All posts by crbtech

Join the DBA training in Pune to make your career in DBA

In today’s E-world, DBA makes ways to store the data in an organized way and manage everything digitally.

Oracle DBA will definitely hold importance as long as databases are there. But we need to keep developing ourself and be updated with the newest technology. If you have the ability to note down the data properly and strategise your work or data in a better way, then you are the best to become a database administrator.

There are many new evolving technologies in DBA like Oracle RAC, Oracle Exadata, Golden Gate, ADM, Oracle Cloud etc. These are new places that promise growth on which you can make money. These technologies are relatively new and experienced professionals are less, which helps create many job opportunities.

Know your field of interest and start developing your skillset for a promising career in the field of DBA.

DBA training in Pune is always there for you to provide the placement as a DBA professional and we at CRB Tech have the best training facilities. We will provide you the 100% placement guaranteed.

Thus, DBA training would be the best option for you to make your career in this field .

What can be the better place than CRB Tech for DBA training in Pune?

DBA institute in Pune will help in you in understanding the basic concepts of DBA related ideas and thus improve your skills in PL/SQL queries.

CRB Tech is the best institution for DBA in Pune.

There are many institutes which offer training out of which CRB Tech stands apart and is always the best because of its 100% guaranteed placements and sophisticated training.

Reason for the best training in CRB Tech:

This has a variety of features that ensure that is the best option from among other DBA programs performed at other DBA training institutions in Pune. These are as follows:

1. You will definitely be a job holder:

We provide a very high intensive training and we also provide lots of interview calls and we make sure that you get placed before or at the end of the training or even after the training and not all the institutes provide such guarantees.

2. What is our placement record?

Our candidates are successfully placed in IBM, Max secure, Mind gate, saturn Infotech and if you refer the statistics of the number of students placed it is 100%

3. Ocean of job opportunities

We have lots of connections with various MNCs and we will provide you life time support to build your career.

4.LOI (Letter of intent):

LOI is offered by the hiring company at the starting itself and it stands for Letter Of Intent and after getting that, you will get the job at the end of the training or even before the training ends.

5. Foreign Language training:

German language training will help you while getting a job overseas in a country like Germany.

6.Interview calls:

We provide unlimited interview calls until the candidate gets placed and even after he/she gets placed he/she can still seek help from us for better job offers. So dont hesitate to join the DBA training in Pune.

7.Company environment

We provide corporate oriented infrastructure and it is in such a way that the candidates in the training will actually be working on the real time projects. Thus it will be useful for the candidate once he/she get placed. We also provide sophisticated lab facilities with all the latest DBA related software installed.

8.Prime Focus on market based training:

The main focus over here is dependent on the current industry related environment. So we provide such training in your training days. So that it will be easier for you to join the DBA jobs.

9.Emphasis on technical knowledge:

To be a successful DBA, you should be well aware of all the technical stuffs and the various concepts of SQL programming and our DBA training institutes have very good faculties who teach you all the technical concepts

Duration and payment assistance:

The duration of the training at our DBA institution in Pune is for

4 months.

The DBA sessions in Pune run for 7-8 hours on Monday to Friday.

Talking about the financial options:

Loan options:

Loan and installment choices are made available for expenses of charges.

Credit Card:

Students can opt the option of EMI transaction on their bank cards.

Cash payment:

Fees can also be paid in cash choices.

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Memcached And It’s Importance

Memcached distributed caching solution is very much enough for you if you want to develop a high-performance large scale web application. No doubt it is definitely a popular distributed caching system.

In the year 2003, it was created by Brad Fitzpatrick and there are many applications like PHP where they are heavily used.

Working of Memcached :

Sharding of the keys is the basis for Memcached distributed caching architecture. In a dedicated shard, each key is stored that is supported by one or more machines.

For scaling better and caching bulk data is supported by this approach. RAM limit is the maximum set up that a single machine can cache. There are lots of machines added to your system and it will really cache bulk data in the case of Memcached.

For storage and retrieval of the offered key without the knowledge of user about the actual storage is assured by the system.

Popularity Behind Memcache :

There are lots of web applications which is famous in Memcache. Here are few key benefits of using a distributed caching solution called Memcached.

  • Since there is a reduction in IO there is a much faster application and most of the data is served from RAM.

  • Better usage of RAM- There are multiple servers which has lots of RAM left unused and thus you can easily find the machines as nodes to a Memcached system and just use it to the core.

  • Instead of a scale-up application can be scaled out.

Usage of Memcached :

It is a famous library which uses thousands of apps and is very much popular. Here are few popular names that use Memcached.

