PowerFlex Replication initial copy report x5-10 times higher transfer size

Summary: During replication initial copy the size of the volume transfer might report x5-10 times higher than the actual volume size.

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Symptoms

Scenario

When starting volume replication, the initial copy transfer of the volume might report x5-10 times higher than the actual volume size.

In this specific example, the volume size was 9 TB and initial copy transfer reported copying 45 TB.

 

Output of

"scli --query_all_replication_consistency_group --replication_consistency_group_name RCG_test":

Initial copy progress: 15%, Capacity: 6.8 TB (6944 GB) out of 45.0 TB (46080 GB)

Real volume size reported by replication.

scli --query_all_replicated_volumes

Volume ID: 4b23391500000070 Name: test_1 Size: 9.0 TB (9216 GB)
   Pair ID: a93a69610000001f (CG ID: aec3c6370000001d)

Real volume size and volume used capacity:

[root@host1 ~]# scli --query_volume --volume_name test_1
>> Volume ID: 4b23391500000070 Name: test_1
   Provisioning: Thin
   Size: 9.0 TB (9216 GB)
   Total base user data: 1.9 TB (1902 GB)
   Storage Pool 9229a8f700000000 Name: Pool01
   Protection Domain 7137c89e00000000 Name: PD01
   Creation time: 2023-10-09 05:09:13
   Number of Direct Snapshots: 18
   Class: default
   Reads:  5 IOPS 19.2 KB (19660 Bytes) per-second
   Writes: 68 IOPS 577.0 KB (590848 Bytes) per-second
   Data layout: Fine granularity
   Compression method: Normal
   Mappings:
      Host ID: f88028a800000013 Name: Esxi1 Host Type: SDC IP: 192.168.168.25 Access Mode: READ_WRITE
      Host ID: f88028a600000011 Name: Esxi2 Host Type: SDC IP: 192.168.176.23 Access Mode: READ_WRITE
      Host ID: f88028a700000012 Name: Esxi3 Host Type: SDC IP: 192.168.176.22 Access Mode: READ_WRITE
      Host ID: f88028a500000010 Name: Esxi4 Host Type: SDC IP: 192.168.160.24 Access Mode: READ_WRITE
   No SCSI reservations
   No Nvme reservations
   The volume is a source volume of Snapshot Policy: 7e28798400000001
   Migration status: Not in migration
   Doesn't use RAM Read Cache
   Replication info:
      Replication state: Being Replicated
   Volume NVMe Namespace ID: 113

Verify a single volume being replicated output of.

"scli --query_all_replication_pairs":

CG Id: aec3c6370000001d CG Name: RCG_test
Peer System Name: test123 Direction: LOCAL_TO_REMOTE
    Local ID: a93a69610000001f Remote ID: 91991cb90000001f Copy Type: ONLINE_COPY Initial Copy State: DONE Name: (null)
    Local Volume ID 4b23391500000070 Remote Volume ID: 9c52719f00000058 Local Volume Name: test_1 Remote Volume Name: test_1_rep
    Initial Copy progress: 100% Local Activity State: REPLICATION_ENABLED

 

Impact

 This is a cosmetic issue. There is no impact aside from the reporting of the larger than expected initial transfer size.

Cause

The issue has been identified as a software code defect with the calculation of the progress during initial copy transfer.

 

Resolution

There is no resolution currently.  This is a cosmetic issue and there is no impact.

The software code defect will be fixed in future versions.

Impacted Version

3.x,
4.x

Fixed In Version

TBD

Affected Products

PowerFlex appliance connectivity, PowerFlex appliance Intelligent Catalog Software

Products

PowerFlex rack, VxFlex Ready Nodes, PowerFlex Appliance, PowerFlex custom node, ScaleIO, PowerFlex appliance R650, PowerFlex appliance R6525, PowerFlex appliance R660, PowerFlex appliance R6625, Powerflex appliance R750, PowerFlex appliance R760 , PowerFlex appliance R7625, PowerFlex custom node, PowerFlex custom node R650, PowerFlex custom node R6525, PowerFlex custom node R660, PowerFlex custom node R6625, PowerFlex custom node R750, PowerFlex custom node R760, PowerFlex custom node R7625, PowerFlex custom node R860, PowerFlex rack connectivity, PowerFlex rack HW, PowerFlex rack RCM Software, PowerFlex Software, VxFlex Ready Node, VxFlex Ready Node R640, VxFlex Ready Node R740xd, PowerFlex appliance R640, PowerFlex appliance R740XD, PowerFlex appliance R7525, PowerFlex appliance R840, VxFlex Ready Node R840 ...
Article Properties
Article Number: 000261389
Article Type: Solution
Last Modified: 18 Dec 2024
Version:  4
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