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C9050-548 - IBM IMS DBA - Dump Information

Vendor : IBM
Exam Code : C9050-548
Exam Name : IBM IMS DBA
Questions and Answers : 85 Q & A
Updated On : March 19, 2018
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BMC Mainframe solutions boost security with IBM z14 | real questions with brain dumps

Dec 4, 2017

BMC is working to deliver mainframe clients with application options that make the most the newest technologies, together with the pervasive encryption supplied with the IBM z14 mainframe.

probably the most first organizations worldwide to installation the IBM z14, BMC provides mainframe database backup and healing solutions for protecting purchasers, and ensuring critical company data is secure and recoverable on the z14.

by way of enforcing the z14, BMC says it's well located to leverage the z14 mainframe's capabilities into its options, making certain BMC purchasers can be capable of swiftly profit access to utility, together with backup and recovery options, that takes competencies of the IBM z14 mainframe's pervasive encryption capabilities.

The IBM z14 additionally offers advanced security this is important with latest protection and compliance initiatives, together with the european's conventional information insurance plan regulation (GDPR.) The z14 mainframe makes it viable to encrypt information associated with any application, cloud service, or database. organisations entirely incorporating these capabilities into their digital transformation and security and compliance initiatives, together with GDPR, will benefit from software that has been designed, developed, and totally verified to take skills of the IBM z14 mainframe's newest points.

A key part of the GDPR law, which goes into impact in may additionally 2018, is making sure that organizations' mainframe statistics is comfortable and recoverable in a well timed method.

With BMC's facts administration and recovery options for Db2 and IMS, BMC seeks to present customers speedy recuperation from any statistics loss or corruption, proof that facts is recoverable and that restoration is well timed, repeatable processes to be certain endured compliance, and integrity validation for unstructured records in Db2.

"IBM Z helps valued clientele handle today's most complicated challenges with step forward expertise and ability," said Ross Mauri, generic supervisor, IBM Z. "you would are expecting it to have big transaction scale, and it does. Even greater, its skill to pervasively encrypt utility facts at scale is 2d to none. IBM z14 and the options BMC offers can help our mutual purchasers accelerate their digital enterprise experience."

To gain knowledge of greater about BMC's mainframe information management solutions, together with those who assist mainframe businesses obtain and display compliance with GDPR, talk over with

To read about BMC's recently announced 2017 BMC Mainframe analysis file, talk over with

What to predict with pervasive encryption on IBM mainframes | real questions with brain dumps

there are many factors to embrace encryption. Equifax's safety breach is one instance of what happens when hackers...

breach firewalls and entry unencrypted facts. economic enterprises wish to use blockchain know-how to list and manage financial transactions, and charge Card business compliance becomes stricter each year. To place the mainframe in this ambiance, IBM brought pervasive encryption to its z14.

The fundamentals of pervasive encryption

Pervasive encryption, which, in some ways, is an extension of existing mainframe security capabilities, requires IBM's newest processor, the z14, and edition 2.three of z/OS. Pervasive encryption acts as an extension to present mainframe amenities, except that there is embedded cryptographic performance. This makes the equipment seamless, ubiquitous and easy to control.

the new z14 processors have a central Processor support for Cryptographic features (CPACF) on each core, which makes cryptographic functionality fairly short and low cost. users may still buy a Crypto Express6S Peripheral part Interconnect categorical hardware protection module (HSM). The HSM, in contrast to the CPACF, is outboard from the processor, which implies a specific amount of latency and overhead. each amenities work together to help pervasive encryption.

IBM applied part of pervasive encryption, referred to as records set encryption, in records entry strategies and device-managed storage (SMS) facilities. This enables data set encryption at the particular person information set stage through SMS coverage.

facts set encryption requires prolonged layout data and encompasses most simple sequential information and all kinds of digital Storage access method (VSAM) facts units. It does depart a pair curious holes by way of except partitioned information sets and tapes. assistance management equipment v14 makes it possible for statistics set encryption for a subset of information sets, whereas IMS v15 can have full help.

clients can encrypt the Coupling Facility cache and list buildings as smartly via CF useful resource supervisor coverage. IBM's z/OS encrypts the data for insurance policy each in flight and at rest in the CF.

The z/OS's device Authorization Facility controls access to encryption keys and capabilities to very granular ranges. This could lead on to situations where a person can be authorized to study a knowledge set but unable to decrypt it. here is the perfect setup for storage and database directors.

Encrypted information would not compress smartly, in response to IBM. customers with z records Encryption playing cards should compress information earlier than encrypting it. The equipment will try this instantly if a store implements compression and encryption via SMS policy.

charge, efficiency concerns

Cryptography is computationally excessive, and shoppers may still be legitimately worried about the delivered cost.

