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Vendor denomination : Oracle
: 240 actual Questions

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Oracle Oracle MySQL 5 Certified

Oracle MySQL 5.5 eyes windows, SQL Server | killexams.com actual Questions and Pass4sure dumps

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New Names for solar Certifications under Oracle | killexams.com actual Questions and Pass4sure dumps

Written by way of GoCertify group of workers posted: 01 September 2010

With the merger of sun certifications into the Oracle certification application, disease every sun certifications for Java, Solaris, MySQL, and Open workplace were renamed under the Oracle manufacturer.

On September 1, 2010, Oracle built-in the current certifications from solar Microsystems' certification software into the Oracle Certifed professional program as section of the acquisition of sun by Oracle. each solar certification became renamed to replicate the brand unusual Oracle branding, as mapped out under. The content of the linked checks and scoring bear been not modified.

leap to: Java | Solaris | MySQL | OpenOffice

Java Certifications

customary sun callNew Oracle callSun certified Java associate Oracle certified associate, Java SE 5/SE 6 solar certified Java Programmer (SCJP) SE fiveOracle certified professional, Java SE 5 Programmer sun licensed Java Programmer (SCJP) SE 6 Oracle licensed expert, Java SE 6 Programmer sun licensed Java Developer (SCJD) Oracle licensed master, Java SE6 Developer sun licensed net section Developer (SCWCD) EE5 Oracle certified knowledgeable, Java EE 5 net section Developer solar certified company component Developer (SCBCD) EE5 Oracle licensed skilled, Java EE 5 company section Developer solar certified Developer for Java internet services 5 (SCDJWS) Oracle certified expert, Java EE 5 internet features Developer solar licensed commercial enterprise Architect (SCEA) EE5 Oracle licensed master, Java EE 5 traffic Architect sun certified mobile application Developer (SCMAD) Oracle certified expert, Java ME 1 cell utility Developer sun certified JSP and Servlet Developer for the Java EE6 Platform Oracle certified expert, Java Platform, enterprise version 6 JavaServer Pages and Servlet Developer sun certified EJB Developer for the Java EE6 Platform Oracle certified knowledgeable, Java Platform, enterprise edition 6 commercial enterprise JavaBeans Developer solar licensed JPA Developer for the Java EE6 Platform Oracle certified knowledgeable, Java Platform, commercial enterprise edition 6 Java Persistence API Developer solar licensed Developer for the Java internet features for the Java EE6 Oracle certified knowledgeable, Java Platform, enterprise edition 6 net capabilities Developer solar licensed Developer for the JSF for the Java EE6 Platform Oracle certified professional, Java Platform, traffic version 6 JavaServer Faces Developer solar licensed professional for NetBeans IDE Oracle certified skilled, NetBeans integrated development atmosphere 6.1 Programmer solar licensed Integrator for identity supervisor 7.1 This certification was retired with the aid of Oracle solar certified Java CAPS Integrator This certification become retired by way of Oracle  

Solaris Certifications

fashioned sun callNew Oracle callSun certified Solaris affiliate (SCSAS) Oracle certified affiliate, Oracle Solaris 10 working device sun certified system Administrator (SCSA) for Solaris OS 10 Oracle licensed professional, Oracle Solaris 10 device Administrator sun certified community Administrator (SCNA) for Solaris OS 10 Oracle certified expert, Oracle Solaris 10 community Administrator sun licensed safety Administrator (SCSECA) for Solaris OS 10 Oracle certified expert, Oracle Solaris 10 safety Administrator

MySQL Certifications

normal solar nameNew Oracle nameSun certified MySQL 5.0 Database Administrator (SCMDBA) Oracle certified professional, MySQL 5.0 Database Administrator sun licensed MySQL 5.0 Developer (SCMDEV) Oracle certified skilled, MySQL 5.0 Developer solar certified MySQL affiliate (SCMA) Oracle licensed affiliate, MySQL 5.0/5.1/5.5Sun licensed MySQL 5.1 Cluster Database Administrator (SCMCDBA) Oracle certified knowledgeable, MySQL 5.1 Cluster Database Administrator

OpenOffice Certifications

customary sun callNew Oracle callSun licensed OpenOffice.org Calc specialistOracle licensed expert, OpenOffice.org Calc sun certified OpenOffice.org stir professionalOracle licensed skilled, OpenOffice.org provoke solar licensed OpenOffice.org creator expertOracle certified professional, OpenOffice.org creator

The particular person assessments had been renamed as well, following the equal naming scheme. A pdf version of this listing that includes the examination names is obtainable on Oracle's blog.


Oracle Updates Its Linux Distro with pink Hat commercial enterprise Linux 7.6 Compatibility | killexams.com actual Questions and Pass4sure dumps

Oracle introduced the liberate and regularly occurring availability of the Oracle commercial enterprise Linux 7.6 operating gadget, a upkeep update synced with the upstream repositories of red Hat's pink Hat traffic Linux 7.6.