  • Craiglist

  • Wikipedia

  • WordPress

  • Flickr

  • Apple

Things To Note About Memcached :

It is a very reliable solution but then there are certain things to note about it:

  • RAM storage: Because of the RAM storage of data this makes it much faster and it is very much easy to lose. There is no persistence of data with respect to a storage system. If you find power loss or server crash all the data will be lost in Memcached.

  • As it is frequently found in RAM you need to start the cache after every restart. Thus serving data to cache or storage must be known by the programmer.

  • The persistence and updating of data in various situations must be taken care of by the application developer as there is no persistence in any storage.

  • There are no support transactions done by Memcache and this needs to be a big consideration if you are using a cache transactional data.

  • For producing a lot of garbage in memory it can be CPU intensive.

For more information join the DBA Training Course to make your career in this field.

Stay connected to CRB Tech for more technical optimization and other updates and information.

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Teradata

Define Teradata :

Do you know one of the most famous Relational Database Management System? It is called Teradata. For the purpose of constructing large-scale data warehousing applications, it is mainly suitable. The parallelism concept is achieved by the concept of Teradata. The company called Teradata developed it.

Evolution of Teradata :

Here is a list of achievements and progress of Teradata over the years:

  • 1979: Incorporation was done by Teradata.

  • 1984: First database computer DBC/1012 was released.

  • 1986: Teradata was named by Fortune magazine as Product of the year

  • 1999: Using Teradata with 130 Terabytes was considered as the largest database in the world.

  • 2002: With Partition Primary Index and Compression, Teradata V2R5 was released along with compression.

  • 2006: Master Data Management Solution is done by Launch of Teradata.

  • 2008: Active Data Warehousing was released by Teradata 13.0.

  • 2011: Advanced Analytics Space has been entered by Acquired Teradata Aster.

  • 2012: Version 14.0 of Teradata was introduced.

  • 2014: Version 15.0 of Teradata was introduced.

Features of Teradata:

Here are few features of Teradata:

No Sharing Architecture: Shared Nothing Architecture or No Sharing Architecture is the other name for Teradata architecture. The disks linked with AMPS, Teradata Nodes, and Access Module Processors (AMPs) work independently. There is no sharing done with others.

Parallelism that is unlimited: Massively Parallel Processing (MPP) Architecture is the basis for Teradata database system. The workload is divided evenly across the entire system by MPP architecture. Among its processes, the tasks are split by the Teradata system and run a parallel system for being sure of a completed task quickly.

Linear Scalability: There is a high scalability of Teradata systems and the scaling limit is up to 2058 Nodes. For instance, the capacity of the system can be doubled by doubling the number of AMPs.

Connectivity: Channel Attached systems are connected with Teradata like Mainframe or Network attached systems.

Mature Optimizer: One of the matured optimizers in the market is called Teradata optimizer. Since the starting, it can be designed in parallel. For each release, it has been refined.

SQL: For interacting with the data stored in tables, Teradata supports industry-standard SQL. Apart from that, it offers its own extension.

Robust Utilities: Robust utilities are offered by Teradata for importing or exporting data from/to Teradata systems like FastLoad, FastExport, MultiLoad, and TPT.

Automatic Distribution: The data is distributed automatically with Teradata evenly to the disks and there is no need of any manpower over here.

Join the DBA Course to know more about Teradata effectively.

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Important Things About Hadoop and Apache Spark

In the big data space, they are seen as competitors but the main feeling is that they are better together with growing consensus. If you go through an reads about big data you will get to know about the presence of Apache Spark and Hadoop. Here are their brief overlook and comparison.

1) There are lots of things they do:

The two big data frameworks are Hadoop and Apache Spark but there is no same purpose that is actually served. Across various nodes, it shares massive data collections inside a cluster of commodity servers that you need not buy and handle commodity servers and it means you don’t need to buy or maintain expensive custom hardware. A data processing tool in spark, on the other hand, works on distributed data collections and it doesn’t do shared storage.

2) They both are independent:

There is not only just a storage component in Hadoop called Hadoop Distributed File System as you can also find MapReduce a processing component and there is no need of a spark to get it done. It is possible to use Spark without the need for Hadoop. There is no own file management system in Spark and it needs to be combined with one apart from that if HDFS is of no use then you can find another cloud-based data platform and the Spark was designed for Hadoop, however, there are lots of people who agree that they work better together.

