hdfs

Summary the theoretical knowledge of data backup and HDFS .

对数据备份以及HDFS的相关理论知识进行了综述。

Their focus is now on developing Hadoop 's distributed file system , HDFS

现在他们的重点是开发Hadoop的分布式文件系统，HDFS

After a survey of the OA system , HDFS is used as cloud storage system .

经过对OA系统的调研，本文采用HDFS作为云存储系统。

From the perspective of an end user , HDFS appears as a traditional file system .

从最终用户的角度来看，HDFS就像传统的文件系统一样。

HDFS is designed to store large files with good reliability and scalability at the first .

最初的HDFS被设计为适合存储大文件的文件系统，其在存储大文件时具有良好的可靠性和拓展性。

It stores each block of HDFS data in a separate file in its local file system .

它把每个HDFS数据块存储在本地文件系统上隔离的文件中。

Hadoop implements a distributed file system , referred to the HDFS .

Hadoop实现了一个分布式文件系统，简称HDFS。

In order to use Hadoop to analyze your data , you need to get the data into HDFS .

为了使用Hadoop来分析您的数据，您必须将数据放在HDFS上。

Based on the above background , the paper designs HDFS distributed file system based on the Infiniband network .

基于上述背景，本文设计实现了基于Infiniband网络的HDFS分布式文件系统。

HDFS applications need a write-once-read-many access model for files .

HDFS应用对文件要求的是write-one-read-many访问模型。

HDFS is designed to reliably store very large files across machines in a large cluster .

数据复制HDFS被设计成在一个大集群中可以跨机器地可靠地存储海量的文件。

Once done , you 'll have two text files in HDFS ready to be processed .

完成之后，在HDFS中就有两个文本文件等待处理。

But first , format your Hadoop File System ( HDFS ) using the hadoop command .

但是，首先使用hadoop命令对HadoopFileSystem（HDFS）进行格式化。

Releasing federated storage across HDFS instances , in the next major Hadoop release

在Hadoop的下一个主要版本将会发布跨HDFS实例的联合存储

It provides metadata services within HDFS .

它在HDFS中提供元数据服务。

In this example we assume that there is a directory in HDFS for every day .

在这个示例中，我们假设在HDFS中有针对每个日期的目录。

HDFS has a high fault tolerance features , and designed to deploy in a low-cost hardware .

HDFS有着高容错性的特点，并且设计用来部署在低廉的硬件上。

All HDFS communication protocols are layered on top of the TCP / IP protocol .

通讯协议所有的HDFS通讯协议都是构建在TCP/IP协议上。

In addition to the traditional file system , GDM also supports modeling and retrieval of unstructured data in HDFS .

除传统文件系统外，GDM还支持对HDFS中的非结构化数据建模和检索。

The result obtained through experiments , we can see that the improved HDFS in the three tests have shown a better performance .

通过实验得出的数据，可以看出改进后的HDFS在这三个测试中都表现出了更好的性能，从而证明了本文的改进方法是有效的。

Then , in-depth study Hadoop Distributed File System ( HDFS ) and the distributed computing model ( Map / Reduce ) .

然后，深入研究Hadoop平台的分布式文件系统（HDFS）和分布式计算模型（Map/Reduce）。

The HDFS client software implements checksum checking on the contents of HDFS files .

HDFS客户端软件实现了HDFS文件内容的校验和。

Because HDFS has a single point of failure ( the name node ), it is a risk for a high availability production system .

因为HDFS有一个单点故障（Name节点），这对高可用性生产系统来说是个风险。

The complete introduction to HDFS and how to operate on it is beyond the scope of this article .

对HDFS及其使用方法的完整介绍超出了本文的范围。

When an application is submitted , input and output directories contained in the HDFS should be provided .

在提交应用程序时，应该提供包含在HDFS中的输入和输出目录。

Hadoop distributed file system ( HDFS ) is designed as a file system which is suitable for running on generic hardware .

Hadoop分布式文件系统HDFS（HadoopDistributedFileSystem）被设计成适合运行在普通硬件上的文件系统，它为Hadoop分布式计算存储提供底层支持。

Hadoop itself provides the ability to copy files from the file system into the HDFS and vice-versa .

Hadoop本身也提供将文件从文件系统复制到HDFS的功能，反之也可以。

Meanwhile , We study the influence on the interacting of data and load balancing by data redundancy mechanism in HDFS . 5 .

同时，深入研究了数据冗余机制对数据交互以及负载均衡的影响。

Note the format below , which moves the source file to the HDFS subdirectory ( input ) .

注意，下面的命令格式把源文件转移到HDFS子目录（input）中。

Since HDFS is not suitable for storing small files , the system uses the combined means of small files in the cloud storage file .

由于HDFS不适合存储小文件，本系统采用将小文件合并的方式在云端存储文件。