Introduction to ZTE CSS2000 Distributed Storage

  • 1.Product Introduction

    ZTE CSS2000 distributed storage is an independently-developed massive non-structured data storage product that can economically and efficiently store and manage massive file data. It is applicable to scenarios requiring big capacity, high throughput, and high reliability. 
    The ZTE CSS2000 system architecture consists of the hardware resource layer, storage software layer, and business application layer. The hardware resource layer contains hardware resources that are used by a distributed storage system. CSS2000 adopts the decentralized architecture design and X86 storage servers, and supports software and hardware decoupling. The storage software layer contains software resources used by the system. Through software virtualization, the CSS2000 system virtualizes physical storage space physical storage space on storage servers into a unified user data storage resource pool and a system Metadata storage resource pool. It features distributed architecture, high capacity, high performance, high reliability, elastic scaling, and low TCO, and provides standard NFS, CIFS, POSIX, FTP, and S3 interfaces to provide storage service for applications. The business application layer contains specific business applications such as digital images, media assets, video surveillance, mailbox, cloud storage, and cloud backup.

    2.Product Architecture

    3.Highlighted Features

    (1)Use the decentralized design so that the system has no single-node fault and the breakdown of any device cannot affect the service.  
    (2)Support the file duplication, RAID cross-node redundancy strategy so that the data is not lost and read/write is not interrupted in the case that multiple hard disks or servers break down.  
    (3)Support the cold/hot tiered storage by storing the frequently-requested data into the high-performance SSD hard disks and cold data into the low cost big capacity SATA hard disks to promote the hot data access performance.   
    (4)Support the dynamic scaling by adding nodes online to expand the storage capacity and CPU processing capability without service interruption. Both the storage capacity and system throughput can increase in a linear mode.  
    (5)Use a globally single name space to ensure that each storage service node has the same data storage capability and system management capability.  
    (6)High availability. When a single machine breaks down, the service on it can be automatically taken over by other nodes so that the service of the whole system is not affected.    
    (7)Support the storage domain deployment across the data center, realize remote backup disaster recovery, and then ensure system reliability to avoid the problem that the whole system cannot provide services upon power-off of the equipment room, and main network fault or disaster.  
    (8)Support one-click automatic batch installation, upgrade, and inspection to significantly shorten the installation, upgrade, or inspection period and improve system maintainability.  

    (9)Support network plane separation. The networks of the control plane, service plane, and data plane are separated and isolated by VLAN. It also supports binding network accesses in the form of load balance or active-standby.

    4.Technical Specifications 



    Storage and metadata node

    X86 universal storage server

    Supported interface protocol


    Disk specification  

    2.5/3.5-inch SATA/SAS/SSD disk  

    Recommended number of disk slots on a single node


    Maximum number of domains

    128 for a name space

    Scale of a single domain

    4 billion files, capacity of over10PB  

    System scale

    Hundreds of billions of files, capacity of over 100PB

    Number of the minimum nodes of a commercial office

    2 (copy)/3 (EC)

    Number of the maximum storage nodes supported by a single domain


    Number of the maximum storage nodes supported by the system


    Maximum number of copies


    Network RAID N+M ratio

    Adjustable. Recommend 8+2, 6+2 

    Switching system

    GE, 10GE, InfiniBand (56Gps, 168Gps)

    System bandwidth performance

    > 6.5GB/s (valid capacity per PB)

    System OPS

    > 70,000 (valid capacity per PB)

    Mean response time to the 4KB file under the maximum 80% OPS pressure


    Data reconstruction time ≤60 minutes per TB

    5.Application Scenarios 

    The ZTE CSS2000 distributed storage is mainly used for scenarios such as unified storage resource pool, video surveillance, media assets cloud storage, and medical images storage.


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