backup deduplication

ZBackup: A Multi-Function deduplication Backup Tool Zbackup is a global deduplication Data Backup Tool Based on rsync. After passing in a large tar file, it will store the duplicate part of the file only once, compress the results, and determine whether to encrypt the file based on the parameters. After passing in anot

be considered when planning your deployment. Servers usually have peak activity periods, and there is a time when resource utilization is low. Data deduplication can do most of the work when resources are idle. Servers that are always running at maximum capacity are not a good candidate for data deduplication, even if the deduplication process can use a backgrou

Q: What are the advantages and disadvantages of the software-based deduplication and hardware-based deduplication products? A: software-based deduplication aims to eliminate source redundancy, while hardware-based deduplication emphasizes data reduction of the storage system. Although bandwidth compensation cannot

old fix-character strings in the dictionary. The LZW algorithm added with these improvement measures has been adopted in GIF image formats and Unix compression programs. LZW algorithm has obtained a patent. The patent owner is an American large-scale computer company, Unisys. Apart from commercial software production companies, LZW algorithm can be used for free. Delete duplicate data[1] [7] [8]In actual storage practices such as backup and archive,

Reading: deduplicationThe emergence of technology has a certain source, so we should start from the beginning. Although the current price of storage media has plummeted, the Unit storage cost is already very low. But it still cannot keep up with the growth rate of enterprise data files. As a result, energy consumption, data backup management, and so on have become difficult issues. In addition, some duplicate files also increase. To this end, enterpri

information can be completely recovered from the lossless compressed data from the original data information. 3 Data de-weightData de-weight ( Data deduplication) is the process of discovering and eliminating duplicate content in a dataset or data stream to improve the storage and / or transfer efficiency of data, also known as deduplication ( Duplicate data Elimination), simply weigh or re-delete. As a ke

Python list deduplication method you should know, python list deduplication Method Preface List deduplication is a common problem when writing Python scripts, because no matter where the source data comes from, when we convert it into a list, the expected results may not be our final results, the most common thing is that the Meta in the list is repeated. At this

Disable Windows deduplication and windows deduplication Deduplication can reduce disk usage, but improper use may also increase IO. In addition, this function also blocks the hard disk. Therefore, when the hard disk usage is high, it is also difficult to fragment, So you sometimes need to disable the deduplication fun

1. What is deduplication?Simply put, when data is transmitted or stored over the network, multiple identical copies are not transmitted or stored.Data to reduce the occupation of network bandwidth and storage space. In fact, the previous SIS (single-instance storage) is a dedu technology, but its de-duplication unit is file. Currently popularThe deduplication technology is based on data blocks. The de-dupli

This article mainly introduces the sample code for de-duplication and de-duplication of JS arrays. If you need it, you can refer to it for help. Method 1: deduplication The Code is as follows: ScriptArray. prototype. distinct = function (){Var a = [], B = [];For (var prop in this ){Var d = this [prop];If (d = a [prop]) continue; // prevents loops to prototypeIf (B [d]! = 1 ){A. push (d );B [d] = 1;}}Return;}Var x = ['A', 'B', 'C', 'D', 'B', 'A', 'A',

Array deduplication Array, Array deduplication Array var aee3=[31,42,13,19,5,11,8,13,40,39,1,8,44,15,3]; Array.prototype.unqu2=function(){ this.sort(); var arr2=[this[0]]; for (var j = 1; j There are a lot of de-duplication methods on the Internet, and the most stupid is the second method, and the best efficiency is the third one.

Simple example of php array deduplication (one-dimensional and two-dimensional array deduplication) $ Aa = array ("apple", "banana", "pear", "apple", "wail", "watermalon "); $ Bb = array_unique ($ aa ); Print_r ($ bb ); ?> Output result: Array ([0] => apple [1] => banana [2] => pear [4] => wail [5] => watermalon ).2. duplicate items of two-dimensional PHP

PHP two-dimensional array deduplication algorithm, PHP two-dimensional array deduplication Algorithm Requirement The following two-dimensional array is available: Array (8) {[0] => array (2) {["name"] => string (4) "name" ["value"] => string (6) "qingye"} [1] => array (2) {["name"] => string (5) "phone" ["value"] => string (11) "13812341234"} [2] => array (2) {["name"] => string (12) "fileds_507 []" ["value

Deduplication has been widely used in data backup. We found that for backup applications, we can delete and compress data by repeat data about 20 times, thus saving a lot of storage space. How can I retrieve duplicate data blocks? If byte-level comparison is adopted, the performance of the entire system is certainly unacceptable. To solve this problem, you can us

What should you do if the recovery data grows too large and traditional disaster recovery methods cannot achieve the goal? Some new technologies, such as deduplication, storage Tiering, and data management policies, can help you reduce the high cost of disaster recovery, at the same time, it can also achieve the expected recovery time objective (rediscovery time objective or RTO ). In the previous article, we gave an example of a company ignoring the

definition in this article: eliminates redundant data blocks by creating smaller-size pointers to reference an already stored data block that has identical content.It is mentioned that the data blocks of Virtual Machine images of different versions of the same Linux distribution (Linux distribution) are highly repetitive. 2. Introduce de-duplication to virtual machine image storage. The following requirements must be taken into account (S1 ): Impact on the Performance of virtual machi

Hyper-V Server data deduplication technologySwaiiow heard that the new technology in Windows Server 2012 is called Deduplication, which is said to save disk space significantly, and let's look at what deduplication is:Data deduplication refers to finding and deleting duplicates in the data without affecting their fidel

Label:Let's say we have a MongoDB collection, take this simple set as an example, we need to include how many different mobile phone numbers in the collection, the first thought is to use the DISTINCT keyword, db.tokencaller.distinct (' Caller '). Length If you want to see specific and different phone numbers, then you can omit the length property, since db.tokencaller.distinct (' Caller ') returns an array of all the mobile phone numbers. but is this a way of satisfying all things? Not

In Windows 2012, you can enable data deduplication for non-system volumes. Deduplication optimizes volume storage by locating redundant data in the volume, and then ensuring that the data is saved in only one copy of the volume. This is accomplished by storing the data in a single location and providing this location reference for other redundant copies of the data. Since data is divided into 32-128kb chunk

INSERT into table (ID, name, age) VALUES (1, "A", +) on duplicate key update name=values (name), Age=values (age)/* Insert Data: If there are duplicates, select Update; */Insert ignore into ' testtable ' (' Mpass ', ' Pass ') select Mpass,pass from Rr_pass_0 limit 0,1000000replace into ' testtable ' ( ' Mpass ', ' Pass ') select Mpass,pass from Rr_pass_0 limit 0,10Set PRIMARY key: Discard if duplicate data is selected;SELECT *, COUNT (distinct name) from the table group by nameQuerying for dupli