|Exam Name||:||Oracle Database 10g: DBA Assessment|
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|Updated On||:||February 15, 2019|
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Is the Oracle-DBA relationship breaking down?
the world of the Database Administrator (DBA) has changed given that the know-how went mainstream in the Nineteen Seventies, writes Bruce Momjian, co-founding father of the PostgreSQL world construction group. Over the last forty years three or four providers have sought to dominate the market and have invested closely in constructing the “Rolls Royce” of databases for mission-vital on premises applications. When the Oracle database marked its thirtieth birthday in 2007, it felt just about like a cult gathering as every person in the Moscone core gave Larry Ellison a standing ovation as he arrived for his keynote.
It became an understandable response, since the DBAs within the audience had additionally invested heavily in fitting Oracle specialists. That thirtieth party became symbolic of the unstated contract between DBAs and Oracle at the moment. both have been closely elegant on one another. quick forward to these days, even though, and the connection is altering. more and more DBAs are questioning their on-going reliance on Oracle. once I meet Oracle customers, I ask them one intentionally provocative question: assuming that you are chuffed with Oracle today, will you still be chuffed in five years time?Bruce Momjian, co-founder of the PostgreSQL world development community
Given how shut the connection between DBAs and Oracle has been traditionally, it's enjoyable to notice how individuals respond. in the beginning there is a few amusement or dismissive snorts of “Of direction i will be able to!”
but when we start to unpack how market dynamics have modified and accept as true with the brand new alternatives that exist as a result of open supply, the temper adjustments.
extra basically as we discover what these DBAs need from their database structures it prompts reflection and acceptance that whereas Oracle has been the defacto database common on premises it may no longer be the choicest choice relocating ahead, mainly as organizations seek enhanced flexibility and agility from their database infrastructure. via the conclusion of these periods we often have a extremely energised viewers desirous to exit and discover the knowledge of open supply-primarily based databases such as PostgreSQL.nowadays’s reality: Oracle and the DBA group Drifting aside?
considering that the database is so critical to Oracle’s Cloud method, you could possibly suppose Oracle would do everything possible to keep its traditionally potent bond with the DBA community. however, as with any relationship, circumstances alternate and sometimes these worried waft aside. So what has caused this relationship to smash down?F1 On-Premises Database
Oracle has developed an on premises database that has so a lot functionality it can be described as the system One equal of a database. i might stick my neck out and say that 95% of the configuration info for the enormous majority of databases have not been modified on account that deployment. that implies DBAs wouldn't have all of the functionality Oracle presents. Gartner has spoke of that open supply databases could handle 95% of all latest database necessities, so it can be no shock that builders are turning to open source alternatives for faster, extra agile databases that bring what they need, no longer what the supplier thinks they need.Barebones Cloud Database
while DBAs are used to feature-prosperous on premises Oracle databases the equal can not be talked about for the Oracle Cloud. Gartner has counseled that Oracle Cloud is a minimal attainable product and that is rarely miraculous, because Larry Ellison has admitted that era 2 of the Oracle Cloud has required a complete re-structure of its know-how. This should serve as a warning that DBAs may still now not are expecting like-for-like equivalency within the Cloud!The independent Database
Oracle revenue executives position it as a method to release DBAs to do more; although, their bosses are extra attracted to appealing to company decision makers, explicitly announcing it can be an opportunity to reduce prices…probably the most costly of which is the DBA operating the database! despite this blunt possibility the truth is that self reliant technologies will, in the lengthy-term, turn into a characteristic of database technology. This impending trade is encouraging DBAs to re-consider their database thoughts; this is now not necessarily a reevaluation in Oracle’s favour.The Cloud changes Market Dynamics
In these days’s digital world, the place agility and value are the main drivers, the enterprise case for Oracle is becoming harder to justify. As automotive manufacturers talk about a future with mobility as a service in place of patrons owning automobiles, in a similar fashion DBAs are being advised they don’t should “personal” databases on premises. reasonably they may still change to Cloud-based capabilities, but the danger is that while these “all that you may devour” contracts look attractive, shoppers can rapidly rack up big expenses for databases that aren't healthy for the challenges they face. developers wish to spin up cases far more rapidly and at much less charge than ordinary on-premise databases. The Cloud gives them the capability to stream faraway from the likes of Oracle to cloud-native alternatives that offer greater flexibility and are extra fit for his or her particular applications.The option: A Time for Pragmatic Reflection
I recognize that for Oracle diehards what i am asserting is nothing wanting heresy, but there are many pragmatic DBAs obtainable who recognise that a schism is occurring. The combination of the on-going fallout from the financial disaster (which has suppressed IT budgets for decades) and the urgency of responding to the digital period is forcing cool-headed, pragmatic reflection.
