https://support.microsoft.com/en-us/help/159865  https://support.microsoft.com/en-us/help/244780/information-about-event-id-51   This article applies to Windows 2000. Support for Windows 2000 ends on July 13, 2010. The Windows 2000 End-of-Support Sol…

struct tagDrives { WCHAR letter; WCHAR volume[ BUFFER_SIZE ]; } g_drives[ ]; // WCHAR GetUSBDrive( ) { LPTSTR lpDevID; WCHAR cDrive; DWORD dwSize = BUFFER_SIZE; // Get all removable disks on user laptop. if ( !GetAllRemovableDisks( ) ) { WRITELOG( "E…

1,新建文件硬盘 qemu-img create -f qcow2 testdisk.img 2G…

When managing a VM Guest on the VM Host Server itself, it is possible to access the complete file system of the VM Host Server in order to attach or create virtual hard disks or to attach existing images to the VM Guest. However, this is not possible…

五,管理虚拟存储 5.1 虚拟磁盘概述 5.1.1 虚拟化项目中存储的注意事项 [x] 存储的性能几乎总是虚拟化的瓶颈 [x] 通过多个硬盘驱动以分布磁盘I/O来实现存储解决方案 [x] 考虑部署集中化的SAN/NFS来实现高可用性和实时迁移 5.1.2 KVM存储模式 [x] 基于文件系统的存储 dir:Filesystem Directory 虚拟文件系统目录 fs:Pre-Formatted Block Device netfs:Network Exported Directory [x]…

1. 需要的依赖关系未安装 The required dependency 'apt (>= 1.0.1ubuntu2.13)' is not installed. http://forum.ubuntu.org.cn/viewtopic.php?t=479718 尝试: 1)保持软件源指向 14.04(trusty) 不变 2) sudo apt-get update && sudo apt-get upgrade 此时 apt 应已升级到 1.0.1ubuntu2.13参考 ht…

五,管理虚拟存储 5.1 虚拟磁盘概述 5.1.1 虚拟化项目中存储的注意事项 [x] 存储的性能几乎总是虚拟化的瓶颈 [x] 通过多个硬盘驱动以分布磁盘I/O来实现存储解决方案 [x] 考虑部署集中化的SAN/NFS来实现高可用性和实时迁移 5.1.2 KVM存储模式 [x] 基于文件系统的存储 dir:Filesystem Directory 虚拟文件系统目录 fs:Pre-Formatted Block Device netfs:Network Exported Directory [x]…

五,管理虚拟存储 5.1 虚拟磁盘概述 5.1.1 虚拟化项目中存储的注意事项 [x] 存储的性能几乎总是虚拟化的瓶颈 [x] 通过多个硬盘驱动以分布磁盘I/O来实现存储解决方案 [x] 考虑部署集中化的SAN/NFS来实现高可用性和实时迁移 5.1.2 KVM存储模式 [x] 基于文件系统的存储 dir:Filesystem Directory 虚拟文件系统目录 fs:Pre-Formatted Block Device netfs:Network Exported Directory [x]…

An apparatus for performing network function virtualization (NFV), comprising: a memory, a processor coupled to the memory, wherein the memory includes instructions that when executed by the processor cause the apparatus to perform the following: rec…

A cloud system may create physical resource tags to store relationships between cloud computing offerings, such as computing service offerings, storage offerings, and network offerings, and the specific physical resources in the cloud computing envir…

Summary File I/O on Microsoft Windows can be synchronous or asynchronous. The default behavior for I/O is synchronous, where an I/O function is called and returns when the I/O is complete. Asynchronous I/O allows an I/O function to return execution b…

一,使用 Performance counter 监控Disk IO问题 1,Physical Disk vs. Logical Disk Windows可以在一个Physical Disk上划出若干个逻辑分区,每一个逻辑分区是一个Logical Disk.对于分配在同一个Physical Disk上的Logical Disks,其读写操作共享Physical Disk的IO带宽.Windows给每一个Logical Disk分配一个盘符,App通过盘符来读写数据. 关于Disk Perform…

==============================================================================================================NAS1> rdfile /etc/quotas# path type hard-limit hard-files threshold-90% soft-80% soft-files/vol/vol1/data1 tree 1835g - 1651g 1460g - ======…

Physical Disk: 单次IO大小 Avg.Disk Bytes/Read Avg.Disk Bytes/Write IO响应时间 Avg.Disk sec/Read Avg.Disk sec/Write IOPS DiskReads/sec DiskWrites/sec DiskTransfers/sec IO吞吐率 DiskBytes/sec DiskRead Bytes/sec DiskWrite Bytes/sec 磁盘有两个重要的参数:Seek time.Rotational…

http://www.usblyzer.com/usb-human-interface-device-hid-class-decoder.htm   Human Interface Device (HID) Class Decoder Human Interface Device (HID) class is one of the most frequently used USB classes. The HID class consists primarily of devices that…

centos -- how to add a new disk into a mdadm raid5 /dev/md0 which lost a /dev/sdc1 disk and  revoery at another machine? fdisk -l mdadm --stop /dev/md0 # to force active the raid by remaind 3 disks. mdadm -A --force /dev/md0 /dev/sdb1 /dev/sde1 /dev/…

