02-06-2020
Of all the 300 production web servers, most of them run different apps, and they are all divided into different segments, like 90, 130, 140, 80, 60.
Some (Very few) are used for load balancing.
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LEARN ABOUT OPENSOLARIS
mp_setlogicalunitloadbalancetype
MP_SetLogicalUnitLoadBalanceType(3MPAPI) Common Multipath Management Library Functions MP_SetLogicalUnitLoadBalanceType(3MPAPI)
NAME
MP_SetLogicalUnitLoadBalanceType - set a load balancing policy
SYNOPSIS
cc [ flag... ] file... -lMPAPI [ library... ]
#include <mpapi.h>
MP_STATUS MP_SetLogicalUnitLoadBalanceType(MP_OID logicalUnitoid,
MP_LOAD_BALANCE_TYPE loadBalance);
PARAMETERS
logicalUnitOid The object ID of the multipath logical unit.
loadBalance The desired load balance policy for the specified logical unit.
DESCRIPTION
The MP_SetLogicalUnitLoadBalanceType() function sets the multipath logical unit's load balancing policy. The value must correspond to one
of the supported values in MP_PLUGIN_PROPERTIES.SupportedLogicalUnitLoadBalanceTypes.
RETURN VALUES
MP_STATUS_INVALID_OBJECT_TYPE
The logicalUnitOid does not specify any valid object type. This is most likely to happen if an uninitialized object ID is passed to the
API.
MP_STATUS_INVALID_PARAMETER
The loadBalance is invalid or logicalUnitOid has a type subfield other than MP_OBJECT_TYPE_MULTIPATH_LU.
MP_STATUS_OBJECT_NOT_FOUND
The logicalUnitOid owner ID or object sequence number is invalid.
MP_STATUS_SUCCESS
The operation is successful.
MP_STATUS_FAILED
The specified loadBalance type cannot be handled by the plugin. One possible reason for this is a request to set MP_LOAD_BAL-
ANCE_TYPE_PRODUCT when the specified logical unit has no corresponding MP_DEVICE_PRODUCT_PROPERTIES instance (i.e., the plugin does not
have a product-specific load balance algorithm for the LU product).
MP_STATUS_UNSUPPORTED
The implementation does not support the API.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard: ANSI INCITS 412 |
| |Multipath Management API |
+-----------------------------+-----------------------------+
|MT-Level |Safe |
+-----------------------------+-----------------------------+
SEE ALSO
libMPAPI(3LIB), attributes(5)
Multipath Management API Version 1.0
SunOS 5.11 15 Feb 2006 MP_SetLogicalUnitLoadBalanceType(3MPAPI)