Take, as an example, Oracle actual application Clusters (RAC). It turned into at the beginning developed as AWS turned into simplest getting off the ground and Larry notion the future become Grid Computing (he famously known as Cloud “complete gibberish” again then!) It took many years to ultimate, however it became located as the answer to the enormously performant, professional databases that everybody envisioned we would want for cyber web 2.0.
nowadays, we hear commentators talking about records lakes, which in conception may still be very best to RAC. really, RAC is incredibly advanced, expensive and not scalable sufficient for such initiatives. it is why Oracle has struggled to benefit traction with the information superhighway unicorns which are dominating enterprise today. they have grew to become to a wide variety of open supply-based mostly options that can supply the extra instant and applicable performance crucial to scale their corporations.
Even the smartly-based information superhighway giants – those that you possibly can predict would want the whole may of Oracle database functionality – are looking for to become independent from. closing 12 months there have been rumours about Salesforce looking to circulation off Oracle and more currently, Amazon net capabilities (AWS) has been frank about its want to stream off Oracle. Of path, this makes for incredible media headlines, but the underlying message is clear – Oracle is costly, the performance isn’t preferrred to the digital era and there are lots of credible options available.the long run: Do you have a five-12 months Database Plan?
We shouldn’t be stunned that many DBAs view Oracle as a legacy database platform that is not fit for the calls for of digital company. more and more, I predict we will see DBAs answering my original question through moving far from Oracle, since it can not present the level of innovation they're going to require in the future. And for those who are still in doubt or evaluating their alternatives then i might recommend some basic checks:
no matter if you're when you consider that options to Oracle or agree with Oracle is the correct option, essentially the most vital point is that you simply have to birth planning as early as viable.
there are lots of elements to trust from the technical requirements to the licensing implications of your database alternative – each at time of implementation and into the future. primarily it is critical to select the database that fits your business wants. If the course for the IT department is selected and clear, then it can be brilliant to make use of a closed source database corresponding to Oracle. besides the fact that children, at the moment it is uncommon that a business has such walk in the park. in case your business is disturbing more advantageous flexibility from IT, since the strategic path is fluid, then it makes experience to consider open supply-primarily based alternatives. this can supply DBAs the probability to adjust the database strategy because the course of commute for the company adjustments, allowing for the exploration of different markets and consumer demand.
Bruce Momjian is co-founder and core team member of the PostgreSQL international construction group, and has worked on PostgreSQL due to the fact that 1996. He has been employed by means of EnterpriseDB, the database platform company, due to the fact that 2006
on account that Oracle first designated its self reliant Database expertise in October 2017, database directors, or DBAs,...
have puzzled how the automated cloud environment could have an effect on their jobs -- or no matter if they'll quickly be searching for brand new ones.
as with all new know-how, the difficulty isn't so clear-reduce. tons will rely upon the extent to which an organization adopts Oracle autonomous Database, how administration treats the alternatives that include it and how DBAs respond to the altering local weather. what's definite, however, is Oracle DBA responsibilities are altering, and the important thing to handling that alternate is a versatile and adaptable approach.
autonomous Database, which officially debuted with the launch of an information warehouse service in March 2018, leaves little for DBAs to do when it involves day by day operations. They may not ought to patch, update, tune or perform different simple database administration projects. in keeping with Oracle, the expertise takes care of all administrative processes, leaving DBAs to center of attention on larger-degree priorities, such as modeling statistics, preserving delicate advice and optimizing application performance.
