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research, in their hearts, would like to buy some cheaper items. Taking advantage of the customer is very important, if you can take advantage of the same time to get a sense of value of things, it is better. (Development Psychology academic education, academic education, vocational education, science popularization education, do more than college: libidos.cn) Here is a very interesting case: the United States clothing Shankri Brothers opened a clothing store, their business is booming. Every

entrepreneurship in the e-commerce sector, not limited to a platform for the development of a number of platforms can carry out their own business, the use of marketing ideas, the greatest extent to expand their marketing scope. When you have the technology and marketing ideas, the New year I suggest you can try to start their own business, adhere to their initial entrepreneurial philosophy, which will be your New Year's best profit direction. Four: By writing literary talent profit, 2012 sear

want to end, the database nightmare again appear in front of, because of add webserver too much, cause the database connection resources or not enough, and this time has already divided the storehouse, began to analyze the database pressure condition, You may find that the database reads and writes is very high, this time will often think of data read and write separation scheme, of course, this solution is not easy to implement, in addition, may find some data stored in the database is a bit w

1.RAID Description RAID is an abbreviation for the English Redundant Array of Inexpensive disks, abbreviated as a redundant array of inexpensive disks. Simply put, RAID is a combination of multiple separate hard disks (physical hard disks) in different ways to form a hard disk group (logical hard disk), providing higher storage performance than a single hard drive and providing data backup technology. Diffe

also be satisfactory. These parameters include echo loss, hierarchical distal crosstalk (elfext), propagation delay and delay distortion. Therefore, if the cable meets the requirements of Line 5 (1998) or Super 5, then it will support 1000BASE-T. If the installed cable meets only the 5 line standard (1995), the cabling system should be measured and certified in accordance with the newly added wiring parameters prior to connecting the 1000BASE-T device. (Computer science) 　　 Do you need 6 type

expansion when the working set grows.B. Even faster mechanical hard drives do not make hard disk read time much shorter, so there is no need to spend too much time on such disks. More memory and SSD effects are better.C. Normally we cannot add SSDs to an existing replica set if there is a mechanical hard disk in the replica set. If a machine that uses a solid-state drive becomes the primary member and takes over everything it can handle, the other members are limited by speed, unable to replica

ideal, but the cost is very high; the second is to improve overall computing performance and i/by replicating data to several inexpensive pcserver that use large hard drives o ability, effective, storage space is limited, low cost; third, by splitting the data horizontally, using multiple inexpensive pcserver and local disks to hold the data, each machine has only a part of all the data, solve the problem

,g in human readable units (default unit k)-S: Total directory size--max-depth=#: Specify maximum Depth # DD: Copy and Transform files Usage: dd if= of= bs= count= skip= seek= conv= if= of= bs= count= copy files and convert and format the contents of the original file if from file input (read ) (/dev/zore/All-zero character device) of output (write) to file BS specifies block size count specifies number of blocks written Skip skips how many blocks of the input file seek skips the number

database insert and query performance are very efficient, if the design is better, when using the MyISAM storage engine, the two can be unlocked, to achieve high concurrency performance. Therefore, MySQL is a great choice for systems that require a large number of inserts and query logging. such as processing user log, operation log, etc., are very suitable for the application scenario.3. Data Warehouse SystemWith the rapid growth of data warehouse data now, we need more and more storage space.

: In addition to the manufacturer's own application of third-party applications), This allows device manufacturers to provide a great deal of flexibility in how to create a unique and distinctive device while considering compatibility (Heaven Zhuhai Branch rudder note: Because handset manufacturers only need to be sure to meet the compatibility of Android, then you can do anything else on the device) Minimize costs and overhead associated with compatibility. Ensuring compatibility should is ea

bandwidth The cache mitigates instantaneous congestion and reduces the need for the original server. The cache reduces the distance delay because it is slower to load pages from farther away. Cache typeThe cache can be private to a single user, or it can be shared by multiple users. A private cache is known as 私有缓存 a shared cache 公有缓存 .Private cachePrivate caching is only for proprietary users, so it does not require much space and is inexpensi