nfs | 易学教程

Vagrant: can't get NFS working

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问题 I'm trying to change my VagrantFile so that it uses an NFS mount instead of the default VirtualBox shared folders. I get this error message: vm: * Shared folders that have NFS enabled do not support owner/group attributes. Host path: . This is my VagrantFile: VAGRANTFILE_API_VERSION = "2" Vagrant.configure(VAGRANTFILE_API_VERSION) do |config| config.vm.box = "ktbartholomew/lamp" config.vm.network "private_network", type: "dhcp" config.vm.synced_folder ".", "/vagrant", type: "nfs" end I can't

MySQL的数据备份(脚本)

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@ TOC mysql的数据备份操作前的准备: 在mysql端安装软件: ( 为了脚本中的命令做准备 ) nfs-utils epel-release sshpass 远程主机不建议使用默认的ssh 22端口,修改成大于5位数的端口号,并做好记录. 先准备NFS服务器本地的另一台主机做NFS (172.16.14.8) [ root@backup ~ ] # yum install -y nfs-utils [ root@backup ~ ] # fdisk /dev/sda [ root@backup ~ ] # partx -a /dev/sda # 添加一个硬盘,是sdb 分区，如果空间不够，增加一个硬盘sdb [ root@backup ~ ] # pvcreate /dev/sda3 # sdb创建pv分区 [ root@backup ~ ] # vgcreate vgmysql /dev/sda3 # sdb创建vg分区 [ root@backup ~ ] # lvcreate -L 10G -n lvmysql vgmysql # sdb创建10G的lv分区 [ root@backup ~ ] # mkfs.xfs /dev/vgmysql/lvmysql # sdb的文件格式 [ root@backup ~ ] # mkdir -p /backup/51

Linux重要的服务讲述（1）

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NFS 概述 NFS（Network File System）即网络文件系统，它允许网络中的计算机之间通过TCP/IP网络共享资源。在NFS的应用中，本地NFS的客户端应用可以透明地读写位于远端NFS服务器上的文件，就像访问本地文件一样。最早由sun公司开发，是类unix系统间实现磁盘共享的一种方法工作原理如上图，当我们在NFS服务器设置好一个共享目录/data/share后，其他的有权限访问NFS服务器的NFS客户端就可以讲这个目录挂载到自己的本地，并且能看到服务端/data/share下的所有数据，NFS是通过网络来进行Server端和Client端之间的数据传输，既然走网络，双方肯定都要有端口,哪NFS Server怎么知道使用哪个端口来进行数据传输，NFS其实会随机选择端口来进行数据传输，NFS服务器是通过远程过程调用RPC（Remote Procedure Call）协议来实现的，所以，RPC管理服务端的NFS端口分配，客户端要传数据，那么客户端的RPC会先跟服务端的RPC去要服务器的端口，要到端口后，再建立连接，然后传输数据 RPC（Remote Procedure Call）——远程过程调用，它是一种通过网络从远程计算机程序上请求服务，而不需要了解底层网络技术的协议。RPC协议假定某些传输协议的存在，如TCP或UDP，为通信程序之间携带信息数据

Linux重要的服务讲述（1）

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Implications of exposing /var/lib/docker over NFS to serve hosts with limited memory

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问题 What are the implications of exporting /var/lib/docker over NFS? The idea is to store the docker images in a server and export it to hosts which has limited memory to store and run containers. This would be useful to avoid having each host download and store it's own library of docker image. The hosts may make use of FS-Cache to limit the data transfer over network. 回答1: The /var/lib/docker directory is designed to be exclusively accessed by a single daemon, and should never be shared with

using nfs network path as a kubernetes persistence volume

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问题 I have setup a kubernetes cluster with three nodes. All nodes are Linux centos machines. I need persistent volume to store data and I am trying to achive this. I was following this tutorial. But it only covers a one node cluster. https://kubernetes.io/docs/tutorials/stateful-application/mysql-wordpress-persistent-volume/ Since, my cluster consist of three node, I could not use local path. Previous tutorial does not worked for me. I need a network path and using NFS seems a reasonable solution

Hadoop HDFS

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Hadoop HDFS 概述：　　Hadoop有存储海量数据的分布式文件系统HDFS，有统一资源调度管理框架YARN，而且还有离线计算框架MapReduce。如果类比于各种操作系统，Hadoop可以认为是一个数据操作系统。Hadoop使用背景非常广泛。Hadoop实际使用几种实例；一、facebook使用 HiveQL进行数据分析，二、使用的Hive，实现淘宝搜索中的自定义筛选功能，三、使用的Pig运行Hadoop作业，实现Twitter和LinkedIn 上发现您可能认识的人功能，四、实现Amazon.com和淘宝上的商品协同过滤的推荐效果，五、Yahoo使用Hadoop，实现垃圾邮件的识别和过滤，还有用户特征建模功能。本文主要内容是解析Hadoop系统抽象的文件系统概念和分布式文件系统HDFS。一、HDFS（Hadoop Distributed File System） 1、NFS（Network File System）和HDFS（Hadoop Distributed File System）对比分析： 1、NFS是集中型文件系统，HDFS是分散型文件系统。 2、NFS文件系统的文件是存储在单一的NFS Server中，NFS Client通过网络连接可以从单一的NFS Server中获取文件同步到本地

How to run Symfony2 application on Vagrant without nfs (on Windows, for example)?

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问题 Symfony2 application is very slow when you run it with default settings on Vagrant/Windows. What one can do about it? 回答1: The best solution that I have found so far is to move vendor/ outside shared folder. It doesn't require nfs and can be done easily with two simple changes. One change in composer.json : //filename: composer.json { ... "config": { "bin-dir": "bin", "vendor-dir": "/home/vagrant/symfony2app/vendor" }, ... } and one change in app/autoload.php : //filename: app/autoload.php /*

FreeBSD iostat - How to tell if there's a problem? [closed]

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问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 8 years ago . I run a FreeBSD NFS server and recently I've been having odd issues throughout the cluster (the Apache servers are hanging in "lockf" state when loading files from the NFS share, etc). I'm fairly new to this, so my question is how can I tell if a server's IO is getting overloaded? Here is my current iostat:

How does IBM's RDZ running on a PC access the mainframe's file system?

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问题 I hear repeatedly that while NFS-style files systems are available on IBM mainframes, they are often not enabled, presumably to minimize the security risks of the mainframe vis-a-vis the rest of the world. Given that I'd like to produce PC-based tools that reach out and process files on the mainframe, this makes a simple problem ("open NFS file '\mainframe\foo'") much harder; what can I count on to provide file system access in a networked enviroment? (Linux systems offer NFS via Samba pretty

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