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Bkjia.com exclusive Article] Oracle 10 GB Data guard is a powerful tool to ensure high availability of enterprise data, data protection and disaster recovery, I have been using the grid console and SQL commands to work on the data guard/backup database for several years. My recent experience is LIMS, a laboratory information management system, half a year ago) using data guard to manually create a physical backup database, I need to maintain it every

[Practical code] PHP reads a 1 GB file size, Address: http://www.cnblogs.com/aiweixiao/p/7535351.html Please pay attention to my public account "programmer's cultural sentiments"Http://t.cn/RotyZtu [Background]: The file function reads all the content into the memory at a time. To prevent some poorly written programs from occupying too much memory, php causes insufficient system memory, so that the server is down, you need to find a good way. [Idea ]

GB system encoding how to convert Utf-8

002 /**003 * 004*2 GB or more ultra-large files are also valid005 * @ author MoXie006 */007 class Transfer {008 /**009 * buffer unit010 */011 const BUFF_SIZE = 5120; // 1024*5012 /**013 * file address014 * @ var 015 */016 private $ filePath;017 /**018 * file size019 * @ var 020 */021 private $ fileSize;022 /**023 * file type024 * @ var 025 */026 private $ mimeType;027 /**028 * Request region (range)029 * @ var 030 */031 private $ range;032 /**033 * wh

It is a tragedy. It cost 258 yuan (15 yuan postage ). I bought a RAZER's 3 GB anchor and there was no side light. Only the scroll wheel has light. When I bought it, I ran his bright green light. Is the side light provided by the wheel light? Obviously, the promotion effect cannot be achieved. Then I decided to return the goods. Of course, this is only one factor. HA has one, that is, comfort. I personally think it is not as good as the golden ring sna

increasing number of "..." to change the blinking cursor. New: Exp/imp is very easy to use, but the only confirmation is that the speed is too slow. If the data in a table has hundreds of millions of records, it is often a long time to stop importing and exporting the data in this table, however, the new tool expdp/impdp is provided from Oracle 10 Gb, which provides high-speed parallel and big data migration for Oracle data. Imp/exp can be called on

This piece of code:__try{}__except (GetErrorCode ()) {}　　You can capture a null pointer, but the code that surrounds it cannot have an object with its own destructor. The AUTO_PTR keyword inside the C + + 11 Standard, the exception that occurs when a pointer to this keyword can beTry{}catch (...) {}　　Capture, but the VC does not support the AUTO_PTR keyword.From official Microsoft documents, it is customary for Microsoft to use Goto to add a cleanup scalar after return at the end of the function

64-bit platform. NET Framework array limits cannot exceed 2GB size. This limitation is a very big problem for workers who need to use large matrices and vector computing.No matter how much RAM you have, once you work with large matrices and vectors, you often throw a System.OutOfMemoryException exception, as shown in:Reference Programclass program { privatestaticvoid Main (string[] args) { int150000000; var large=newdecimal[arrysize]; Console.

The code is as follows Copy Code function Sizecount ($filesize) {if ($filesize >= 1073741824) {$filesize = Round ($filesize/1073741824 * 100)/100. ' GB ';} elseif ($filesize >= 1048576) {$filesize = Round ($filesize/1048576 * 100)/100. ' MB ';} elseif ($filesize >= 1024) {$filesize = Round ($filesize/1024 * 100)/100. ' KB ';} else {$filesize = $filesize. ' bytes ';}return $filesize;}Application method$path = './111cn.net/a.gif ';Echo S

In the "Evaluation of IP address-> geographical transformation", the article mentions that using the IP2ADDR function to read IP database files directly is the most efficient, compared with the MySQL database storage of IP data, SQL query is the least efficient. However, the IP database file QQWry.dat is GB2312 encoded. Now I need UTF-8 coded geographic results. If you use the MySQL method, you can convert the data to the UTF-8 code when it is stored in the database. But QQWry.dat file can not b

Units from small to large sort: Byte, KB, MB, GB, TB, PB, EB, ZB, YB, DB, NB rate 1024 1Byte = 8 Bit 1KB = 1,024 Bytes 1MB = 1,024 KB = 1,048,576 Bytes 1GB = 1,024 MB = 1,048,576 KB = 1,073,741,824 Bytes 1tb=2 's 40-Time Square byte=1099511627776 Byte 1pb=2 's 50-time Square Byte=1125899906842624byte 1eb=2 60-Time Square byte= 1152921504606846976 Byte 1zb=2 70-Time Square byte= 1180591620717411303424 Byte 1yb=2 80-Time Square byte= 1208925819614629174

Json_encode is a problem in processing Chinese characters and cannot process GB encoding. all GB encoding will be replaced with null characters. The following is a good solution. for details, refer to JSON The json function added by php5.2 is very popular, but it has been tested and found that, Json_encode is problematic in processing Chinese characters, 1. cannot process the

I saw two articles, "30 types of U disk capacity in Beijing" shrunk "on the black list of Kingston" and "Consumer Association", saying that U disk shrinkage is not common sense: wrong Statistical Methods: The measurement unit GB is not accurate in both articles. Here are some of my views. First, let's quote a paragraph in Wikipedia. It is an information measurement unit. It is a type of measurement unit, nowadays, it is usually used to mark the sto

In Oracle 10 Gb system management, there is an automatic SGA memory management ASMM ). This function is described as follows: To use automatic management, you need to set the parameters SGA_TARGET, STATISTICS_LEVEL = TYPICAL or ALL. Because the statistics set is not supported, the database does not have the necessary historical information to determine the size ). In Oracle9i and earlier versions, you can only use manual SGA memory management. The SGA

Today, we can see that a high-profile mysql database is about 6 GB, and the import is a problem, and the upload is quite troublesome. here we will share with you to make it easier for you. Today, we can see that a high-profile mysql database is about 6 GB, and the import is a problem, and the upload is quite troublesome. here we will share with you to make it easier for you. Tool selection I. Sqlyog is

php5.2 's new JSON functionality is very popular, but it has been tested and found Json_encode's handling of Chinese is problematic, 1. GB encoding cannot be processed, all GB encodings are replaced with null characters. 2.UTF8 encoded in Chinese is encoded as Unicode encoding, which is equivalent to the result of JavaScript's escape function processing. Copy CodeThe code is as follows: /* In order to use

I don't know when to start, there is a saying on the network that the partition for installing Vista cannot be less than 15 GB. As a result, this statement has been spread across 10 and 10, and gradually becomes the "only standard ". However, I have always had doubts about "true", so I found a time to practice it myself. I did a test on IBM t42. The general hardware environment and system environment are as follows: IBM t42 Model

The folder size in the USB flash drive is dozens of GB. The folder size is garbled and cannot be deleted. Today, I inserted a USB flash drive on my classmate's computer and copied a video file. Later, I installed the system and used the USB flash drive to copy the driver file, but I couldn't install the copied driver file, A black window always disappears. I started to suspect that the driver file was damaged. Then I decompressed the driver file on m

I have a 60 GB Kingston solid state drive, tested the difference between 4 K partition alignment and found that the performance is very different, not to mention, first, the software optimization and testing software below, download URL:There is no running score with 4 K partition alignment firstNote that 31 k-BAD means that 4 k does not mean alignment.650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131227/19141355V-0.png "border =

json_encode to Chinese processing is a problem, not processing GB encoding, all GB code will be replaced with empty characters, there is a good solution, you can refer to the following php5.2 's new JSON feature is very popular, but tests have found that,nbsp; Json_encode has a problem with Chinese processing,nbsp; 1. GB encoding cannot be processed, and all