Number of LUs and paths that are supported in HDLM

The following table lists the number of LUs and paths that are supported by HDLM.

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For a large-scale system configuration in which at least 1,024 paths are managed, a longer time is required to start the host or execute an HDLM configuration definition utility.

Examples of HDLM configuration definition utility execution times and host startup times that are measured in the following environment are listed in Table 2 and Table 3.

CPU: Xeon 3.07GHz×24

Memory: 99 GB

Configuration between the host and storage system: 4,096 LUs x 2 paths (8,192 paths in total)

Table. Examples of HDLM configuration definition utility execution times in a large-scale HDLM operating environment

HDLM configuration utility	Execution time	Description
dlmcfgmgr -r	4 minutes 31 seconds	Registers the path to an HDLM device.
dlmcfgmgr -o all	9 minutes 34 seconds	Excludes all managed HDLM devices (4,096 devices) from the management targets.
dlmcfgmgr -i all	63 minutes 43 seconds	Includes all unmanaged HDLM devices (4,096 devices) as management targets.
dlmcfgmgr -u all	8 minutes 20 seconds	Deletes all paths (8,192 paths) whose Device column is displayed as a hyphen (-) in the HDLM device configuration information which is displayed by executing dlmcfgmgr -v.

Table. Examples of host startup times in a large-scale HDLM operating environment

Operating environment	Time required for startup
An environment in which an HDLM device is not used as a boot disk	30 minutes 14 seconds
An environment in which an HDLM device is used as a boot disk	65 minutes 21 seconds