3) Spark is faster:

MapReduce is generally slower than Spark because the latter’s way of processing the data. The operation of MapReduce is done in steps throughout the data in one fell swoop. This is how the MapReduce workflow looks like, “ the cluster reads the data work an operation and the clusters are written with results and the cluster reads the updated data and the next operation is performed, produce next result to the cluster etc. In memory and in near real-time the Spark completes the full data analytics and the data from the cluster is read for working all requisite analytic workings. Thus Spark is 10 times faster than MapReduce and 100 times faster than in-memory analytics.

4) Spark’s speed is not required for you:

If your data operations and reporting requirements are mostly static and you can stay for batch mode processing then your MapReduce processing would be just fine. On streaming data, if you need to do analytics like from sensors on a factory floor or possess applications needing multiple operations, then you need to go with Spark. For instance, there are lots of operations required and common applications for Spark are a real time marketing campaign, along with online product recommendations, analytics, machine log monitoring etc.

Thus join DBA Course to know more about Hadoop and Apache Spark.

Stay connected to CRB Tech for more technical optimization and other updates and information.

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APACHE IGNITE

An in-memory computing platform called as Apache Ignite can be inputed between a user’s application layer and data layer. From the current disk-based storage layer into RAM, enhancing six orders of magnitude and performance.

For handling peta bytes of data to which the in-memory data capacity can be easily scaled. Both the ACID transactions and SQL queries are further supported. Scale, performance, and comprehensive capabilities far above and beyond what traditional in memory databases, data grids are offered by Ignite.

For ripping and replacing their existing databases there is no need of users for Apache Ignite. It works with NoSQL, RDBMS, and Hadoop data stores. Fast analytics, real-time streaming, high performance enabling are some of the Apache Ignite highlights. A massively parallel architecture, used a shared, affordable commodity for current or new applications power. On premises, Apache Ignite can be run and on cloud platforms like Microsoft Azure, and AWS are in a hybrid environment.

Key Features

There is an in-memory data grid for handling distributed in-memory data management and it is contained in Apache Ignite. You will find object based, ACID transactional, failover, in-memory key value store, etc. On the contrary to traditional database management systems, primary storage mechanism are used by the Apache Ignite.

Instead of disk if you are using the memory then it increase its speed upto 1 million times faster than traditional databases.

Free-Form ANSI SQL-99, compliant requires with actually no limitations is supported by Apache Ingite. There are use of any SQL function, grouping, or aggregation, and it aids distributed, non co-located SQL joins and cross cache joins. The field queries concept of backing up to reduce the serialization and network overhead is also supported by Ignite. A computer grid for enabling parallel in memory processing is included in the Apache Ignite. There are other CPU-intensive or other resource-intensive tasks like traditional MPP, HPC, fork-join, and Map Reduce processing. For Standard Java Executor Service asynchronous processing is backed up by Apache.

Join the DBA course to make your career in this field.

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Core Security Areas in MongoDB

There are new innovations in MongoDB security. There are lots of news and stories revealing how hackers use seizing MongoDB databases and ransoming data for bitcoins.

There is always a worry about security and if you run database, networks, applications, is always a prime issue. There are lots of companies to open source software and the reason is MongoDB for storing significant enterprise data, security becomes an important question. With respect to your business, you also have lots of government or business network security regulatory standards observe.

The safe thing to use over here is MongoDB and if you know your searching and the ways to configure it then it will be the best.

The main thing to refer here is how do people go wrong with MongoDb security?

You can find lots of areas with MongoDB users and security like:

Using the default ports

No immediate authentication enabling.

Providing broader access while using authentication.

For forcing password rotations, not using LDAP.

SSL usage is not forced on the databases.

Dont limit your database access to known network devices.

Five core security areas in MongoDB

Authentication: In your company directory, LDAP Authentication centralizes items.

Authorization: The database offers that the authorization defines role-based access controls using the database provisions.

Encryption: At-Rest and In-Transit, are the broken encryptions. For securing important data encryption is used.

Auditing: Who did what in the database is the ability of auditing.

Governance: Document validation is referred as governance and testing for sensitive data ( like account number, password, Social security number, or birth date).

LDAP Authentication

There are built in user roles for MongoDB and turns off automatically. There are items like password complexity, age based rotations etc and the identification and centralization of user roles versus service functions.

Hopefully LDAP can be used to fill lots gaps. There are lots of connectors to use the Windows Active Directory.

Note: It is available in LDAP support in MongoDB Enterprise. There is no community version. There are other open source versions of MongoDB like Percona Server for MongoDB.

Custom roles

MongoDB has a core called Role based access control (RBAC). In the version of 2.6 MongoDB there are some built in roles available. You can set new limitations as to what can or cannot be accessed Five core security areas in MongoDB by the users.