Oracle additionally claims, by automating mundane Oracle DBA responsibilities, customers can shop greatly on the cost of maintaining databases working. self sufficient Database combines Oracle Database 18c with computing device studying algorithms and automatic scripts. since it exposes no administrative controls, DBAs aren't any longer necessary for every day operations. moreover, databases are much less prone to the types of human error that can result in downtime, negative efficiency, corrupt or compromised information, or different expensive pursuits.DIY database administration
autonomous Database additionally allows developers, facts scientists and facts stewards to enforce or replace databases without DBA intervention, simplifying their work procedures and, expectantly, increasing productivity. As a part of the preliminary Oracle independent data Warehouse Cloud service, a user can install a data warehouse within minutes, chopping DBAs out of the photo altogether.
DBAs may doubtlessly be up in opposition t IT managers who turn to self sustaining Database primarily to cut personnel. New groups can also decide to enforce their database techniques in the cloud atmosphere without bringing on any DBAs. And corporations that present information administration capabilities might see their shoppers disappear, forcing them to pare down on DBA components, as databases develop into extra automated.
despite the fact, agencies need to accept as true with this worst-case state of affairs: The independent Database provider fails or information turns into corrupted, however they have no DBAs to assist them within the healing method. As tempting as it can be to cut out the middleman, businesses can be left in the lurch with no DBA and might deserve to bring in high-priced consultants if things go awry.particulars on Oracle's self sustaining Database technologies don't panic yet, Oracle DBAs
Most DBAs would gladly surrender the drudgery of patching, updating and backing up databases.
obviously, many questions deserve to be resolved before assuming any Oracle DBAs should be given the boot. also, transitions like this take time -- notably given the independent Database product providing doesn't yet consist of the entire planned elements, together with a transaction processing service. On desirable of all that, many agencies are nonetheless unwilling to have faith cloud features, not to mention use them to host their most sensitive information.
companies with heavy investments in their current IT infrastructures are also much less prone to circulation right now to the self reliant Database expertise. many of them aid colossal, advanced programs where the DBA is still a important player. definitely, most DBAs have already got greater work than they could deal with and would gladly quit the drudgery of patching, updating and backing up databases.
Most expertise is edging toward accelerated automation and autonomy -- a move now not likely to trade anytime soon. IT employees have had to adapt hence and may continue to adapt -- and never just on account of automation. different movements have additionally affected how individuals work -- consider DevOps or the citizen developer -- but they have not diminished the want for certified specialists.an opportunity to trade DBA methods
Oracle autonomous Database represents a continuation of an ongoing system, with the DBA incessantly moving from an operational center of attention to a enterprise focal point that places statistics at center stage. With this trend come new alternatives to redefine Oracle DBA obligations for safeguarding and managing records, in addition to optimizing software performance. For some, these changes won't come quite simply, however they may be inevitable however; DBAs should still take anything steps critical to put together for their arrival.
for many DBAs, this without problems means continuing with what they've been doing all along: discovering new abilities, being open to diverse company fashions and closing flexible within the face of a altering industry. New applied sciences like Oracle autonomous Database have a method of featuring alternatives not readily apparent when first added.
it's not to say it'll at all times be a simple transition or that management won't fall victim to shortsighted goals. however for most corporations, the DBA's value will now not scale down -- besides the fact that children Oracle DBA duties will possible evolve from a database-centric point of view to one which specializes in facts as an entire. most likely the key for DBAs is to start pondering of themselves extra as statistics engineers than as database directors -- a transition that many have already been making.