ES索引文件瘦身总结如下: 原始数据:(1)学习splunk,原始data存big string(2)原始文件还可以再度压缩倒排索引:(1)去掉不必要的倒排索引信息:例如文件位置倒排._source和field store选择之一(2)合并倒排文件,去掉一些冗余的小文件(3)原始数据big string存储后负责ES聚合功能的doc_values去掉(4)其他方面:倒排列表数据结构是skiplist本质是空间换时间,可考虑用有序数组存储. Strange that I haven't recei…

https://db-blog.web.cern.ch/blog/luca-canali/2014-12-life-oracle-io-tracing-logical-and-physical-io-systemtap Luca Canali on 01 Dec 2014 Topic: This post is about tracing logical and physical reads in Oracle using SystemTap. You find here a few examp…

直接 上配置: 1.配置文件 cat userparameter_harddisk.conf #discovery hard diskUserParameter=custom.vfs.discovery.diskname,/opt/app/zabbix-agent/scripts/check_harddisk.sh diskname_discovery#disk status# See https://www.kernel.org/doc/Documentation/ABI/testing/pr…

Problem: While restoring controlfile to test environment, from filesystem or tape environment after installing grid infrastructure. I got following errors from both RMAN  and DBCA, despite the fact that I could create directory alias in asmcmd. RMAN>…

Problem adding USB host device to KVM Windows guest machine. Status: CLOSED CURRENTRELEASE   Aliases: None   Product: Fedora Component: qemu (Show other bugs) Version: 18 Hardware: x86_64 Unspecified   Priority unspecified Severity unspecified Target…

专题文档汇总目录 Notes:从概念层次描述了tick-comm.oneshot tick.broadcast tick:重点介绍了tick和tickless概念及其区别,两种tick device:periodic tick和oneshot tick:周期性时钟是如何运作的:高精度情况下,dynamic tick运作. 原文地址:Linux时间子系统之(十三):Tick Device layer综述 一.前言 时间子系统中的tick device layer主要涉及kernel/time/ti…

一.前言 时间子系统中的tick device layer主要涉及kernel/time/tick-*相关的文件,本文的主要内容就是从high level层次(不纠缠在具体的每行代码)描述tick device layer的运作逻辑. 如果说每个.c文件是一个模块的话,我们可以首先简单描述tick device layer的各个模块.tick-common.c描述了tick device的一些通用操作,此外,该文件还包括了周期性tick的代码.想要让系统工作在tickless mode(更准确应…

11.2 Data Guard Physical Standby Switchover Best Practices using SQL*Plus (Doc ID 1304939.1) APPLIES TO: Oracle Database - Enterprise Edition - Version 11.2.0.1 and laterOracle Database Cloud Schema Service - Version N/A and laterOracle Database Exad…

vyos User Guide 来源 https://wiki.vyos.net/wiki/User_Guide The VyOS User Guide is focused on providing a general overview of the installation, configuration, and operation of the VyOS network operating system. Introduction VyOS is a Linux-based network…

Help on module guestfs: NAME guestfs - Python bindings for libguestfs FILE /usr/lib64/python2.7/site-packages/guestfs.py DESCRIPTION import guestfs g = guestfs.GuestFS(python_return_dict=True) g.add_drive_opts("guest.img", format="raw"…

About psutil (python system and process utilities) is a cross-platform library for retrieving information on running processes and system utilization(CPU, memory, disks, network, sensors) in Python. It is useful mainly for system monitoring, profilin…

Introduction Log files are files that contain messages about the system, including the kernel, services, and applications running on it. There are different log files for different information. For example, there is a default system log file, a log f…

有关某个命令的详细信息,请键入 HELP 命令名ASSOC 显示或修改文件扩展名关联.ATTRIB 显示或更改文件属性.BREAK 设置或清除扩展式 CTRL+C 检查.BCDEDIT 设置启动数据库中的属性以控制启动加载.CACLS 显示或修改文件的访问控制列表(ACL).CALL 从另一个批处理程序调用这一个.CD 显示当前目录的名称或将其更改.CHCP 显示或设置活动代码页数.CHDIR 显示当前目录的名称或将其更改.CHKDSK 检查磁盘并显示状态报告.CHKNTFS 显示或修改启动时间…

很明显,以下的文字来自微软MSDN 链接http://msdn.microsoft.com/en-us/library/windows/desktop/ms681382(v=vs.85).aspx MSDN上分成了几个部分,查起来费事,统一放在这里了. 用kernel32.dll里的FormatMessage可以得到支持多语言的返回消息 有人把这些错误代码整理成了类,供参考 http://www.cnblogs.com/Sabre/p/3929264.html Note The informat…