Dell EqualLogic PS6210XV EqualLogic Multipathing Extension Module Installation - Page 19

Configuring the Dell EqualLogic MEM, EHCM Configuration File

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3 Configuring the Dell EqualLogic MEM EHCM Configuration File The configuration file that stores configuration parameters is located on the ESXi host at /etc/cim/dell/ehcmd.conf. The preferred method of changing the configuration is through the vSphere CLI tools. The following table shows the parameters and applicable values. Each line in the file uses the format param=value. Table 5. EHCM Configuration Values Name RotateLogFiles Default Value yes Maximum Minimum Description Not applicable Not applicable Specifies method for handling the EHCMD log rotation policy for the MEM. If the RotateLogFiles parameter is set to false, EHCMD does not handle log rotation. Instead it uses native operating system log rotation policy (if supported). TotalSessions 512 1024 64 VolumeSessions 6 12 1 MemberSessions MinAdapterSpeed MultiLunMemberSessions MultiLunVolumeSessions 2 4 1 1000 10000 10 4 16 1 16 64 1 Maximum total number of sessions created to all EqualLogic volumes. You can lower this limit in large configurations to keep the session count within VMware ESXi and PS group limits. Maximum number of sessions that are created to each EqualLogic volume. You can lower this limit in large configurations to keep the session count within VMware ESXi and PS group limits. Maximum number of sessions that are created to each volume slice (portion of a volume on a single member). Minimum adapter speed for iSCSI multipathing. Maximum number of MultiLun MPIO sessions used per member per protocol endpoint (PE) target. Maximum number of MultiLun MPIO sessions used for entire protocol endpoint (PE) target. When determining how many sessions to create per volume, EHCM chooses a value that meets all of the constraints that are specified by the totalsessions, volumesessions, and membersessions values. EHCM does not establish entirely redundant paths (iSCSI sessions that have identical server and array endpoints). Depending on your configuration, the actual number of sessions that are created might be less than you specify for the configuration. See the Dell EqualLogic PS Series documentation for group limits and pool limits on total iSCSI sessions. For large configurations, you might need to reduce the number of sessions created per volume. Configuring the Dell EqualLogic MEM 19

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Configuring the Dell EqualLogic MEM
EHCM Configuration File
The configuration file that stores configuration parameters is located on the ESXi host at
/etc/cim/dell/ehcmd.conf
. The
preferred method of changing the configuration is through the vSphere CLI tools.
The following table shows the parameters and applicable values. Each line in the file uses the format
param=
value
.
Table 5. EHCM Configuration Values
Name
Default
Value
Maximum
Minimum
Description
RotateLogFiles
yes
Not applicable
Not applicable
Specifies method for handling the EHCMD
log rotation policy for the MEM.
If the
RotateLogFiles
parameter is set
to false, EHCMD does not handle log
rotation. Instead it uses native operating
system log rotation policy (if supported).
TotalSessions
512
1024
64
Maximum total number of sessions created
to all EqualLogic volumes. You can lower
this limit in large configurations to keep the
session count within VMware ESXi and PS
group limits.
VolumeSessions
6
12
1
Maximum number of sessions that are
created to each EqualLogic volume. You can
lower this limit in large configurations to
keep the session count within VMware ESXi
and PS group limits.
MemberSessions
2
4
1
Maximum number of sessions that are
created to each volume slice (portion of a
volume on a single member).
MinAdapterSpeed
1000
10000
10
Minimum adapter speed for iSCSI
multipathing.
MultiLunMemberSessions
4
16
1
Maximum number of MultiLun MPIO
sessions used per member per protocol
endpoint (PE) target.
MultiLunVolumeSessions
16
64
1
Maximum number of MultiLun MPIO
sessions used for entire protocol endpoint
(PE) target.
When determining how many sessions to create per volume, EHCM chooses a value that meets all of the constraints that are specified by
the
totalsessions
,
volumesessions
, and
membersessions
values.
EHCM does not establish entirely redundant paths (iSCSI sessions that have identical server and array endpoints). Depending on your
configuration, the actual number of sessions that are created might be less than you specify for the configuration.
See the Dell EqualLogic PS Series documentation for group limits and pool limits on total iSCSI sessions. For large configurations, you
might need to reduce the number of sessions created per volume.
3
Configuring the Dell EqualLogic MEM
19