Users Guide
Example: Initializing a PS Series Array........................................................................................................................ 26
Managing Access to a PS Series Group...........................................................................................................................26
Adding Access to a Group............................................................................................................................................26
Listing Accessible Groups...................................................................................................................................................27
rswcli --list-group Command Syntax...........................................................................................................................27
Example: Listing Information for Groups.................................................................................................................... 28
Modifying Access to a Group.............................................................................................................................................28
rswcli --modify-group-access Command Syntax......................................................................................................28
Example: Modifying Group Access..............................................................................................................................28
Removing Host Access to a Group...................................................................................................................................29
rswcli --remove-group-access Command Syntax.................................................................................................... 29
Example: Removing Host Access to Group............................................................................................................... 29
Configuring Multipath I/O.................................................................................................................................................. 29
4 Configuring Multipath I/O Devices...............................................................................................30
Accessing Volumes Using Multipath I/O..........................................................................................................................30
Discovering Targets...................................................................................................................................................... 30
Log In to an MPIO Volume............................................................................................................................................ 31
Logging Out of an MPIO Volume.................................................................................................................................32
Displaying Connections to a Volume........................................................................................................................... 32
Managing Automatic Logins.........................................................................................................................................32
Managing iSCSI Interfaces........................................................................................................................................... 32
Multipath Device Configuration.........................................................................................................................................33
Traditional Multipath Device Configurations....................................................................................................................33
Multipath Configuration................................................................................................................................................33
Example Multipath Device Configuration................................................................................................................... 35
Special MPIO Configuration Cases............................................................................................................................. 35
Conditions for Configuring Multipath Devices.................................................................................................................36
Use of the multipathd Daemon............................................................................................................................. 36
Use of dm-switch Kernel Module................................................................................................................................36
Configuring Settings for Multipath I/O.............................................................................................................................37
Multipath I/O Sessions..................................................................................................................................................37
Setting MPIO Parameters............................................................................................................................................ 37
Listing MPIO Subnets....................................................................................................................................................37
Including a Subnet or Adapter for MPIO.......................................................................................................................... 39
rswcli --mpio-include Command Syntax.....................................................................................................................39
Examples: mpio-include Command............................................................................................................................. 40
Excluding a Subnet or Adapter From MPIO..................................................................................................................... 41
Including or Excluding Specific Host NICs........................................................................................................................ 41
Configuring I/O Path Selection.......................................................................................................................................... 41
Load Balancing Policy.................................................................................................................................................... 41
I/O Scheduling................................................................................................................................................................41
Setting Volume-Specific Configuration Parameters........................................................................................................41
5 Introduction to ASM/LE..............................................................................................................43
About ASM/LE.................................................................................................................................................................... 43
About Smart Copies............................................................................................................................................................ 43
Types of Smart Copies Created.................................................................................................................................. 44
Synchronous Replication and Smart Copies.............................................................................................................. 45
4
Contents