Administrator Guide
Table Of Contents
- Dell EMC Storage Systems Administrator Guide for PowerStore and Unity XT metro node feature
- 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
- Consistency Groups
- Performance and Monitoring
- Metro node with active-passive storage arrays
- Index
cg.drain-lat consistency-group bucket us
cg.exch-bytes consistency-group counter KB/s
cg.exch-lat consistency-group bucket us
cg.exch-pages consistency-group counter counts/s
cg.input-bytes consistency-group counter KB/s
cg.input-ops consistency-group counter counts/s
cg.inter-closure consistency-group bucket us
cg.outOfDate-counter consistency-group counter counts/s
cg.pipe-util consistency-group reading %
cg.write-bytes consistency-group counter KB/s
cg.write-lat consistency-group bucket us
cg.write-pages consistency-group counter counts/s
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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 13. 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:
● front-end-performance-stats stop - stops a running performance statistics collection.
● front-end-performance-stats start - starts a running performance statistics collection.
● front-end-performance-stats status - displays the status of front-end performance statistics collection.
NOTE: For more information on the commands, see the CLI Reference Guide for metro node.
Statistics tables
The following tables list the statistics in each category:
● Back-end fibre channel port (be-prt) statistics
● Cache statistics
● Director statistics
● Front-end director (fe-director) statistics
Performance and Monitoring
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