Picture Storage System TFS

1 TFS and GFS Comparisons

Application Scenarios for 1.1 GFs

First, millions other files, and is large files, files are more than 100MB, 1G-level files are very common.

Second, the cluster is built on a commercial computer, not reliable, monitoring the state of each node, when a node is broken, can be restored inside. Therefore, a master is required to manage multiple slave.

1.2 Application Scenarios for TFS

First, company aims Yangzhou other small files, especially picture files, size is about 18KB.

Second, clusters are also built on commercial computers.

2 integrity of the data

First, backup;

Second, divide the data into chunk and block, calculate the checksum of each block;

Thirdly, checksum is placed in log, log and data are stored separately;

IV, check the checksum before transmitting the data, find the error, delete the error data, copy the backup data.

3 flat design of TFS

TFS lost the directory structure, directly with the file name to resolve the block ID and file ID, directly get the physical address of the files, can greatly improve the speed of access.

4 TFS fulfills the idea of object storage

Picture Storage System TFS