available space

Problem: we have used a large number of distributed transactions and are studying database images to make one of our key databases highly available. During the test, we found that distributed transactions sometimes fail after trying to transfer the

The following tutorial will teach all Linux users how to safely erase available hard drive (HDD), solid state drive (SSD), and USB flash drive space, so that no one can restore the deleted files. Have you noticed that when you delete a file from the

Common RAID levels and featuresRaid0: it is called a strip. It has no fault tolerance capability and a high failure rate, but has good read/write performance. The available disk space is N * disk (single disk capacity) and requires at least two hard

Wsaeventselect model Programming Wsaeventselect model ProgrammingThis model is a simple asynchronous event model that is easy to use. Now let's talk about its specific usage and precautions.1. Model routine (server ):Here is an example of Wang

Reprint Address: http://blog.sina.com.cn/s/blog_61fbf8d10100zzoy.htmlThe view appears on the screen to go through measure (calculation) and layout.1. When do I call the onmeasure method?Called when the control's parent element is about to place the

The Onmeasure method is called when the parent element of the control is about to place its child controls. It asks a question, "How much place do you want to use?" ", and then pass in two parameters--widthmeasurespec and Heightmeasurespec.They

The content is reproduced from http://blog.sina.com.cn/s/blog_61fbf8d10100zzoy.htmlThe view appears on the screen to go through measure (calculation) and layout.1. When do I call the onmeasure method?Called when the control's parent element is about

Oracle RAC migration OCR (10g) Oracle RAC addition and deletion OCR reference: http://www.bkjia.com/database/201303/197136.html Oracle RAC backup and recovery OCR reference: http://www.bkjia.com/database/201303/196370.html If you want to change an

ORACLE introduced an automatic memory management feature from the 11g version. This feature requires more shared memory (devshm ). ORACLE introduced an Automatic Memory Management feature from the 11g version. This feature requires more shared

1. Linux is divided into Linux partitions because Linux cannot be installed on Windows partitions. Therefore, a partition must be separated from the hard disk for Linux. We recommend that you use a partition magician to perform lossless partitioning.

  Oracle logical database structure Overview Database space allocation units:Data Block, extent, and segment).   Specific concepts can be seen: http://hi.baidu.com/feixianxxx/blog/item/8d5429028d05dc091d95838a.html   I want to write a fewNotes:   1.

: Make ADB (in fact, it is/sbin/adbd, that is, the server of ADB) run on the Root permission. After connecting to the computer in debug mode, ADB shell can directly modify the files in the system folder (the prompt is "#" instead of "$" after

Reprinted please indicate the source: http://write.blog.csdn.net/postedit/40589651 The B-tree index in the Oracle database is like an inverted-long tree, which contains two types of data blocks: one is the index branch block, the other is that the

ReprintedBytes IndexYou can use indexes to quickly access specific information in database tables. An index is a structure that sorts the values of one or more columns in a database table (for example, the last name (lname) column of the employee

  During Linux installation, one step is to determine how hard disks are divided. If you are used to operating systems that place everything in the same partition, you may think this step seems a bit complicated. However, there are actually many

Partition magic error message and Solution The error message and possible solution of partition magic are listed behind by number. The information is also divided into groups according to the error category.1. Other errors (3-38)(1) #3 insufficient

About msocache folders In the system, there is always a large hidden folder such as msocache in the drive. Let's take a look at the generation and function of this folder. This is the local installation source (msocache) of offiece ). "Local

Each page on a page is 8 KB, and eight consecutive pages are called extents in a single zone. For example, the size of a DB in 2.18MB is about 2.18 MB (2,293,760 bytes) 2,293,760 b8kb280 pages 35 areas one page can only be viewed by one object all

1, the theme of thought: Elements can be resized to fit the available space, and when the available space becomes larger, the elastic box will stretch to fill the available space and will shrink automatically when the elastic box exceeds

References that are only interested in a specific format can be searched . DebOr . IPAOr . PxlTo quickly jump to the corresponding location. Reference Preface: Currently, there are three common installation packages on the iOS platform: