Fastdfs comparison

ftp: can set a password for high file security (if the password program is difficult to access), can resume uploading from a breakpoint, non-expandable, no disaster recovery
HDFS: suitable for large file storage, cloud computing, not very suitable for simple small file storage (efficiency Not high)
TFS: from Taobao, suitable for massive files less than 1M, relatively troublesome to use, relatively few documents
GlusterFS: powerful and flexible, suitable for large files, support for multiple data types, troublesome to use, high hardware requirements, at least two Nodes, less Chinese data
mogileFS: similar to FastDFS architecture, FastDFS refers to mogileFS, FastDFS is more efficient than mogileFS
FastDFS: from Taobao, suitable for massive small files (recommended range: 4KB < file_size <500MB), relatively simple to use, small files FastDFS is mostly recommended on the storage network.

FastDFS:
Advantages
1) Reduce the complexity of the system, higher processing efficiency
2) Support online capacity expansion mechanism, enhance the scalability of the system
3) Implement soft RAID, enhance the concurrent processing capability and data of the system Fault- tolerant recovery capability
4) Support master-slave files, support custom extensions
5) Master and backup Tracker services, enhance the availability of the system

Disadvantages
1) Does not support resuming uploads, not suitable for large file storage
2) Does not support POSIX (portable operation) System interface) Common interface access, low versatility
3) There is a large delay in the synchronization of files across the public network, and corresponding fault tolerance strategies need to be applied
4) The synchronization mechanism does not support file correctness verification, which reduces the availability of the system
5) Download through API, there is a single point of performance bottleneck
6) Do not provide permission control directly, you need to implement it yourself

Summary : Compared with other common open source distributed file systems, FastDFS is not perfect, but it is more suitable for the needs of small files.