分布式存储解决方案-dCache
2012-07-21 22:57:13 
阿炯
dCache是一个分布式的存储解决方案。它组织多台电脑的存储，合并后可用于存储数据;最终用户只是看到了大量的存储空间。由于最终用户不必知道 哪台计算机上的数据存储，其数据可从一台计算机迁移到另一台没有任何中断的服务。这使得计算机dCache存储将要采取的服务或额外的 机器(附加存储)，以增加在不中断服务的最终用户体验。
The goal of this project is to provide a system for storing and retrieving huge amounts of data, distributed among a large number of heterogenous server nodes, under a single virtual filesystem tree with a variety of standard access methods. Depending on the Persistency Model, dCache provides methods for exchanging data with backend (tertiary) Storage Systems as well as space management, pool attraction, dataset replication, hot spot determination and recovery from disk or node failures. Connected to a tertiary storage system, the cache simulates unlimited direct access storage space. Data exchanges to and from the underlying HSM are performed automatically and invisibly to the user. Beside HEP specific protocols, data in dCache can be accessed via NFSv4.1 (pNFS) as well as through WebDav.
授权协议： LGPL
最新版本：2.2
gPlazma 1 is now implemented as a plugin for gPlazma2.
Java Authentication and Authorization Service (JAAS) password authentication was added.
The default partition type in the PoolManager was changed to WAAS.
The NFSv4.1 door now shows some statistical information.
Renaming was added to the FTP implementation.
Support for changing mode, owner, and group of a directory tag was added.
SRM now always listens for SSL connections.
Login monitoring was added to gPlazma2
官方主页：http://www.dcache.org/index.shtml