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HP XP P9500 Hitachi Dynamic Link Manager Software User Guide for VMWare (HIT52 - Page 180

LU Logical Unit, non-owner controller, non-owner path, Glossary-4

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Load balancing uses VMware vSphere PSPs. HDLM can use the following load balancing algorithms: - The Extended Round Robin algorithm - The Extended Least I/Os algorithm - The Extended Least Blocks algorithm - The Most Recently Used algorithm (VMware) - The Round Robin algorithm (VMware) LU (Logical Unit) A logical unit that is a logical volume defined in the storage system, and with which the host can perform input or output operations. (See also: host LU) N non-owner controller A controller other than an owner controller. Non-owner controllers exist only in the Hitachi AMS/WMS series. (See also: owner controller, non-owner path) non-owner path A path that passes through a non-owner controller. Non-owner paths exist only in the Hitachi AMS/WMS series. (See also: owner path, non-owner controller) O owner controller A controller that has been set as an owner controller for an LU. Owner controllers are only in the Hitachi AMS/WMS series. A controller other than an owner controller is called a non-owner controller. When using the Universal Storage Platform V/VM, Virtual Storage Platform, Hitachi AMS2000 series, or Hitachi SMS, all controllers are owner controllers. (See also: owner path, non-owner controller) owner path A path that passes through an owner controller for an LU in the Hitachi AMS/WMS series. A path that passes through a controller other than an owner controller is called a non-owner path. When using the Universal Storage Platform V/VM, Virtual Storage Platform, Hitachi AMS2000 series, or Hitachi SMS, all paths are owner paths. (See also: owner controller, non-owner path) # ABCD E F GH I J K LMNOPQR S T U VWX Y Z Glossary-4 Hitachi Dynamic Link Manager User Guide (for VMware(R))

Section	Page
User Guide (for VMware(R))	1
Contents	3
Preface	9
Intended audience	10
Product version	10
Release notes	10
Document revision level	10
Document organization	10
Referenced documents	11
Document conventions	11
Convention for storage capacity values	13
Getting help	13
Comments	14
Overview of HDLM	15
What is HDLM?	16
HDLM Features	17
HDLM Functions	19
Devices Managed by HDLM	20
System Configuration	20
LU Configuration	21
Program Configuration	22
HDLM driver and NMP positions	23
Distributing a Load Using Load Balancing	24
Paths to Which Load Balancing Is Applied	26
Load Balancing Algorithms	27
Performing Failovers and Failbacks Using Path Switching	29
Automatic Path Switching	29
Manual Path Switching	31
Path Status Transition	32
Monitoring Intermittent Errors	34
Checking Intermittent Errors	34
Setting Up Intermittent Error Monitoring	34
Intermittent Error Monitoring Actions	35
When a User Changes the Intermittent Error Information	37
Detecting Errors by Using Path Health Checking	39
Error Management	39
Types of Collected Logs	40
Collecting Error Information Using the Utility for Collecting HDLM Error Information (DLMgetras)	41
Collecting Audit Log Data	41
Categories and Audit Events that HDLM Can Output to the Audit Log	43
Requirements for Outputting Audit Log Data	44
Destination and Filtering of Audit Log Data	45
Audit Log Data Formats	45
Creating an HDLM Environment	49
HDLM System Requirements	50
Hosts and OSs Supported by HDLM	50
Storage Systems Supported by HDLM	50
Memory and Disk Capacity Requirements	51
Number of Paths Supported in HDLM	51
Flow for Creating an HDLM Environment	52
HDLM Installation Types	52
Notes on Creating an HDLM Environment	52
Installing HDLM	53
Performing a New Installation of HDLM	53
Performing a Re-installation of HDLM	56
Checking the Path Configuration	56
Setting Up HDLM	57
Checking the Current Settings	57
Setting Up the HDLM Functions	58
Checking the Updated Settings	60
Setting Up Integrated Traces	61
Uninstalling HDLM	63
Preparations for HDLM Uninstallation	63
Uninstalling HDLM	64
HDLM Operation	67
HDLM Operations Using Commands	68
Notes on Using Commands	68
Viewing Path Information	68
Changing the Status of Paths	69
Viewing LU Information	70
Initializing Statistical Information for Paths	71
Viewing and Setting Up the Operating Environment	71
Viewing License Information	72
Updating the License	73
Viewing HDLM Version Information	73
Troubleshooting	75
Information Collected by the DLMgetras Utility for Collecting HDLM Error Information	76
Checking Error Information in Messages	76
What To Do for a Path Error	76
Examining the Messages	78
Obtain Path Information	78
Identifying the Error Path	78
Narrowing Down the Hardware That Might Have Caused the Error	78
Identifying the Error Location and Correcting any Hardware Error	78
Placing the Path Online	78
What To Do for a Program Error	79
Examining the Messages	79
Obtaining Program Information	79
What To Do for the Program Error	80
Contacting your HDLM Vendor or Maintenance Company	80
What To Do for Other Errors	80
Command Reference	81
Overview of the HDLM Command dlnkmgr	82
clear (Returns the Path Statistics to the Initial Value)	83
Format	83
Parameters	84
help (Displays the Operation Format)	85
Format	85
Parameter	85
offline (Places Paths Offline)	87
Format	88
Parameters	88
online (Places Paths Online)	91
Format	91
Parameters	92
set (Sets Up the Operating Environment)	95
Format	95
Parameters	96
view (Displays Information)	102
Format	102
Parameters (To display program information)	104
Utility Reference	129
The DLMgetras Utility for Collecting HDLM Error Information	130
Format	130
Parameters	130
List of Collected Error Information	131
Messages	135
Before Viewing the List of Messages	136
Format and Meaning of Message IDs	136
Terms Used in Messages and Message Explanations	136
KAPL01001 to KAPL02000	137
KAPL09001 to KAPL10000	157
KAPL10001 to KAPL11000	158
KAPL13001 to KAPL14000	163
KAPL15001 to KAPL16000	164
KAPL20001 to KAPL21000	165
KAPL21001 to KAPL22000	169
Acronyms and abbreviations	171
Glossary	177