IBM better the z14's CPACF performance, surpassing the z13 version. A CPACF is additionally paired with each core, so that you can invoke cryptographic functions at processor velocity via a really good set of laptop instructions.

To raise performance devoid of compromising security, IBM presents a relaxed key/covered key scheme. comfy keys live in tamper-proof hardware that clients can most effective entry through the HSM function. When anything wants a at ease key, the equipment retrieves it in the course of the HSM, wraps it in a different inner most key generated for that OS illustration and outlets the covered key in the hardware gadget enviornment, the place most effective the CPACF and microcode can entry it.

This implementation streamlines and hides crypto-operations from purposes. When a application opens an encrypted file, the access formula asks the gadget to retrieve the covered key. because the application asks for facts, the access system retrieves and decrypts the actual record and items a transparent buffer to the caller. because the software writes assistance, the access system collects statistics right into a buffer and encrypts the complete actual record because it goes to disk. In both case, working with records in blocks minimizes the number of cryptographic operations and CPU cycles.

IBM claims a reduce than 5% overhead in encryption but acknowledges that all and sundry's records is different. therefore, it gives a edition of z Batch community Analyzer to estimate the cost based on specific consumer information and z/OS Encryption Readiness know-how that tracks security requirements with verbal exchange companions.

Is pervasive encryption correct for you?

organisations with regulatory and confidentiality necessities should still take capabilities of data set encryption. The quite handy implementation and transparency of data set encryption presents the least direction of resistance to issues reminiscent of PCI compliance. also, a neatly-deployed information set encryption policy will protect in any other case not noted sensitive facts.

CF encryption can be overkill except for CF buildings for log streams that comprise delicate records, equivalent to a VSAM forward recuperation log flow for a banking VSAM file.

What Goes around Comes round: a brief heritage of Databases | real questions with brain dumps

What Goes around Comes around is a desirable paper about the (cyclical) heritage of information modeling. It turned into written with the aid of two database consultants: Joseph Hellerstein, a computer science professor at UC Berkeley, and Michael Stonebraker, founder of Ingres and Postgres and winner of the 2014 Turing award.

this text came to my consideration as the first paper mentioned in Readings in Database programs (or the "pink e-book," additionally partly through Michael Stonebraker), linked to me with the aid of a co-worker at Grakn. The ebook has proven to be a superb reference element for tried-and-tested techniques and architectures in database administration methods.

Written in 2005, it presents a surprisingly vital view on the current state of databases and data fashions. The traits it outlines are nonetheless keeping genuine, with models such as JSON and property graphs sitting firmly within the "semi-structured" period it describes.

The paper takes us via nine eras of records fashions:

  • Hierarchical (IMS): Late 1960s and Nineteen Seventies
  • community (CODASYL): Seventies
  • Relational: Nineteen Seventies and early Eighties
  • Entity-Relationship: Seventies
  • prolonged relational: Eighties
  • Semantic: Late 1970s and Nineteen Eighties
  • Object-oriented: Late Eighties and early Nineties
  • Object-relational: Late 1980s and early 1990s
  • Semi-structured (XML): Late Nineteen Nineties to the latest
  • In reading the paper, it be clear that there are definite classes to be learned from every era. certain issues obviously worked and other things obviously did not, and it indicates that innovations don't all the time get adopted in a simple way. furthermore, it's also evident that the equal sorts of issues seem and re-appear and the identical instructions maintain being relearned.

    to be able to illustrate these historical patterns in database idea and innovation, the authors use the classic example of suppliers and ingredients from Codd:

    corporation (sno, sname, scity, sstate) part (pno, pname, psize, pcolor) supply (sno, pno , qty, fee )

    this is presented as a relational schema. each line is a relation (or table), with the attributes in brackets. So, during this case, we've a collection of suppliers and a collection of materials. there is also a "supply" relation, indicating that a specific part is a supplied by way of a specific enterprise, with the given amount and cost.

    IMS era

    IMS (information administration equipment) changed into released in 1968. It structured records into list forms with fields, akin to the relational desk above. every checklist category (apart from the basis) has one mother or father listing type. similarly, each illustration of a checklist class needs a dad or mum it is an instance of the mother or father checklist classification. here is referred to as a hierarchical model because it varieties a hierarchy of listing kinds and situations.

    This mannequin is so confined that we can not even symbolize our instance adequately!

    Our alternate options are either to make half a child of supplier (left), or agency a toddler of half (correct). notice that within the former case, we grow to be duplicating half assistance if the equal part is sold via distinctive suppliers. in the latter case, we are able to replica corporation advice if the equal agency sells diverse components.

