Hardware |
System Architecture |
Asymmetric distributed architecture |
Number of nodes |
2 to 160 |
Form Factor |
4U rack server |
Processor |
Inter IvyBridge 4 cores |
Data Disk Type |
2.5-inch/3.5-inch SATA and SAS enterprise HDD
1TB/2TB/3TB/4TB/6TB |
Number of Disks |
24 |
Storage Network type |
4 x 1 GE, load balancing |
Other interfaces |
1 x USB3.0, 1 x eSATA, 2 x SAS, 1 x RS232, 1 x RS485, 1 x 1GE management interface |
System Architecture |
Cluster Architecture |
Distributed objective storage architecture |
Distributed Storage |
Erasure coding technology, data is segmented and saved in multiple storage nodes |
Data Protection Level |
Dynamic N+M mode: 1+1, 4+1, 8+2, 12+3, 16+4, data is still usable after M storage nodes fail |
File System |
File System |
Dahua EFS distributed file system |
Data Type |
Video, image and document |
File-level Access |
Global namespace, fIle can be accessed by 3rd party application directly |
Load Balancing |
Load balancing based on capacity and performance of each node |
Data Recovery |
Valid data recovery instead of entire disk recovery |
Scalability |
Storage Expansion |
Scale-out technology, online expansion, with less than 60 seconds for expansion of a single node |
Quota Management |
Data quota management based on users, user groups and directories, allocation of capacity on demand |
Performance Index |
Read/write Performance |
Sequence read/write: 4 GB/s |
80% read, 20% write: 3.5GB/s |
20% read, 80% write: 3.5GB/s |
50% read, 50% write: 4GB/s |
Data Recovery Speed |
2 TB/h |
Stream Processing Performance |
Number of video channel: 2000/node |
Storage bandwidth: 700Mbps/node |
Fowarding bandwidth: 700Mbps/node |