Dell PowerStore 3000X EMC PowerStore Virtualization Infrastructure Guide - Page 15

Performance best practices for PowerStore X model appliances

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Table 4. vSphere high availability (HA) Default vSphere value Recommended PowerStore value Disabled Enabled Table 5. vSphere HA Admission Control Default vSphere value Recommended PowerStore value Disabled Disabled Notes If a user disables HA, user VMs are not protected from ESXi host failures. Notes vSphere does not differentiate between PowerStore OS VMs and user-created VMs. If HA Admission Control is enabled, vSphere reserves resources for the PowerStore OS VMs and user VMs cannot be failed over. NOTE: Enabling HA Admission Control might prevent the PowerStore OS VMs from powering on. Table 6. vSphere HA option nas.ignoreInsufficientHbDatastore Default vSphere value Recommended PowerStore value Notes False True The default value for this setting causes vSphere to display a warning when there are fewer than two datastores in the cluster. This warning is unnecessary and misleading because the default PowerStore X model configuration has single vVol datastore. If this setting is changed, vSphere displays the warning message: The number of heartbeat datastores for host is 1, which is less than required: 2 Table 7. Protocol Endpoint (PE) path policy Default vSphere value Recommended PowerStore value Notes ● Path Selection Policy = Most Recently Used ● iops = 1000 ● No of outstanding I/Os with competing worlds = 32 ● Path Selection Policy = Round Robin The Round Robin policy allows the optimized use ● ● iops = 1 No of outstanding I/Os with competing worlds = 128 of multiple paths. The other parameter settings are recommendations for better performance and are based on testing. Changing these values can cause I/O performance degradation. Table 8. LLDP for virtual switches (vSS or vDS) Default vSphere value Recommended PowerStore value Disabled Disabled Notes To prevent networking problems, do not change this setting. Performance best practices for PowerStore X model appliances When a PowerStore X model appliance is deployed, additional configuration changes are recommended to provide optimal performance. These changes include: ● Creating additional internal iSCSI targets ● Increasing internal iSCSI queue depths ● Enabling Jumbo frames NOTE: For detailed configuration steps, see KB article HOW17288 PowerStore X - Performance Best Practice Tuning or see the PowerStore Virtualization Integration White Paper. Getting started 15

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Table 4. vSphere high availability (HA)
Default vSphere value
Recommended PowerStore value
Notes
Disabled
Enabled
If a user disables HA, user VMs are not protected
from ESXi host failures.
Table 5. vSphere HA Admission Control
Default vSphere value
Recommended PowerStore value
Notes
Disabled
Disabled
vSphere does not differentiate between
PowerStore OS VMs and user-created VMs. If
HA Admission Control is enabled, vSphere
reserves resources for the PowerStore OS VMs
and user VMs cannot be failed over.
NOTE:
Enabling HA Admission Control might
prevent the PowerStore OS VMs from
powering on.
Table 6. vSphere HA option nas.ignoreInsufficientHbDatastore
Default vSphere value
Recommended PowerStore value
Notes
False
True
The default value for this setting causes vSphere
to display a warning when there are fewer than
two datastores in the cluster. This warning is
unnecessary and misleading because the default
PowerStore X model configuration has single
vVol datastore. If this setting is changed,
vSphere displays the warning message:
The number of heartbeat datastores
for host is 1, which is less than
required: 2
Table 7. Protocol Endpoint (PE) path policy
Default vSphere value
Recommended PowerStore value
Notes
●
Path Selection Policy =
Most Recently Used
●
iops = 1000
●
No of outstanding I/Os
with competing worlds =
32
●
Path Selection Policy = Round Robin
●
iops = 1
●
No of outstanding I/Os with competing
worlds = 128
The Round Robin policy allows the optimized use
of multiple paths. The other parameter settings
are recommendations for better performance and
are based on testing. Changing these values can
cause I/O performance degradation.
Table 8. LLDP for virtual switches (vSS or vDS)
Default vSphere value
Recommended PowerStore value
Notes
Disabled
Disabled
To prevent networking problems, do not change
this setting.
Performance best practices for PowerStore X model appliances
When a PowerStore X model appliance is deployed, additional configuration changes are recommended to provide optimal
performance. These changes include:
●
Creating additional internal iSCSI targets
●
Increasing internal iSCSI queue depths
●
Enabling Jumbo frames
NOTE:
For detailed configuration steps, see KB article HOW17288
PowerStore X - Performance Best Practice Tuning
or
see the
PowerStore Virtualization Integration White Paper
.
Getting started
15