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, mainly for basic and daily transaction processing, such as bank transactions.OLAP is the main application of the data warehouse system. It supports complex analysis operations, focuses on decision support, and provides intuitive and easy-to-understand query results. The following table lists the comparison between OLTP and OLAP: OLTP OLAP User Operator and lower-level management personnel Decision makers and senior management personnel Function Routi

and senior management personnel Function Routine operations Analysis and decision-making DB Design Application-oriented Subject-oriented Data Current, latest, and two-dimensional discrete Historical, aggregated, multi-dimensional, and unified Access Read/write dozens of records Read millions of records Work Unit Simple transactions Complex Query Number of users Thousands

SQL Server backup is a system project that takes a lot of time. As the database continues to grow during running, the corresponding backup will take more time. Generally, a database of GB is regarded as a very large database. Today, 100gb is very common, and many databases have reached the TB level. In this article, we will discuss how to quickly back up SQL Server in ten ways. 1. Back up tapes on hard disks for archivingBacking up to a hard disk is

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:10-15mb/seconds, the highest measured 100GB text can be indexed, a single index can contain 100 million recordssolr:10mb/seconds, billion data, 20G index, Sina currently also use Lucene search2. Search performanceSphinx: High performance Search, in 2-4GB text data, the average response time is less than 0.1 seconds, in 1.2G text, 1 million documents search, support up to 150~250 queries per second;SOLR: High performance Search, 8G index file, retriev

achieve a certain degree of scaling, but as the number of site visits gradually increased,Even with separate deployments with minimal granularity, a single server cannot meet the requirements of business size.Therefore, the server cluster must be used to deploy the same service on multiple servers to form a single cluster for the overall external service.Take the search server, for example, if a server can provide 1000 requests per second, that is, QPS (Query Per Second) is 1000.Then if the sit

a snapshot is deleted through the VI client. Typically, the status bar will quickly reach the 95% completed state, but will wait for a longer time in the 95% state until the merge is complete. VirtualCenter has a timeout of 15 minutes for all tasks, even though the background is still merging, but after 15 minutes, VirtualCenter reports that the operation timed out.One way to see if the task is complete is to browse the virtual machine's datastore through the VI client. If the corresponding del

First part Ubuntu virtual machine installationResource requirements:1, Vmware-workstation_full_12.1.1.6932.exe2, Ubuntu-14.04.3-desktop-amd64.iso3. InternetRecommended for desktop computers with CPU, 8G memory, and more than 100GB free partitions above i5First, install the virtual machine softwareSlightlySecond, new virtual machineFILE-New virtual machine-custom (Advanced)650) this.width=650; "src=" Https://s5.51cto.com/wyfs02/M00/8F/B2/wKiom1jqJ6Xi_W

10000GB.Most of the server disk space is not so large, the above command did not run out of space to consume the light. The author uses a general configuration of the notebook computer testing, write speed of about 60mb/s, a minute can write 3GB, if your server is 100GB, half an hour after the disk space will reach 100%, the user cannot create a file, the administrator cannot add the user, the system cannot write to the log ... Even after the system

disk according to capacity), click "New", the following figure- 3, given the size of the partition, MB, such as to be divided into 30GB area, write "30000", the following figure- It's home alert: If your hard drive is big enough, system partitions can be more than 100GB, or use 128GB or 256GB of the size of SSD as a system partition, you can use full capacity, do not need to divide other areas, the value does not change, but

button, and then turn on the power! Repeat the operation to switch to the RAID mode you want (note that the mode switching data will be cleared) 7,RAID1 (SAFE) mode, will be the first hard disk reconstruction, this is the normal image, will require a certain amount of time, generally 100GB about 1 hours (depending on the environment) 8, the first use or replacement of RAID mode, the power will be turned on the hard drive files will be removed, pl

MyISAM may take hours or even days to do these things, InnoDB only take a few minutes. Your habit of manipulating database tables may also be a significant factor in performance impact. For example, COUNT () can be very fast in the MyISAM table, and it can be painful under the InnoDB table. The primary key query is pretty fast under InnoDB, but it's important to be careful if our primary key is too long to cause performance problems. A large number of inserts statements would be faster under M

The new version of data compression mainly has the following improvements, this article will detail the display capacity and compression of the improvement of rice. Conversion of thick LUN to thin LUN when block compression is enabled Shows the capacity saved by compression Deeper-level file compression algorithms Solution: 1. New version of the introduction of the show because of compression and save capacity This feature shows the capacity saved by compressio

First determine the amount of disk space and traffic you need. How much disk space? A small or midsize web site requires at least 10MB to 100MB of disk space. If you only consider HTML pages, their average size is small. Maybe not even 1KB. But if you look at the size of the graphic you use on the page, you'll find that most pictures are much larger than the page itself. With pictures and other space-consuming elements, each page takes up 5KB to 50KB of server space. If yo

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-while also improving scalability, because the amount of work required to store each node is tied to the size of the cluster.In?nispan provides a simple mechanism to take advantage of large-capacity heap memory. If you maintain a copy of each node, if there are 100 nodes in the cluster, each node allocates 2GB of heap memory, then any instance in the grid can use up to 100GB of space, which can be memory, obviously very fast. The In?nispan is also com

of the general, because the red wavelength of 700 nm, and blue light only 400 nm, so the blue laser can actually be more accurate, able to read and write a 200nm point, and by contrast, red laser can only read and write 350nm points, So the same CD, more points, the record of the information will be more naturally! Blue-ray disk is a blue disc, is a DVD of the next generation of standards, the leader for Sony and Toshiba, Sony, Panasonic, Philips as the core, but also the Vanguard, Hitachi, Sa

360 Enterprise Cloud disk how real name authentication 360 Cloud plate Before the announcement to stop all cloud disk services, but the last 360 cloud disk back again, the 360 cloud disk will be the way the company cloud, but the user needs to carry out real-name certification. 360 Enterprise Cloud Disk How real name authentication? 360 officially released the Enterprise cloud disk, known as the current market specializing in small micro-enterprises, entrepreneurial team, personal st

bigger one was hundreds of MB, and now a game is a few gigabytes. If you are partitioning on the basis of the averaging principle, the storage of these mega files will be in trouble when you want to save two of HDTV movies. Therefore, for a large amount of hard disk, it is very necessary to separate a capacity of more than 100GB partition for the storage of mega files. 　　Principle VII: Give BT or electric mule a partition at the end of the disk Re

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