Differences between ROW and COW of the OceanStor V3 Series


Redirect-on-write (ROW) retains old data for snapshots. Unlike copy-on-write (COW), ROW uses one less write operation. However, for ROW, fragments are generated after data is read and written for a long period. As a result, consecutive spaces cannot be allocated to multiple sequential I/Os or the I/Os will become random. You can optimize the working mechanism by running fragment management in the background.

Other related questions:
Differences between Dorado series and V3 series
The OceanStor Dorado5000 V3 and Dorado6000 V3 storage systems combine a superior hardware structure and an all-flash software architecture with advanced data application and protection technologies. They offer flexible scalability, proven reliability, and high availability, meeting medium- and large-sized enterprises' storage requirements for excellent performance. For details, see: Highlights.

Difference between V3 and 18000
The difference between the V3 and 18000 storage is as follows: The V3 storage is mid-tier to high-end storage and 18000 high-end storage provides higher performance.

Differences between V2 and V3 servers
V3 servers differ from V2 servers in the following aspects: ? V3 servers use the latest Intel? Xeon? E5-2600 v3 series processors, with up to 18 cores per processor. ? V3 servers use the new-generation iBMC management system (with Huawei-developed management chips) for more secure and convenient management. In addition, V3 servers provide higher performance, PCIe expansion capabilities, and expanded memory size. For details, see the server user guide.

Difference between the RH5885 V2, RH5885 V3, and RH5885H V3
Visit http://support.huawei.com/huaweiconnect/enterprise/thread-230857.html.

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