Derived from the sources of crimson Hat commercial enterprise Linux 7.6, the Oracle enterprise Linux 7 update 6 free up ships with Oracle's Unbreakable traffic Kernel (UEK) release 5 version four.14.35-1818.3.three for both 64-bit (x86_64) and ARM architectures, and the pink Hat arrogate Kernel three.10.0-957, which is only accessible for sixty four-bit techniques.

"existing functions in person district will continue to race unmodified on Oracle Linux 7 update 6 with UEK unlock 5 and no re-certifications are needed for applications already licensed with red Hat traffic Linux 7 or Oracle Linux 7," mentioned Avi Miller, Product management Director, Oracle Linux, within the liberate announcement.

here's what's unusual in Oracle commercial enterprise Linux 7 update 6

besides up to date kernels, the Oracle traffic Linux 7 update 6 liberate comes with numerous unusual features and improvements, together with support for managing path, mount, and timer systemd unit information within the Pacemaker component, as smartly because the means to track kit installations and upgrades using audit hobbies.

This unencumber additionally provides assist for encrypting keys in a depended on Platform Module 2.0 (TPM2) chip to the Clevis automatic encryption framework, a function that's handiest purchasable for 64-bit methods, support for obscure and remonstrate storage layouts in parallel NFS (pNFS), and multi-queue I/O scheduling for SCSI (scsi-mq).

A Technical Preview (TP) of DAX (Direct access) for EXT4 and XFS file systems is additionally available in Oracle traffic Linux 7 supersede 6 to permit direct persistent reminiscence mapping from an software. For AArch64 (ARM64) systems, this release allows for DTrace and ports the DTrace code in the Unbreakable commercial enterprise Kernel unlock 5 repo.

Oracle has stated that they're going to continue to assist the Btrfs file gadget in Oracle traffic Linux although red Hat deprecated Btrfs abet in the pink Hat suitable Kernel. which you could download Oracle traffic Linux 7 update 6 for gratis at this time via their Linux software portal or at once from Oracle.


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1Z0-870 exam Dumps Source : MySQL 5 Certified Associate

Test Code : 1Z0-870
Test denomination : MySQL 5 Certified Associate
Vendor denomination : Oracle
: 240 actual Questions

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MaxScale: A unusual Tool to Solve Your MySQL Scalability Problems | killexams.com actual questions and Pass4sure dumps

Written by Yves Trudeau

Ever since MySQL replication has existed, people bear dreamed of a sociable solution to automatically split read from write operations, sending the writes to the MySQL master and load balancing the reads over a set of MySQL slaves. While if at first it seems easy to solve, the reality is far more complex.

First, the tool needs to perform sure it parses and analyses correctly every the forms of SQL MySQL supports in order to sort writes from reads, something that is not as easy as it seems. Second, it needs to select into account if a session is in a transaction or not.

While in a transaction, the default transaction isolation flush in InnoDB, Repeatable-read, and the MVCC framework insure that you’ll obtain a consistent view for the duration of the transaction. That means every statements executed inside a transaction must race on the master but, when the transaction commits or rollbacks, the following select statements on the session can breathe again load balanced to the slaves, if the session is in autocommit mode of course.

Then, what effect you effect with sessions that set variables? effect you restrict those sessions to the master or you replay them to the slave? If you replay the set variable commands, you exigency to associate the client connection to a set of MySQL backend connections, made of at least a master and a slave. What about temporary objects relish with “create temporary table…”? How effect you deal when a slave lags behind or what if worse, replication is broken? Those are just a few of the challenges you mug when you want to build a tool to perform read/write splitting.

Over the eventual few years, a few products bear tried to tackle the read/write split challenge. The MySQL_proxy was the first attempt I am sensible of at solving this problem but it ended up with many limitations. ScaleARC does a much better job and is very usable but it stills has some limitations. The latest contender is MaxScale from MariaDB and this post is a road fable of my first implementation of MaxScale for a customer.

Let me first insert what is MaxScale exactly. MaxScale is an open source project, developed by MariaDB, that aims to breathe a modular proxy for MySQL. Most of the functionality in MaxScale is implemented as modules, which includes for example, modules for the MySQL protocol, client side and server side.

Other families of available modules are routers, monitors and filters. Routers are used to determine where to transmit a query, Read/Write splitting is accomplished by the readwritesplit router. The readwritesplit router uses an embedded MySQL server to parse the queries… quite clever and difficult to beat in term of query parsing.

There are other routers available, the readconnrouter is basically a round-robin load balancer with optional weights, the schemarouter is a way to shard your data by schema and the binlog router is useful to manage a great number of slaves (have a recognize at Booking.com’s Jean-François Gagné’s talk at PLMCE15 to notice how it can breathe used).