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Oracle’s 12c update to their DBA Associate exam packs a punch.
1Z0-062: Oracle Database 12c: Installation and Administration
Reviewer's SummaryThis test is harder than would generally be expected for an OCA certification. A large number of topics and high question count make it a challenging proposition.
Time Limit150 minutes
Number of questions 95
Counts towardOracle Database 12c Administrator Certified Associate
Exam Objectives1Z0-062 Exam Objectives
1Z0-062: Oracle Database 12c: Installation and Administration is one of two exams required to become an “Oracle Database 12c Administrator Certified Associate”. This exam is often the first or second exam taken by IT professionals just starting their career with the Oracle database. As career choices go, Oracle Database Administration has a great deal to recommend it. Even during the worst of the recession, I never saw a time when hiring truly stopped in my region (although it certainly slowed for some time). For the past few years, every time I check the job sites, there are new listings for Oracle DBAs. I’m not in the market for a new position, but it is always comforting to know that if I were, there are options available.
Since release 10g, the Oracle Database Administrator Certified Professional track has consisted of three exams. This includes 1Z0-062, a SQL exam (there are several that qualify), plus an ‘Admin II’ exam. Oracle University has not yet released 1Z0-063: Oracle Database 12c: Advanced Administration even to beta status, but they have announced its existence. The complete 12c track will follow the model of 10g and 11g with a total of three exams. That said, the 1Z0-062 exam is a far cry from its 11g predecessor. Oracle University moved a significant number of topics into it that had been present in the Admin II exam for the 11g certification. Some of the shifted topics include those for database performance as well as management of storage, system resources, and memory. Overall, the number of topics increased from 50 in 11g to 85 in 12c. That makes a 70 percent increase. The exam also has the highest question count of any of the Oracle certifications that I track.
I took this exam during its beta period, so my experience will not be quite the same as users taking the production exam. The one I took had 150 questions. Unfortunately, I do not recall whether I had 150 or 180 minutes to complete it. I remember being under significant time pressure to complete the last of the questions. Regardless which of the two durations it was, the production exam offers candidates more time to complete each question, so you should experience less pressure. With a bit over 90 seconds per question, the sticking point is not going to be whether you have enough time to thoroughly read the question and answers but whether you studied enough to be able to recognize the correct answer when you see it.
The exam covers a huge range of topics. I have distilled the list to the following set (visit the Exam Objectives link for the complete list):
Every topic included on this exam is one that Oracle database administrators really should know in order to be able to do their job effectively. However, before you get done preparing for this exam, you might find yourself wishing that Oracle University had decided to go back to the four-test OCP model that was used until release 9i of Oracle. That would have allowed them to spread the administration topics among three exams rather than two.
I was not as well prepared on the day of the beta exam as I normally am for certification tests. It was a last minute decision involving a free voucher and the last week of the beta period. The experience was not a pleasant one as I noted on my blog the day after the exam. I would love to be able to state with conviction that my troubles could be laid at the feet of having taken the test on Friday the 13th, but I know better. Despite everything, I passed the exam (barely). I have to wonder if one of the graders took pity on me, though.
Even fully prepared, this exam would have been harder than I expected. There is no doubt in my mind that it is more difficult than the 11g Admin I test was. When 1Z0-062 is compared to 1Z0-052, it has more topics, a larger number of advanced topics, and I believe that there was a smaller percentage of what Oracle University considers its ‘Learner Level’ questions besides.
I often classify the difficulty of exams as OCA-level, OCP-level, or OCE-level to indicate increasing degrees of difficulty. In my experience, the test developers at Oracle University seem to have a target level of difficulty based on those three certification classes. The 1Z0-062 exam, however, is an OCA certification that is bordering on OCP-level difficulty. Be sure to budget sufficient time to prepare thoroughly. When making a choice between being over-prepared or under-prepared, I highly recommend selecting option one. Good luck on the exam.About the Author Matthew Morris is an experienced DBA and developer. He holds Oracle DBA Certifications for releases 7, 8i, 9i, 10G and 11G; is an Oracle Advanced PL/SQL Developer Certified Professional; and holds Oracle Expert Certifications for SQL, SQL Tuning, and Application Express. He is the author of several Oracle certification guides. His Web site, www.oraclecertificationprep.com, is dedicated to providing links to resources for Oracle certification preparation.
