Maqaalkani waxa uu iftiiminayaa kaydinta Windows Azure . Marka ay timaado kaydinta weyn, waxaa jira waxyaabo gaar ah oo u baahan in la fahmo. Windows Azure waxay bixisaa adeegyo kaydin oo kala duwan oo taageeraya gabi ahaanba dhammaan noocyada baahiyaha kaydinta, laga bilaabo qaabaysan ilaa xog aan habaysanayn, kaydadka NoSQL^(NoSQL) , iyo safafka.

Sidee xogta loogu kaydiyaa Cloud

Ilaa hadda Windows Azure waxay leedahay afar nooc oo kaydin ah waxayna kala yihiin:

1. Kaydinta blob
2. Kaydinta safka
3. Kaydinta miiska
4. Windows Azure Drive

Aan isku dayno inaan helno sharraxaad guud mid kasta oo iyaga ka mid ah!

Kaydinta Blob

Blob waa erey la soo gaabiyay oo loo yaqaan shay Binary Large . Asal ahaan Blob^{(Basically Blob)} waa isku xigxiga bytes - kaliya waxa codsigu u baahan yahay. Blob wuxuu hayn karaa maqal, muuqaal, fariimo iimayl, faylal kaydsan, faylal sib ah ama dukumeenti habaynta kelmad si guud.

Si loo isticmaalo blobs, horumariye ayaa marka hore ku abuura hal ama ka badan weel koontada kaydinta qaarkood. Mid kasta oo ka mid ah weelashaas ayaa markaa qaban kara hal ama dhowr boob. Waxaa jira laba nooc oo kaydinta blob ah oo la heli karo, mid kastaa wuxuu bixiyaa shaqeyn gaar ah:

1. Block Blob
2. Bogga Blob

Blob^(Blobs) waxaa lagu kaydiyaa oo lagu kaydiyaa weelasha Blob^{(Blob Containers)} . Boob kasta wuxuu noqon karaa ilaa 50GB. Bloob waxay ku leedahay weelka dhexdiisa magac xareed gaar ah. Blobs waxay yeelan karaan metadata la xidhiidha iyaga, kuwaas oo ahlammaane waxayna yihiin ilaa 8KB cabbirkiiba. Xogta badan ee blob waxaa loo dejin karaa si gooni ah marka loo eego barta xogta blob.

Kaydinta safka

Hadafka ugu weyn ee safafka waa in la oggolaado xiriirka ka dhexeeya qaybaha kala duwan ee codsiga Windows Azure . Erayada fudud Safafka^(Queues) ayaa kala saaraya tusaalooyinka Doorka Shabakadda iyo Tusaalooyinka ^{(Web Role)}Doorka Shaqaalaha^{(Worker Role Instances)} – Safka waxa ka kooban fariimo badan – Magaca safka waxa lagu qiyaasaa koontada.

• Ma jiro wax xaddidan tirada fariimaha lagu kaydiyo safka.
• Fariinta waxa la kaydiyaa ugu badnaan hal usbuuc. Nidaamku wuxuu qashinka ururin doonaa fariimaha ka badan hal toddobaad.
  Safafka ayaa yeelan kara xog badan oo iyaga la xidhiidha. Metadata waxay ku jirtaa qaablammaane, waxayna cabbirkooda yihiin ilaa 8KB safkiiba.
• Safka caadiga ah ayaa laga yaabaa inuu bixiyo semantics 'ka hore marka hore'; dhanka kale safafka Windows Azure ma dammaanad qaadayaan in hal fariin la dhiibi karo dhowr jeer.

Ka habaynta fariimaha safka waa hab laba marxaladood ah, kaas oo ku lug leh helitaanka fariinta, ka dibna tirtirto fariinta marka la habeeyo. Habkani waxa uu dammaanad qaadayaa gudbinta fariinta guusha leh.

Kaydinta Miiska

Kaydinta miisku waa ururin ururo u eg saf, kuwaas oo mid walba ka koobnaan karo ilaa 255 guri; si kastaba ha ahaatee, si ka duwan miisaska ku jira kaydka xogta, ma jiro schema oo xoojinaysa qaybo gaar ah oo qiyam ah dhammaan safafka miiska ku jira. Kaydinta Miiska waxa isticmaala codsiyada u baahan kaydinta xaddi badan oo kaydin xog ah oo u baahan qaab dhismeed dheeri ah.

Iyadoo miiska uu kaydiyo xogta habaysan, ma bixiso si kasta oo lagu matalo xiriirka ka dhexeeya xogta, mararka qaarkood loo yaqaan kaydka NoSQL . Jadwallada ku yaal Windows Azure waxay u furaan qol si loo cabbiro. Waxay macno samaynaysaa horumariyayaashu inay naqshadeeyaan codsiyada la cabbiri karo. Kaliya^(Just) naqshadeyso miis oo ku dar qaybo ka mid ah ka dib Windows Azure ayaa daryeesha inta soo hartay.

Hadafka halkan waa in la caawiyo horumarinta si ay diiradda u saaraan horumarinta codsigooda halkii ay ka welweli lahaayeen maareynta xogta ballaaran.

Understanding Blob, Queue, Table storage in Windows Azure

This article throws light on storage in Windows Azure. When it cоmes to the large storage, therе are certain things that need to bе understood. Windows Azure offers a widе range of storage services supporting virtually all types of storagе needs, from structurеd to unstructured data, NoSQL databases, and queues.

How is data stored in the Cloud

As far as Windows Azure goes it has four forms of storage and they are:

1. Blob storage
2. Queue storage
3. Table storage
4. Windows Azure drive

Let us try to get a generic explanation for each of them!

Blob Storage

Blob is an acronym for Binary Large object. Basically Blob is a sequence of bytes – just what an application needs. Blob can hold audio, video, email messages, archived files, zip files or a word processing document in a very general way.

To use blobs, a developer first creates one or more containers in some storage account. Each of these containers can then hold one or more blobs. There are two types of blob storage available, each provides specific functionality:

1. Block Blob
2. Page Blob

Blobs are stored in and scoped by Blob Containers. Each blob can be up to 50GB. A blob has a unique string name within the container. Blobs can have metadata associated with them, which are <name, value> pairs and they are up to 8KB in size per blob. The blob metadata can be set separately from the blob data bits.

Queue storage

The main goal of queues is to allow communication between different parts of a Windows Azure application. In simple words Queues separate Web Role instances and Worker Role Instances – A queue contains many messages – The queue name is scoped by the account.

• There is no limit on the number of messages stored in a queue.
• A message is stored for at most a week. The system will garbage collect the messages that are more than a week old.
  Queues can have metadata associated with them. Metadata is in the form of <name, value> pairs, and they are up to 8KB in size per queue.
• A conventional queue may offer semantics of ‘first in first out’; on the other hand queues in Windows Azure don’t guarantee that a single message can be delivered multiple times.

Processing messages from a queue is a two-stage process, which involves getting the message, and then delete the message after it has been processed. This pattern guarantees successful message delivery.

Table Storage

Table storage is a collection of row-like entities, each of which can contain up to 255 properties; however, unlike tables in a database, there is no schema that enforces a certain set of values on all the rows within a table. Table Storage is used by applications requiring storing large amounts of data storage that need additional structure.

While table stores structured data, it does not provide any way to represent relationships between the data, sometimes called a NoSQL database. Tables in Windows Azure open up room for scalability. It makes sense for developers to design scalable applications. Just design a table and add some entities then Windows Azure takes care of the rest.

The goal here is to help developers to focus on their application development rather than worrying about large data management.

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