For more information join the DBA course in pune to make your career in this field.

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8 RULES FOR FAST DATA MANAGEMENT AND ANALYTICS

For building, maintaining, and supporting the current generation there is a need to take proactive measures by the Data managers. A significant piece of the puzzle in maintaining the performance, and here is where drive and database elements converges to real time. Shifting to a fast or streaming data environment is possible by these key elements over here:

1) MIND YOUR STORAGE

Abundance and responsive storage are the essential components of the technology for fast data requirement. Business counterparts and data managers must comprehend the place and time of using data pulsing through their need in organizations to read once and discard or stored for ancient purposes. There are lots of forms of data like constant streams of normal reading from sensors- for archival storage it is simply not enough.

2) CONSIDER ALTERNATIVE DATABASES

Across the enterprise, lots of data is being sought among the enterprise these days in the non-relational variety, unstructured- graphical, video, log data, and so forth. For instance, relational data system are slower than required for the job for installing unstructured data streams. For instance, NoSQL databases have lighter established relational database environments.

3) CLOSE ANALYTICS OF DATA IS EMPLOYED

For data analytic it is useful that are database embedded with solutions of database for many basic queries. Greater response times is enabled by the user versus routing data and queries through networks and dragging centralized algorithms on increase and performance wait times

4) EXAMINE IN_MEMORY OPTIONS

High Intelligence of delivery and interactive experiences need the back end systems and applications perform at the peak. Delivery of data at blazing speeds requires the movement and check out that every nanosecond counts in a user interaction. For supporting entire datasets in the memory and delivering at a high speed memory technology is used.

5) MACHINE LEARNING EMPLOYMENT

An algorithm for employing the techniques behind every analytics driven interaction for gathering data and some pattern matching for measuring preferences or future predicting outcomes.

6) CLOUD LOOKING

There are lots of components required for streaming or fast data in today’s cloud service support in the memory technologies, machine-learning algorithms. In the surveys of OPSclarity 68% of the cite by most respondents utilized hybrid developments as the preferred mechanism for hosting streaming data pipelines.

7) SKILLSBASE BOOST

For fast or streaming data and analytics delivery is needed as the next-generation dawns. The Data professionals require greater familiarity with new tools and frameworks along with Apache Spark or Apache Kafka. The level of training must be increased for current data management staffs along with seek out skills in the market.

8) LOOK AT DATA LIFECYCLE MANAGEMENT

For filtering the data that is required for long term eventual storage versus data that is only useful at the moment. In other words the amount of data needed to store would be overwhelming and unnecessary mostly.

Thus our DBA Course is more than enough for you to make your career in this field.

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Monitoring MongoDB Performance

A favorite database for developers is MongoDB. It offers developers with a NoSQL database option and a database environment that has flexible schema design, automated failover, and an input language with developer-familiarity, namely JSON. NoSQL databases are available in various types. Each item is retrieved using its name (key) and is stored by Key-value. A kind of key-value store with wide column stores uses rows and columns and there is a change in the rows and column values in a table.

Documents are actually data stored by the document-oriented databases offering more structural flexibility when compare to other databases.

A document-oriented database also called as MongoDB is a cross-platform database that has data in documents in a binary-encoded JSON format ( called as binary JSON, or BSON). Both the speed and flexibility of JSON is increased by the binary format and adds lots of data types.

Reason for Monitoring MongoDB

Simple or Complicated environments are there in MongoDB database, distributed or local, on-premises or in the cloud. If you want to make sure about the available database and performance, you need to track and monitor analytics in order to:

  • Current state database determination
  • Data performance review for identifying any abnormal behavior.
  • Some diagnostic data is offered to resolve identified problems
  • Small issues are fixed before they grow into big issues
  • Have a smooth running environment
  • Ongoing availability and success is ensured

Keep your database under observation in a regular and measurable way for ensuring discrepancy spotting, odd behaviors, or issues before they affect the performance. You can quickly spot slowdowns, limiting resources, other aberrant behavior and work for fixing the issues before hitting the consequences of slow websites and applications, lack of data availability or fed up customers.

Thus our DBA Course over here is more than enough for you to make your career in this field.

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TOP 5 NOSQL DATABASES

Gone are the days where one database was used for the entire company. In today’s world even a normal mobile application requires more than one database. Welcome to the golden age of open source NoSQL databases. There are great and readily available open sour technologies with amazing communities behind them at their fingertips. The main thing to consider is which database is right for which use case. There are lots of options available and here are five NoSQL database that developers are familiar with.

