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Dell PowerVault MD 32XX/36XX Series Storage Arrays CLI Guide

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Save Remote Replication Group Statistics

Description

This command saves to a file the synchronization statistics for one or more member virtual disks in a remote replication group. The statistics collected are available only for remote replication group member virtual disks in a primary role on the local storage array.

A set of data is collected during the synchronization process that can be used to evaluate how well the replication configuration is functioning. The data is collected as a set of samples. A sample is created at the beginning of a synchronization process and updated regularly while the synchronization process proceeds.

A sample collects data until the synchronization process completes or until a disruption to the synchronization process occurs such as a virtual disk ownership transfer or a read-write error. When a synchronization process disruption is resolved (for example, the virtual disk is transferred to the alternate RAID controller module), a new sample is created and updated as the synchronization process continues.

Syntax

save storageArray arvmStats asyncRemoteReplicationGroup ["
                                 asyncRemoteReplicationGroupName"]
                                 arvmStats file="
                                 filename"
                                 [virtualDisk="
                                 virtualDiskName"
                                 sampleType=(all | mostRecent | longestSyncTime | errors)
                                 recordLimit=(1-90)]

Parameters

Parameter Description
asyncRemoteReplicationGroup The name of the remote replication group for which you are retrieving synchronization statistics. Enclose the remote replication group name in square brackets ([ ]). If the remote replication group name has special characters, you also must enclose the remote replication group name in double quotation marks (" ") inside square brackets. If the remote replication group name consists only of numbers, such as "1002," you also must enclose the remote replication group name in double quotation marks (" ") inside square brackets.
file The file path and the file name to which you want to save the synchronization statistics. Enclose the file name in double quotation marks (" "). For example: file="C:\Program Files\CLI\logs \iscsistat.csv"

This command does not automatically append a file extension to the saved file. You can use any file name, but you must use the .csv extension.

virtualDisk This parameter is optional. The name of the specific member virtual disk in the remote replication group for which you are retrieving synchronization statistics. If no virtual disk is specified, the statistics for every member virtual disk in the remote replication group are saved.

If statistics are collected for more than one virtual disk in a remote replication group, all the data will be written to the same file.

Enclose the virtual disk name in double quotation marks (" ").

sampleType This parameter is optional. The default value for sampleType is all.
  • all—Data for all three sample types are collected and written to the same file.
  • mostRecent—Statistics are recorded for the most recent 50 resynchronization samples.
  • longestSyncTime—Statistics are collected for the most recent 20 longest resynchronization samples.
  • errors—Statistics are recorded for the most recent 20 failed resynchronization samples. These samples include a failure code.
recordLimit This parameter is optional. The default value for record limit is no limit. The recordLimit must be greater than 0 and less than or equal to 90.

Notes

Statistics are captured for replicated virtual disks in the Primary role. The statistics collected include the following data:
  • Synchronization start time
  • Synchronization type (manual or periodic)
  • Synchronization duration
  • Number of bytes sent
  • Maximum write time (for a single write)
  • Minimum write time (for a single write)
  • Minimum synchronization data rate
  • Maximum synchronization data rate
  • Total write time
  • Repository utilization (%)
  • Recovery point age
During initial synchronization, statistics samples are captured approximately every 15 minutes.

The synchronization statistics are included in the support bundle.

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