Monitors are modules that maintain information about the backend MySQL servers. There are monitors for a replicating setup, for Galera and for NDB cluster. Finally, the filters are modules that can breathe inserted in the software stack to maneuver the queries and the resultsets. every those modules bear well defined APIs and thus, writing a custom module is rather easy, even for a non-developer relish me, basic C skills are needed though. every event handling in MaxScale uses epoll and it supports multiple threads.

Over the eventual few months I worked with a customer having a challenging problem. On a PXC cluster, they bear more than 30k queries/s and because of their write pattern and to avoid certification issues, they want to bear the possibility to write to a single node and to load equilibrium the reads. The application is not able to effect the Read/Write splitting so, without a tool to effect the splitting, only one node can breathe used for every the traffic. Of course, to perform things easy, they expend a lot of Java code that set tons of sessions variables. Furthermore, for ISO 27001 compliance, they want to breathe able to log every the queries for security analysis (and too for performance analysis, why not?). So, high query rate, Read/Write splitting and plenary query logging, relish I said a challenging problem.

We experimented with a few solutions. One was a hardware load balancer that failed miserably – the implementation was just too simple, using only regular expressions. Another solution they tried was ScaleArc but it needed many rules to whitelist the set session variables and to restate them to multiple servers. ScaleArc could bear done the job but every the rules increases the CPU load and the cost is per CPU. The queries could bear been sent to rsyslog and aggregated for analysis.

Finally, the HA implementation is rather minimalist and they had some issues with it. Then, they tried MaxScale. At the time, it was not GA and was (is still) young. Nevertheless, I wrote a query logging filter module to transmit every the queries to a Kafka cluster and they gave it a try. Kafka is extremely well suited to record a great tide of queries relish that. In fact, at 30k qps, the 3 Kafka nodes are barely stirring with cpu under 5% of one core. Although they encountered some issues, recall MaxScale is very young, it appeared to breathe the solution with the best potential and so they moved forward.

The folks at MariaDB behind MaxScale bear been very responsive to the problems they encountered and they finally got to a very usable point and the test in the pilot environment was successful. The solution is now been deployed in the staging environment and if every goes well, it will breathe in production soon. The following figure is simplified view of the internals of MaxScale as configured for the customer:

MaxScale internals

The blocks in the figure are nearly every defined in the configuration file. They define a TCP listener using the MySQL protocol (client side) which is linked with a router, either the readwritesplit router or the readconn router.

The first step when routing a query is to apportion the backends. This is where the read/write splitting conclusion is made. Also, as section of the steps required to route a query, 2 filters are called, regexp (optional) and Genlog. The regexp filter may breathe used to irritated patch a query and the Genlog filter is the logging filter I wrote for them. The Genlog filter will transmit a json string containing about what can breathe institute in the MySQL universal query log plus the execution time.

Authentication attempts are too logged but the process is not illustrated in the figure. A key point to note, the authentication information is cached by MaxScale and is refreshed upon authentication failure, the refresh process is throttled to avoid overloading the backend servers. The servers are continuously monitored, the interval is adjustable, and the server status are used when the conclusion to apportion a backend for a query is done.

In term of HA, I wrote a simple Pacemaker resource agent for MaxScale that does a few fancy things relish load balancing with IPTables (I’ll talk about that in future post). With Pacemaker, they bear a plenary fledge HA solution with quorum and fencing on which they can rely.

Performance wise, it is very sociable – a single core in a virtual environment was able to read/write split and log to Kafka about 10k queries per second. Although MaxScale supports multiple threads, they are still using a single thread per process, simply because it yields a slightly higher throughput and the custom Pacemaker agent deals with the expend of a clone set of MaxScale instances. recall they started early using MaxScale and the beta versions were not dealing gracefully with threads so they built around multiple single threaded instances.

So, since a conclusion is needed, MaxScale has proven to breathe a very useful and supple tool that allows to intricate solutions to problems that were very difficult to tackle before. In particular, if you exigency to perform read/write splitting, then, try MaxScale, it is best solution for that purpose I bear institute so far. retain in touch, I’ll surely write other posts about MaxScale in the near future.


Customize your MySQL database in Docker | killexams.com actual questions and Pass4sure dumps

Many developers expend Docker to spin up a local database. This makes it easy to test their code and write data without installing and configuring a lot of tools. In this post I’ll clarify how you can customize your Docker database. I’ll clarify it for MySQL but it’s the selfsame for PostgreSQL! We will create a custom MySQL which contains your desired tables and data.

1. Create SQL scripts

We will create SQL scripts which hold the SQL statements they want to execute on their database. Create a directory in which they will work. too create a sub directory where they will store our .sql scripts.

