[Physical (Raw) Versus Logical Backups] Physical backups consist of raw copies of the directories and files that store database contents. This type of backup is suitable for large, important databases that need to be recovered quickly when problems o…

Processor Groups https://docs.microsoft.com/en-us/windows/desktop/ProcThread/processor-groups The 64-bit versions of Windows 7 and Windows Server 2008 R2 and later versions of Windows support more than 64 logical processors on a single computer. This…

原文地址: http://www.daniloaz.com/en/differences-between-physical-cpu-vs-logical-cpu-vs-core-vs-thread-vs-socket/ 水平所限,翻译不准确的地方望指正. 当我们使用像 nproc或者 lscpu等命令 来在CPU级别上获取计算机的架构和性能的时候,我们常常会发现我们不能够正确的解释这些命令的结果,原因在于我们搞不清楚一些术语的含义,例如: 物理CPU (physical CPU). 逻辑CPU(…

1.物理读:从disk到buffer cache.其产生的主要原因是: (1) 在数据库高速缓存中不存在这些块 (2) 全表扫描 (3)磁盘排序 2.oracle中读写disk的单位是block.而用户需要的是其中几行或几列,从buffer cache中提取行(列)的过程,就是逻辑读 (1)当前读:读取block中的最新数据 (2)一致读:为保证一致性,buffer cache中的block 都会有最后一次修改时的scn, 当某个进程读取block时,把进程的scn与block的scn比较 进程…

Physical(Raw) and Logical Backup: 1.Physical backups consist of raw copies of the directories and files that store database contents. This type of backup is suitable for large, important databases that need to be recovered quickly. 2.Logical backups…

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…

Cellebrite 两周前正式发布了UFED设备所附带的Physical Analyzer和Logical Analyzer软件,更新后版本为3.8 下载地址已更新至置顶资源下载页面. 主要更新如下: 支持针对iOS设备的文件系统转储,可以提取电子邮件内容 内置了在线地图,所有地理位置可以直接展示 支持对iOS尝试验证复杂密码 UFED Physical Analyzer and UFED Logical Analyzer 3.8 bring a host of new decoding an…

Oracle的DATAGUARD环境,有PHYSICAL STANDBY和LOGICAL STANDBY两种.PHYSICAL STANDBY是传输REDO传到Standby端,然后由Standby端的MRP进程应用该Redo,以达到同期效果.LOGICAL STANDBY是传输REDO传到Standby端,然后由Standby端的LSP进程调用LogMiner来抽取SQL文,然后执行该SQL文以达到同期效果.这里介绍一个简单的确认同期状况的方法: ODM TEST CASE==========…

Appendices Published: April 27, 2005 On This Page Appendix A: SQL Server for Oracle Professionals Appendix B: Getting the Best Out of SQL Server 2000 and Windows Appendix C: Baselining Appendix D: Installing Common Drivers and Applications Installing…

61. View the Exhibit.Which statement regarding the dept and emp tables is true?A) When you delete a row from the emp table, you would receive a constraint violation error.B) When you delete a row from the dept table, you would receive a constraint vi…