It is quite common nowadays to see DBAs supporting databases from different vendors. Although much is common between database products, there are also many differences that can be a challenge for a DBA or a database developer who is new to a particular database product.
The purpose of this article series is to present Oracle 10g features from a SQL Server 2005 stand point.
In this article, I introduce you to the concept of Instance and Database which is a key term in understanding RDBMS architecture. Like anything you build, be it a nest of Taj Mahal, the foundation is the key.Instance and Database
In Oracle, processes (background processes) and memory allocated make up an instance.
Database refers to the physical files(.dbf and .log etc). Having a database is not necessary to run an instance. If the instance is not part of parallel server configuration (Real Application Clusters) the relationship between an instance and a database is always 1:1. The main properties of an Oracle instance are specified using the initialization parameter file (pfile or spfile). When the instance is started, the parameter file is read and the instance is configured accordingly.
Having a database is not necessary to run an Oracle instance.
In SQL Server, an instance refers to processes, memory allocated and physical files associated with default system databases used by that particular installation. By default SQL server installation comes with a set of system databases (with its own hierarchy of objects and settings).
In SQL Server, the settings for the instance are stored in the registry, master/resource database and msdb database.
To an Oracle DBA, creating a database means creating an entire database system that contains control files, redo logs and, data dictionary and tablespaces. In the coming section, we will discuss what these objects are and how they are mapped to the SQL Server equivalents.
In SQL Server, these tasks are accomplished as part of the installation process. Hence creating a database in SQL Server implies adding a user database to the already existing system databases.
One SQL Server instance can hold more than one user defined database and the instance and database ratio is 1..32767.
Oracle storage architecture encompasses,
a) Permanent tablespaces
b) Undo tablespaces
c) Temporary tablespaces
In SQL Server, file groups are of two types, primary and secondary. System wide tablespaces in Oracle include,Oracle Schema
The objects that a user owns are collectively called schema. A schema is bound to exactly one user. A SQL Server database has the features of an Oracle scheme because objects are created inside the database.
In Oracle, the schema and tablespace have independent identities – objects of a schema can be created in different tablespaces, and a single tablespace can contain objects from multiple schemas. In this context, SQL Server databases are similar to Oracle tablespaces – an owner can create objects in different databases, and a database can contain objects from different schemas.Summary
Oracle’s functional equivalents in SQL ServerOracle SQL Server System tablespace Master/Resource database Sysaux tablespace MSDB database Database template files(Data warehouse, General purpose, Transaction processing) Model database Undo tablespace Tempdb Database/Transaction Log Temp tablespace Tempdb Redo Log Transaction Log Schema/User Schema, Not a User
Jul 5, 2018Simon Pane
At Oracle OpenWorld 2017 and in subsequent company announcements, Oracle has made it clear that it currently has two key focus areas: the Autonomous Cloud Database, starting with the Autonomous Cloud Data Warehouse, and security.
There’s a lot of publicity right now on the first item as it is new and revolutionary in many ways. But the second area also deserves attention as it’s something that affects us all.
Whether you’re an Oracle system or database administrator, an IT manager, or executive, or even just an end user or customer, security should be as important to you as almost anything else. We all hear about breaches in the news all too often. From the executive level to the end customer, none of us want to be anywhere near such a breach.
And, consider timelines: We may or may not be considering a cloud migration or implementation of the Autonomous Cloud Data Warehouse via a proof of concept (PoC) or even a flushed-out road map. That is future-looking or, at best, a work in progress. Security concerns are immediate, affecting us right now, as well as in the future.
