Storage pools of OceanStor Dorado V3

Dear Lucas,

Dorado supports one pool by dual controllers or 4 controllers, and the logical space management unit is 8 KB I/O block. In this case, Dorado V3 achieves the highest performance and optimal data reduction ratios (better than any other mainstream products in the industry, including Pure Storage). When adopting 32 KB I/O blocks, Dorado V3 underperforms counterparts of Pure Storage.

Huawei plans to launch a version with adjustable logical space management units by the end of 2017, facilitating competition against Pure Storage in the large I/O market.

Note:

8 KB I/O blocks are applicable to database services, and 32 KB applies to comprehensive services such as Exchange.

Any further questions, let us know!

Not sure about the total numbers, but you can create hundreds of pools depending on your disk domain size. Same thing goes disk domains

Planning Storage Pools
Before using a storage system, create storage pools to provide storage space. The RAID policies of the storage pools must be properly planned for better storage utilization.

Dorado V3 storage systems use dynamic RAID for redundancy and provide different levels of protection based on the number of parity bits in the RAID group. Table 3-3 describes RAID 5, RAID 6, and RAID-TP provided by storage systems when hot spare space is not considered.

Table 3-3 RAID levels
RAID Level

Number of Parity Bits

Redundancy and Data Recovery Capability

Maximum Number of Allowed Faulty Disks

RAID 5

1

Relatively high. Parity data is distributed on different chunks. In each chunk group, the parity data occupies the space of one chunk. RAID 5 is able to tolerate the failure on only one chunk. If two or more chunks fail, RAID 5 protection can no longer be provided.

1

RAID 6

2

High. Parity data is distributed on different chunks. In each chunk group, the parity data occupies the space of two chunks. RAID 6 is able to tolerate simultaneous failures on two chunks. If three or more chunks fail, RAID 6 protection can no longer be provided.

2

RAID-TP

3

High. Parity data is distributed on different chunks. In each chunk group, the parity data occupies the space of three chunks. RAID-TP is able to tolerate simultaneous failures on three chunks. If four or more chunks fail, RAID-TP fails.

3

thanks