1) MONGODB

For supporting JSON format MongoDB is a document oriented database. It is popular among the developers because of its use and easy operation and there is no need for a database administrator (DBA) to bootstrap. For flexible replication and sharding across nodes MongoDB is quite functionally robust. There is a multi-version concurrency control with MongoDB for ensuring consistency in older versions of data available in complex transactions. For scenarios with high loads and Big Data volumes MongoDB has suitable scenarios. Sharding, replication, and data center queries aggregates powerfully with index support and map/reduce functions. It is very easy to use NoSQl database in development phase at an earlier stage and during this phase the schema is not fully established.

2) REDIS

One of the speedy datastores existing today is REDIS. An in-memory, open source, NoSQL database is known for its speed and performance. The community of developers are growing and vibrant in Redis. There are several data types featured implementing lots of functionalities and flows very simple. For delivering top performance, there are various requirements of stored data in RAM, when it comes to speed and performance Redis is considered the winner. If you have an issue with time then this database is the best choice.

3) Cassandra

As a useful hybrid of a column oriented database with a key value store, Cassandra is created at Facebook. The familiar feeling of tables is provided by the grouping families for offering good replication and consistency for good linear scaling. For managing really big volumes of data, Cassandra is most effective in use. A familiar interface is provided and the learning curve is not very steep for users. There are tunable consistency settings in Cassandra.

4) CouchDB

In JSON format over HTTP, CouchDB is accessed. For Web applications this is very simple. It is not jaw dropping that the best suited database for Web with good applications for offine mobile apps is called CouchDB. While choosing a reliable database developers should take an account of CouchDB where every change is stored on disk like a document revision therefore the main point addressed over here is redundancy and conflict resolution. A strong replication is boasted by CouchDB model that for allowing filtered replication streams.

5) HBase

In Hadoop there is a powerful database considered and the Hbase spreads among nodes using HDFS. It is very appropriate to use for handling huge tables comprising of billions of rows. Big Table model is followed by both Hbase and Cassandra. For linear scaling Hbase is sued for simply adding multiple nodes to the setup. For real-time querying of Big Data Hbase is best suited. For more information join the DBA course to make your career in this field as a DBA professional.

Fore more information join the DBA institute of training for becoming a DBA Professional in this field successful.

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How Cosmos DB Handles Data Consistency

Cosmos DB users with limited percentage will use this approach for data consistency in the real world. Advantages of three alternative consistency models will be used instead. Turing Award Winner Leslie Lamport is based on the work. Thereby creating a database for managing the real life situations were the foundations and they deliver shared applications without the traditional consistency model penalties. Staleness is bounded by the first alternative consistency model that offer a point that there is a sync between reads and writes. There is no guarantee before it but after it the latest version is always accessed by you. Either a number of versions or time interval you will define the boundary.

Everything is consistent outside the boundary and within it there is no surety of a read returning latest data. An element of strong consistency is a store while offering you low latency and the choice of global sharing and higher reliability.

If you want to be sure of all the consistent reads then you can use this model. The writes are also considered to be fast. If you read it in the region that is written then you can get the data that is correct.

Session consistency, second alternative consistency model, works well when there is a read and write drives from a client app. The own writes of a client can be read by them, and across the rest of the network the data replication takes place. You have low latency of data access with this way and you know that you will fail over over a period of time and in any Azure region your application will run.

A third alternative consistency model with prefix of consistency in Cosmos DB has been added by Microsoft. The eventual consistency’ speed has added predictability with Consistency prefix. The latest write might not be seen by you when you read the data but your reads will never be out of order.

It is both fast and predictable useful feature. Your client will be able to see after Write A, then B, and then C, only A or A and B but never A and C.

The Cosmos DB regions will mix on A, B, and C, offering you reliability and speed. From the competition it is a very different beast when Cosmos DB is concerned. There are some NoSQl offers from the limited form of shared access, but they target at redundancy offers and recovery from disasters.

There are similar features offered by the Google spanner but is possible only datacenters in a single region. If your target audience is only US or EU then you might be fine with the work but for a global reach there are more cloud services.

Strong consistency in low latency is a good option but has less value when data replication that is cross-regional becomes a major bottleneck.

CosmosDB relies on applications and that is what your type of consistency choice is all about. Is your target about reading or writing the data? Usage of data? There are advantages and disadvantages of each consistency model and you need to take into account before choice preferences carefully.

A good place to start, session consistency for most app-centric data. It is good to test with various choices when you dont require immediate access of data globally.

For more information join the DBA Course to make your career in this field.

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