Log-less metadata management on metadata server for parallel file systems.
Log-less metadata management on metadata server for parallel file systems.
复制标题
并行文件系统元数据服务器上的无日志元数据管理
DOI：
10.1155/2014/813521
复制
发表时间：
2014
影响因子：
--
通讯作者：
Peng X
中科院分区：
文献类型：
--
作者：
Liao J;Xiao G;Peng X
提出了一种新的并行分布式文件系统元数据服务器（MDS）元数据管理机制。在该技术中，客户端文件系统备份已由元数据服务器处理的发送的元数据请求，使得MDS不需要将元数据改变记录到非易失性存储器，以实现高可用的元数据服务，以及更好地提高元数据处理的性能。由于客户端文件系统将某些发送的元数据请求备份在其内存中，因此处理这些备份请求的开销比元数据服务器带来的开销小得多，而它采用日志记录或日志记录来产生高可用的元数据服务。实验结果表明，与传统的元数据管理机制，即MDS上的日志或日志记录相比，该机制可以显著提高元数据处理的速度，并提供更好的I/O数据吞吐量。此外，当元数据服务器崩溃或异常进入非操作状态时，可以通过重播所有相关客户端缓存的备份日志来实现完整的元数据恢复。
This paper presents a novel metadata management mechanism on the metadata server (MDS) for parallel and distributed file systems. In this technique, the client file system backs up the sent metadata requests, which have been handled by the metadata server, so that the MDS does not need to log metadata changes to nonvolatile storage for achieving highly available metadata service, as well as better performance improvement in metadata processing. As the client file system backs up certain sent metadata requests in its memory, the overhead for handling these backup requests is much smaller than that brought by the metadata server, while it adopts logging or journaling to yield highly available metadata service. The experimental results show that this newly proposed mechanism can significantly improve the speed of metadata processing and render a better I/O data throughput, in contrast to conventional metadata management schemes, that is, logging or journaling on MDS. Besides, a complete metadata recovery can be achieved by replaying the backup logs cached by all involved clients, when the metadata server has crashed or gone into nonoperational state exceptionally.
影响因子：
1.5
作者：
Ganger, GR;McKusick, MK;Patt, YN
通讯作者：
Patt, YN