$ mkdir -p ~/my-mysql/sql-scripts$ cd ~/my-mysql/sql-scripts

I want to customize my database with a table called employees. The table needs to hold one row with an employee (first name, eventual name, department and email).

Write a CreateTable.sql. This file contains the SQL statement to create a table called employees. They will add four columns to their table

CREATE TABLE employees (first_name varchar(25),last_name varchar(25),department varchar(15),email varchar(50));

Write a InsertData.sql. This file contains their statement to insert data in the table ‘employees’.

INSERT INTO employees (first_name, last_name, department, email) VALUES ('Lorenz', 'Vanthillo', 'IT', 'lvthillo@mail.com');

Execute the tree command to verify that your two scripts exist and are saved in the perquisite directory.

$ cd ~/my-mysql$ tree└── sql-scripts├── CreateTable.sql└── InsertData.sql 2. Create a Docker image for your customized MySQL Database

The scripts are ready. Now they can write a Dockerfile to create their own Docker image (based on the official image of MySQL).

$ cd ~/my-mysql/$ vi Dockerfile

Content of Dockerfile:

# Derived from official mysql image (our ground image)FROM mysql # Add a databaseENV MYSQL_DATABASE company # Add the content of the sql-scripts/ directory to your image# every scripts in docker-entrypoint-initdb.d/ are automatically# executed during container startupCOPY ./sql-scripts/ /docker-entrypoint-initdb.d/

Create your Docker image:

$ cd ~/my-mysql/$ docker build -t my-mysql .Sending build context to Docker daemon 4.608kBStep 1/2 : FROM mysqllatest: Pulling from library/mysqlDigest: sha256:691c55aabb3c4e3b89b953dd2f022f7ea845e5443954767d321d5f5fa394e28cStatus: Downloaded newer image for mysql:latest---> 5195076672a7Step 2/2 : ADD sql-scripts/ /docker-entrypoint-initdb.d/---> 25065c3d93c0Successfully built 25065c3d93c0Successfully tagged my-mysql:latest

And start your MySQL container from the image:

$ docker race -d -p 3306:3306 --name my-mysql \-e MYSQL_ROOT_PASSWORD=supersecret my-mysql

Now they can verify. They will exec inside the container:

$ docker exec -it my-mysql bashroot@c86ff80d7524:/# mysql -uroot -pEnter password: (supersecret)mysql> bespeak databases;+--------------------+| Database |+--------------------+| information_schema || company || mysql || performance_schema || sys |+--------------------+5 rows in set (0.00 sec) mysql> expend company;Reading table information for completion of table and column namesYou can turn off this feature to obtain a quicker startup with -A Database changedmysql> bespeak tables;+-------------------+| Tables_in_company |+-------------------+| employees |+-------------------+1 row in set (0.00 sec) mysql> bespeak columns from employees;+------------+-------------+------+-----+---------+-------+| domain | Type | Null | Key | Default | Extra |+------------+-------------+------+-----+---------+-------+| first_name | varchar(25) | YES | | NULL | || last_name | varchar(25) | YES | | NULL | || department | varchar(15) | YES | | NULL | || email | varchar(50) | YES | | NULL | |+------------+-------------+------+-----+---------+-------+4 rows in set (0.00 sec) mysql> select * from employees;+------------+-----------+------------+-------------------+| first_name | last_name | department | email |+------------+-----------+------------+-------------------+| Lorenz | Vanthillo | IT | lvthillo@mail.com |+------------+-----------+------------+-------------------+1 row in set (0.01 sec)

It works! They bear their customized MySQL database Docker image! This is a really sociable solution for local development between multiple developers. You can just share the Docker image and every developer can expend the database by just starting a container from the image.But in some cases this is not the best solution:

  • If you insert a lot of data your image size will grow significantly
  • Need to build a unusual image when you want to update the data
  • That’s why there is another way to customize your Docker MySQL.

    3. expend bind mounts to customize your MySQL database in Docker

    In this eventual chapter they will simply mount the scripts inside the official MySQL Docker container.

    $ docker race -d -p 3306:3306 --name my-mysql \-v ~/my-mysql/sql-scripts:/docker-entrypoint-initdb.d/ \-e MYSQL_ROOT_PASSWORD=supersecret \-e MYSQL_DATABASE=company \mysql

    And they can verify again! expend the selfsame steps as they did before: exec inside the container and check if the table and data does exist!

    Using this fashion is already more supple but it will breathe a miniature bit harder to divide among the developers. They every exigency to store the scripts in a unavoidable directory on their local machine and they exigency to point to that directory when they execute the docker race command.

    Conclusion

    In this blog I’ve described how you can create your custom MySQL database in Docker. We’ve explored the two methods:

  • Custom MySQL Docker image
  • Bind mounts to mount scripts inside container
  • We too saw some advantages and disadvantages of each method. Hope you enjoyed it!


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