what is server virtualization for dummies

), Managed in a constrained form. But at the same time, it automatically creates a unique nonclustered index, with the performance and some functionality of the index. In fact, unique key constraints are constrained by unique indexes. A unique index is an index that uniquely checks a field and can set various parameters for flexibility. So when we create the uniqueness of a column, which is better to use?

RAM2), when RAM is 2-16GB, swap size is recommended equal to RAM size3), Ram greater than 16GB, swap size recommended 16GB4, large memory environment swap size configuration recommendationsDue to the rapid decline in memory prices, the current production system server memory 256GB, 512GB is no surprise, the author rec

What is an application pool? This is a completely new concept of Microsoft: An application pool is a configuration that links one or more applications to one or more worker process collections. Because applications in an application pool are separated from other applications by the worker process boundaries, applicatio

　　 What is the mirror of Ali Cloud server Mirroring is the template for a cloud server ECS instance running environment, typically including the operating system and pre-installed software. You can use mirroring to create a new ECS instance and replace the system disk for

actual experience can be. It has an open API interface, can be used as a Third-party function module to access other systems, such as WSP is connected to the Idcsystem financial system, you can in the Idcsystem panel for the function of virtual host and financial management. The Websitepanel is suitable for the following people to use: Developers: managing their own websites or subordinate customers ' we

The mention of installation Linux,ubuntu is the most popular. In order to meet everyone's needs, there have been many versions or styles of Ubuntu, two of which are desktop and server editions. As long as the release version number is consistent, the two are the same from the core, the only difference is their intended

Indexes do not always take effect, such as the following, which will invalidate the index : If there is an or in the condition, it will not be used even if there is a conditional index ( which is why the use of or is minimized ) 　　Note: If you want to use or, and you want the index to take effect, you can only

The blade is a Low-cost server platform for HAHD (high availability height density, highly available high-density) designed specifically for special application industries and high-density computer environments, where each "blade" is actually a system motherboard, Similar to a separate server. In this mode, each mothe

At present, the server CPU still according to the CPU instruction system to differentiate, usually divides into the CISC type CPU and the RISC type CPU two kinds, later appeared a 64 bit vlim (Very long instruction Word Ultra long instruction set schema) instruction system's CPU. First, CISC type CPU CISC is an abbreviation for the English "Complex instruction set Computer", which means "complex inst

1. Cluster (Cluster): A group of independent computer systems that form a loosely coupled multiprocessor system that communicates between processes through the network. Applications can communicate over a network of shared memory to implement distributed computers. 2. Load balancing (Load Balance): Start with the cluster, the cluster is a group of connected computers, from the outside to see it is a system

1, the computer printer error, the printer appears RPC server is not how to do. 2, open the control surface version, find services. 3, the list of services found print spooler, found this did not start (not running). 4, right key point to start (automatic) on it, generally this can be printed (or enter the property can be more settings). 5, th

Brief introduction SQL Server Query Analyzer is cost-based. Typically, the Query Analyzer determines how to choose an efficient query route based on predicates, such as which index to choose. And every time the Query Analyzer looking for the path, and not every time to statistics the number of rows included in the index, the range of values, but based on certain conditions to create and update the informat