 AM
Old 12-31-2012
How to configure iSCSI TOE w/ load balancing?

Sorry guys but let me start off by saying I am an AIX noob! I am running AIX 6.1 and recently purchased two iSCSI TOE cards. The plan is to connect these two cards to a Dell EqualLogic SAN and that has two volumes configured for logs and data.

The point of the two cards is to do load balancing and fail over if one card does, obviously I am interested in making this reliable and always available.


What I have done so far is:

Configured the ics0 and ics1 to have
IP addresses on the iSCSI network with the SAN
discovery policy of file
Edited the /etc/iscsi/targetshw# to include the paths to both volumes that I have configured

Now, when I do lspv, I see four new hdisks, because each card has connected to each volume. So obviously I have duplicate connections.

What I want to do is have these two cards load balance the connection and failover if a card dies and that's where I am stuck. I have read a little on MPIO but not having much luck with iSCSI TOE.

Can anyone add any configuration advice, it would be much appreciated!!
 

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OCF_HEARTBEAT_ISCSI(7)						OCF resource agents					    OCF_HEARTBEAT_ISCSI(7)

NAME
ocf_heartbeat_iscsi - Manages a local iSCSI initiator and its connections to iSCSI targets SYNOPSIS
iscsi [start | stop | status | monitor | validate-all | methods | meta-data] DESCRIPTION
OCF Resource Agent for iSCSI. Add (start) or remove (stop) iSCSI targets. SUPPORTED PARAMETERS
portal The iSCSI portal address in the form: {ip_address|hostname}[":"port] (required, string, no default) target The iSCSI target IQN. (required, string, no default) discovery_type Target discovery type. Check the open-iscsi documentation for supported discovery types. (optional, string, default sendtargets) iscsiadm open-iscsi administration utility binary. (optional, string, default iscsiadm) udev If the next resource depends on the udev creating a device then we wait until it is finished. On a normally loaded host this should be done quickly, but you may be unlucky. If you are not using udev set this to "no", otherwise we will spin in a loop until a timeout occurs. (optional, string, default yes) SUPPORTED ACTIONS
This resource agent supports the following actions (operations): start Starts the resource. Suggested minimum timeout: 120. stop Stops the resource. Suggested minimum timeout: 120. status Performs a status check. Suggested minimum timeout: 30. monitor Performs a detailed status check. Suggested minimum timeout: 30. Suggested interval: 120. validate-all Performs a validation of the resource configuration. Suggested minimum timeout: 5. methods Suggested minimum timeout: 5. meta-data Retrieves resource agent metadata (internal use only). Suggested minimum timeout: 5. EXAMPLE
The following is an example configuration for a iscsi resource using the crm(8) shell: primitive example_iscsi ocf:heartbeat:iscsi params portal=string target=string op monitor depth="0" timeout="30" interval="120" SEE ALSO
http://www.linux-ha.org/wiki/iscsi_(resource_agent) AUTHOR
Linux-HA contributors (see the resource agent source for information about individual authors) resource-agents 1.0.3 07/05/2010 OCF_HEARTBEAT_ISCSI(7)
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