    This redundancy is a controversy in terms of storage effectivity as well as consistency. If the identical information is kept in two places, particular care must be made to make certain that both pieces of statistics don't go out of sync.

    the previous case also can't model a part that isn't sold by way of any organisation. in a similar way, the latter case cannot mannequin a enterprise who sells no parts.

    IMS was queried list-at-a-time by means of navigating the hierarchy. as an instance, to find all the crimson parts presented by way of supplier sixteen:

    get interesting organization (sno = sixteen) until failure: get subsequent within dad or mum (pcolor = purple)

    This reads a whole lot like an crucial programming language; we've step-by way of-step guidelines, state, and manage circulation. We very nearly should describe explicitly the algorithm to execute in order to finished a question. understanding how to run a query rapidly can also be a challenge. Even some thing this standard can also have a faster execution formula in definite circumstances (as an instance, if we've an index to look up red parts, however now not one for corporation numbers).

    moreover, IMS supported a few tips on how to shop information in keeping with the key(wonderful, ordered identifier for a record): you could save them sequentially, or listed with a B-tree, or hashed. This intended you might choose whatever thing would deliver the ultimate performance for your use case.

    besides the fact that children, the storage formula chosen would basically disable certain operations. for example, you could not insert a single listing once they have been saved sequentially. If using the hash components, then you definately could not use "get next," equivalent to within the question above. This demonstrates an absence of actual facts independence — we can not trade the actual statistics degree devoid of also changing the logical data degree. This becomes very important with databases which are maintained for a long time: enterprise requirements alternate, the records saved changes and increases. At some element, a unique physical records illustration may well be fundamental to improve performance. This changed into a motivator behind the relational model, which we will focus on later.

    IMS did present a little help for logical facts independence — that means we can extend the logical facts degree without impacting purposes developed on it. It allowed exposing most effective a subset of checklist varieties (pretty much a sub-tree of the hierarchy). This meant new listing kinds could be brought with out disrupting the view of the facts.

    IMS has seen a few extensions to its model such that it could actually (type of) tackle more complicated models akin to our instance. it is really still in use and maintained nowadays (the newest liberate become in 2015). In generic, clients seem like legacy systems where the expenses outweigh the advantages of switching to whatever thing greater modern.

    So these are the lessons from IMS:

  • physical and logical information independence are highly alluring.
  • Tree-structured data models are very restrictive.
  • it's a problem to provide subtle logical reorganizations of tree-structured facts.
  • A listing-at-a-time user interface forces the programmer to do manual query optimisation, and here's frequently hard.
  • CODASYL era

    Independently of IMS, CODASYL (Committee on information techniques Languages) created a few studies between 1969 and 1973 describing the network mannequin, a extra bendy model that permits a record class to have distinct parents.

    In our illustration, we introduce two arrows: materials and Supplied_by. These are referred to as set types. The arrow goes from the owner record class to the newborn list class. An instance of the proprietor class has a collection of circumstances of the newborn type (here is a little distinct from a mathematical set since the set should have an proprietor). So in our illustration above, a organization might also have any number of supply children by means of the set components.

    This further flexibility has allowed us to get rid of all redundancy. additionally, it's perfectly feasible to have a company without any parts and vice-versa - they'd simply haven't any give little ones.

    Like IMS, CODASYL makes use of a record-at-a-time question language:

    discover company (SNO = sixteen) until no-more: discover subsequent supply checklist in materials discover owner part checklist in Supplied_by get present record verify latest checklist (colour = crimson)

    in this case, we have a few "cursors" pointing to records — a cursor for the organisation, a cursor for the supply, a cursor for the part and a cursor for the existing list. When writing a CODASYL question, the programmer has to accept as true with the place of all these diverse cursors in their head. The paper explains it premier: "one way to feel of a CODASYL programmer is that he should application looking at a wall map of the CODASYL community that's adorned with a considerable number of colored pins." As that you may imagine, this is rarely terribly easy or intuitive!

    An further situation with the network mannequin is loading the information. constructing the sets of data may also be time-consuming and infrequently the order things are loaded can make a huge difference when it comes to efficiency. figuring out the order things should be loaded is non-trivial.

    There are nonetheless some databases floating around in response to CODASYL, such as IDMS; although, they aren't common.

    The training from CODASYL are:

  • Networks are extra flexible than hierarchies but extra advanced.
  • Loading and improving networks is more complicated than hierarchies.
  • Relational era

    The relational model changed into proposed via Ted Codd in 1970, stimulated partly through producing a stronger model than IMS for records independence. statistics is structured as family members — sets of tuples. The query language is determined-at-a-time, performed on complete family members the use of operators reminiscent of choose σ and be part of ⋈ :

    σ[sno=16 ∧ pcolor=red](provide ⋈ employer ⋈ half)

    This combination of an easy mannequin and a high-stage language allows for an awful lot enhanced logical and physical statistics independence: the use of the relational operators, we are able to describe logical family members when it comes to actual ones (the ones that are really saved to disc). functions don't should know the change.

