Administrator Guide
Table Of Contents
- Dell EMC Storage Systems Administrator Guide for the metro node appliance
- Contents
- Preface
- CLI Workspace and User Accounts
- Meta Volumes
- System Management
- Thin support in metro node
- Provisioning Storage
- Volume expansion
- Data migration
- About data migrations
- Migrating thin-capable storage
- About rebuilds
- One-time data migrations
- Batch migrations
- Prerequisites
- Creating a batch migration plan
- Checking a batch migration plan
- Modifying a batch migration file
- Starting a batch migration
- Pausing/resuming a batch migration (optional)
- Canceling a batch migration (optional)
- Monitoring a batch migration’s progress
- Viewing a batch migration’s status
- Committing a batch migration
- Cleaning a batch migration
- Removing batch migration records
- Configure the WAN Network
- Cluster Witness
- Consistency Groups
- Performance and Monitoring
- Metro node with active-passive storage arrays
Display available statistics
Statistics are grouped into sub-categories.
Use the monitor stat-list command followed by the <Tab> key to display the statistics sub-categories. For example:
VPlexcli:/> monitor stat-list
cache, cg, ip-congestion-control, director, wrt-pacing, io-sequencer,,com-path,,com-
io-group, be-prt virtual-volume, rp-spl-vol, host-init, directory, fe-director, com-
endpoint, rp-spl-node, fe-prt,
com-cluster-o, io-sequencer-vol, storage-volume, fe-lu ramf, ip-com-port
Use the --categories categories option to display the statistics available in the specified category. For example:
VPlexcli:/monitoring> monitor stat-list --categories director
Name Target Type Units
--------------------- ------ ------- --------
director.be-aborts n/a counter counts/s
director.be-ops n/a counter counts/s
director.be-ops-read n/a counter counts/s
director.be-ops-write n/a counter counts/s
director.be-read n/a counter KB/s
.
.
.
Use the * wildcard to display all statistics for all categories.
For example:
VPlexcli:/> monitor stat-list *
Front-end performance statistics
Metro node collects detailed performance statistics on its virtual volumes, which primarily includes the Read and Write statistics
with the I/O size and the LBA information. You can use this data to identify and resolve any I/O performance issues with metro
node.
This feature is enabled in metro node by default. The collected statistics is available in the
fe_perf_stats_<timestamp>.log file at the /var/log/VPlex/cli/ folder. The file includes these details:
Table 14. Front-end performance statistics
Field Description
vol Name of the virtual volume
Enabled queue Name of the queue
pos Serial number of the task in the queue
I WWN of Initiator port
T WWN of target port
status Internal status or the Cache status
time The time for which the I/O task has been running (In usec)
opcode Operation code of the command (if applicable)
LBA Value of the logical block addressing (LBA) element in the
command (if applicable)
len Blocks or bytes that are being transferred or verified (if
applicable)
To manage the performance the front-end statistics collection, use these commands at any metro node CLI context:
100
Performance and Monitoring