So are there action items we can take right now? The answer is definitely yes!What Did Oracle Announce?
Oracle has announced several facets to improving its, and our, security posture. First of all, the new Autonomous Cloud services such as the Autonomous Cloud Data Warehouse will include automatic patching and machine learning for intrusion detection and anomaly pattern detection.But again, what about the rest of us—what can we do with our existing systems right now—regardless of whether our systems are old or new or on-premises or in the cloud? The answer is the Oracle Database Security Assessment Tool, or DBSAT.What Exactly Is DBSAT?
First of all, DBSAT isn’t new. It actually first came out somewhat quietly in 2016 and has been downloadable from My Oracle Support (MOS) ever since. But it did get heavy promotion from Oracle at OOW 2017 in keynotes and lecture sessions, and Oracle subsequently released a major new version, release 2.0.1, in December 2017.
DBSAT is designed to be a small, lightweight command-line tool, run by Oracle DBAs. And its focus is on the database tier: the database and related server settings. It supports most of the major operating systems and Oracle Databases from version 10.2.0.5 onward.DBSAT produces output in various formats, including HTML for interactive reviews and JSON for ingestion into other tools.Where Can We Get Quick Benefit?
Ideally we’re using security tools and performing security reviews proactively to constantly improve our security posture. Realistically, that’s not always the case. The reality is that sometimes security is reactive.
For example, what if we get a Monday morning surprise such as: “Management wants a security report on their desk by end-of-day today,” “We suspect there may be some internal bad actors—everything must be locked down as much as possible,” “Application X now falls under new regulatory requirements that we must be in alignment with ASAP,” or, “Auditors are coming this week and nobody told us”?
Again, let’s emphasize that security shouldn’t be reactive and done only to appease auditors, management, and/or external regulations. It should be part of the design criteria and constantly measured to ensure that implementations match technical specifications, corporate policies, industry best practices, and required regulations. But regardless, DBSAT can help with all of the above. And, do it quickly.
Running the collector and reporter can be really simple and, in most circumstances, should only take a matter of minutes to complete with minimal load to the database. After all, it’s only querying metadata.
Keep in mind that the reports should be considered “sensitive” as they likely expose weaknesses or deficiencies that a bad actor could capitalize on. For this reason, the tool includes the option to encrypt the collected data and reports though it just uses standard ZIP encryption. If more robust encryption is required, then you’ll need to encrypt separately.
Overall, the findings cover a wide variety of security aspects related to the database, listener, and OS. And, includes, where appropriate, tags indicating whether the finding relates to CIS (Center for Internet Security), recommendations, or can be of assistance with EU General Data Protection Regulation (GDPR) compliance verification.The New ‘Discoverer’ Module
A brand new Discoverer module was introduced with DBSAT 2.0.1. Oracle probably could have created this as a brand new standalone tool, but instead it integrated it with DBSAT. This is a good thing, as Oracle Support already provides us with too many independent tools for various purposes.
The new Discoverer module can be used to search the data dictionary for sensitive data. This may be necessary if required to identify, for example, personally identifiable information (PII) and sensitive personally identifiable information (SPII).
The search flexibility is actually quite impressive for the first generation/release of this module. And, the results can be categorized. Oracle provides a pretty decent configuration file to get you started, and, of course, it’s fully customizable and extensible.Oracle’s Security Focus
Security should be on everyone’s mind and in the forefront of their activities. If it’s not already, it should be. And, assessing security is an iterative process, meaning: Assess, review, adjust—and repeat.
Oracle’s renewed focus on security and the updated DBSAT is a valuable tool to help us all in this area. Regardless of whether we have an old Oracle 10g database running on-premises or a brand new Oracle 18c cloud instance, DBSAT is a valuable asset. And, while it is at a level of maturity where it doesn’t do absolutely everything anyone could possibly want, it definitely does provide enough functionality and value to make it a must-have for supporting any Oracle database.
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