    In distinction to the outdated fashions mentioned, the relational mannequin took a more theoretical strategy: it's (intentionally) much less concentrated on implementation and therefore doesn't have a actual storage suggestion. which you can use something storage could be acceptable (no matter if that contains storing them unordered, indexed with a B-tree, or each).

    now not simplest that, but this greater-stage algebra makes it possible for a system to use rules of replacement to optimise the query. as an instance, the usage of rules like the commutativity of ⋈ we are able to rewrite the question as:

    σ[sno=16](corporation) ⋈ provide ⋈ σ[pcolor=red](half)

    The database system can determine whether here is faster the usage of abilities concerning the storage, corresponding to any indices available and the dimension of the relations in query.

    This new model kicked off the "terrific debate" between Ted Codd (helping the relational mannequin and in the main backed by means of teachers) and Charlie Bachman (supporting CODASYL and typically backed by using DBMS clients).

    CODASYL changed into criticised for being simultaneously too complex and too inflexible to signify typical situations. list-at-a-time programming was also regarded too challenging to optimise.

    CODASYL advocates replied to this criticism by way of introducing their own set-at-a-time query languages that would additionally permit enhanced physical and logical facts independence. there have been additionally efforts to clean the model to make it more convenient to take note.

    The relational model changed into criticised for being too educational: relational algebra queries had been now not convenient to study or take into account. additionally, the relational model did not have a physical storage concept so it turned into now not firstly clear that an efficient implementation may even be built.

    Relational advocates spoke back to this through growing "natural" question languages in line with the relational algebra such as SQL. Implementations equivalent to system R and INGRES ultimately proved that the model was viable and that automated question optimisation may well be competitive even with very expert programmers.

    So both camps answered to the criticisms of the different and attempted to reach at options. In follow, these differences did not be counted as a whole lot as you could are expecting. Having in the past exclusively backed IMS, IBM modified its tune in 1984 and introduced twin guide for IMS and DB/2 (an early relational database). DB/2 become the newer and less complicated-to-use know-how, so naturally changed into chosen over IMS. This talents turned into sufficient to settle the situation.

    Tangentially, this additionally dependent SQL as the relational query language. these days, "relational" and "SQL" are often treated as synonymous, but at the time SQL had competition (corresponding to QUEL). There are people of the opinion that SQL isn't an excellent language for the relational mannequin, comparable to Hugh Darwen and C. J. Date, writers of The Third Manifesto. one in all their criticisms of SQL is that it isn't strictly the identical because the relational mannequin. for example, SQL permits an extra NULL price for absent or unknown advice. SQL relations additionally permit replica rows, that means they aren't sets.

    So, our instructions:

  • Set-at-a-time languages are first rate, even with the records mannequin, on the grounds that they offer tons enhanced actual statistics independence.
  • Logical information independence is simpler with an easy records model than with a posh one.
  • Technical debates are usually settled by means of the elephants of the marketplace, and infrequently for explanations that have little to do with the expertise.
  • query optimizers can beat all but the foremost listing-at-a-time DBMS utility programmers.
  • subsequent Time...

    we've looked at three eras of data models: IMS, CODASYL, and relational. we have now seen the significance of physical and logical statistics independence, the boundaries of hierarchical fashions, and the advantages of set-at-a-time high-degree query languages.

    At Grakn, we're constructing a knowledge base and trying to observe these training. we have a high-level set-at-a-time question language, with constructed-in reasoning enabling excessive logical facts independence. moreover, we use a flexible entity-relationship model (which you'll see in the subsequent post) to constitution our information.

    Relational databases continue to dominate and stay a vastly generic facts model even thirty years later. then again, greater contemporary competition from different fashions similar to graph databases and NoSQL has made the modern database landscape an awful lot greater different and has offered a brand new set of equipment to developers. within the next weblog post, we are going to analyze one of the key "publish-relational" fashions:

  • Entity-Relationship
  • prolonged relational
  • Semantic
  • Object-oriented
  • Object-relational
  • Semi-structured (XML)

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    C9050-548 Certification Brain Dumps Source : IBM IMS DBA

    Test Code : C9050-548
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    IBM C9050-548 Exam (IBM IMS DBA) Detailed Information

    C9050-548 Test Information / Examination Information

    Number of questions : 66
    Time allowed in minutes: 90
    Required passing score : 60%
    Languages : English

    C9050-548 Objectives


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