Help
Table Of Contents
- Dell EMC Storage Systems Online Help for the metro node appliance
- Contents
- Figures
- Welcome
- Using the GUI
- Configuring GUI default settings
- Using storage hierarchy maps
- Viewing system status
- Monitoring the system
- Performance
- The Performance Monitoring dashboard
- Viewing a chart
- Modifying a dashboard layout
- Creating a custom dashboard
- Removing a chart
- Moving a chart
- Back-end Bandwidth Chart
- Back-end Throughput chart
- Back-end Errors chart
- Back-end Latency chart
- CPU utilization chart
- Heap Usage chart
- Front-end Queue Depth chart
- Front-end Bandwidth chart
- Front-end Latency chart
- Front-end Throughput chart
- Front-end Aborts chart
- Write Latency Delta chart
- WAN Port Performance chart
- WAN Latency chart
- Rebuild Status dashboard
- Virtual Volumes dashboard
- Front End Ports dashboard
- System Health
- Performance
- Provisioning storage
- Guide
- Provisioning from storage volumes
- Provision Job properties
- Distributed storage
- Storage arrays
- Storage volumes
- Devices
- About devices
- Using the Devices view
- The Create Devices wizard
- The Add Local/Remote Mirror wizards
- Viewing the status of IO to a device
- Creating a device
- Renaming a device
- Deleting a device
- Mirroring a device
- Device status
- Device component properties
- Device properties
- Distributed device properties
- Add capacity to virtual volumes
- Extent properties
- Extents
- Distributed devices
- About distributed devices
- The Distributed Devices view
- The Create Distributed Device from Claimed Storage Volumes wizard
- Distributed device rule sets
- Changing the rule set for a distributed device
- Creating a distributed device
- Deleting a distributed device
- Renaming a distributed device
- Distributed Device status
- Virtual volumes
- About virtual volumes
- The Virtual Volumes view
- The Distributed Virtual Volumes view
- Creating a virtual volume
- About virtual volume expansion
- Expanding a virtual volume using storage volumes
- Enabling or disabling remote access for a volume
- Manually assigning LUN numbers to volumes
- Deleting a volume
- Renaming a volume
- Tearing down a volume
- Virtual Volume status
- Pool properties
- Virtual volume properties
- Show ITLs dialog box
- Logical unit properties
- ALUA Support field values
- Visibility field values
- Extent or Device mobility job properties
- Metro node port properties
- Storage array properties
- Storage view properties
- Storage volume properties
- Create Virtual Volumes dialog box
- Consistency group
- About consistency groups
- Using the Consistency Groups view
- Distributed Consistency Groups view
- Create Consistency Group wizard
- Types of consistency groups
- Creating a consistency group
- Adding a volume to a consistency group
- Removing a volume from a consistency group
- Deleting a consistency group
- Consistency Group status
- Consistency group properties
- Step 1: Select or create a consistency group for the virtual volume
- Step 1: Create a consistency group
- Step 2: Select volume options
- Step 3: Select a storage pool
- Step 3: Select a pool for each mirror on the second cluster
- Step 3: Select a pool for each mirror in the cluster
- Step3: Create thin virtual volumes
- Select a storage view for the virtual volume(s) (optional)
- Step 5: Review your selections
- Step 6: View results
- Step 2: Select volume options
- Step 2: Select volume options
- Step 3: Select a storage volume to create the virtual volume
- Step 3: Select a source and target storage volume
- Step 3: Create thin volumes
- Step 3: Select a target storage volume on the remote cluster
- Step 3: Select target storage on the remote cluster
- Step 6: View results
- Show Logical Units
- Exporting storage
- Initiators and metro node ports
- Storage views
- About storage views
- Using the Storage Views screen
- The Create Storage View wizard
- Creating a storage view
- Deleting a storage view
- Renaming a storage view
- Adding or removing initiators from a storage view
- Adding virtual volumes to a storage view
- Removing virtual volumes from a storage view
- Adding or removing metro node ports from a storage view
- Storage view status
- Storage group properties
- Director properties
- Cluster properties
- Moving data
- Mobility
- Move Data Within Cluster
- Move Data Across Clusters
- Create Mobility Job wizards
- Mobility job transfer size
- Creating a mobility job
- Viewing job details
- Committing a job
- Canceling a job
- Pausing a job
- Resuming a job
- Removing the record of a job
- Changing a job transfer size
- Searching for a job
- Mobility job status
- Notifications
often typical of back-ups or batch processing jobs. These spikes are not necessarily a sign of a problem. However, monitor their
height and duration, and their impact on response time.
NOTE: The chart displays data only for the directors in the cluster to which you are currently connected. To simultaneously
view statistics for another cluster, open a second browser session and connect to the second cluster.
Guidelines
Keep in mind the following guidelines when using the CPU Utilization chart:
● A completely idle system will be around 0-5% busy
● Less than 50% CPU utilization is safe
● CPU utilization of 50-80% warning
● CPU utilization of 80-90% danger
● CPU utilization of >90% critical
Corrective actions
● Consider migrating virtual volumes to less busy directors (moving them to different storage views).
● Consider adjusting the host failover driver settings to better load balance I/O across available directors.
● Stagger batch application start times causing troublesome CPU spikes (such as modify your back-up jobs schedule to start
with some delay between jobs instead of starting all back-up jobs at once, if possible.)
● Look for signs of perhaps a rogue director firmware process or thread hogging CPU time.
● If normal baseline busy is constantly high (due to high I/O load), consider an engine expansion, or a VS1 to VS2 hardware
upgrade, if possible.
Changing the view
To view the CPU utilization of a single director in your metro node system, select the director name from the Director
drop-down.
Viewing the CPU Utilization chart
1. From the GUI main menu, click Performance.
2. In the Performance Dashboard, select the tab in which you want to display the CPU Utilization chart (or create a custom
tab).
3. Click +Add Content.
4. Click the CPU Utilization chart icon.
Heap Usage chart
The Heap Usage chart shows a percentage of the heap memory used by the firmware on a director. In GeoSynchrony 5.x, the
heap size is 6GB.
The greater the number of 4KB pages storing user data that the metro node director cache needs to keep track of, the greater
the heap usage. There are safeguards in place so that the amount of information recorded about pages known by the cache will
not exceed the heap size. If the amount of information recorded gets too large, the cache layer will remove the cached pages
and knowledge about them from it's cache.
During failure recovery, the amount of heap usage initially increases, and then decreases back to normal levels once the failure is
handled. For this reason, it's important that a director's heap not get too full (< 85-90%) to account for this.
Guidelines
Keep in mind the following guidelines when using the Heap Usage chart:
● A value of around 40 to 50% is normal.
Monitoring the system
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