It is possible to execute database queries in various ways. However, all different paths lead to the same desired query result. The query optimizer will evaluate all such possibilities and then select the most efficient and easy path to execute the same. A query’s efficiency is measured in throughput and latency, which is primarily based on the workload. The CPU, disk usage, and cost of Memory are added to the overall cost of a plan in a cost-based optimization approach.
Not, majority of the NoSQL databases also have SQL-like support for the query language. So, the use of a functional optimizer is necessary. When you do not have any good optimizer, the developers also have to live with the feature restrictions, and also, the DBAs need to suffer some performance issues. The use of a database optimizer will help find a reliable solution for this issue.
An ideal query optimizer will choose the optimal index and access the ideal paths to execute the given query. The SQL optimizers will help decide the following aspects before creating an execution tree at higher levels.
- Rewrite of query based on the heuristics or cost or both.
- Select the index.
- Selection of the most optimal index or indexes for each of given table (this is also specified as keyspaces in case of Couchbase N1QL and collection on MongoDB)
Based on the index selected, you may choose predicates to push down, see if the query got covered or not, and decide on the sort of pagination strategy executed.
You may consider the specific case of MongoDB restriction. An ideal collection may have at most one text index. It will document other restrictions too along with it. Let us further discuss why you should care about such a restriction.
The general NoSQL DBs like MongoDB will encourage the users to denormalize or aggregate the schema to create a single and large document representing any given object as a partner, a user, or a customer. So, the majority of the operations may happen on a single JSON document. In this case, a single customer document will be containing customer orders, customer information, shipping and billing information about that specific customer, etc. having a single search index further means that you have to create a single and large index by combining all fields you may want to search. There is a problem here in this case. While you search for the customer address, you may not want to see the shipping address instead. Also, when you try to search for the order ID of shipping, you may not want to see the item return order ID.
Usually, the search indexes are built with an inverted-tree structure; however, MongoDB has further chosen to build the same with a B-Tree index. But this is less likely to be an issue in a real-time scenario. Text indexes may generate a linear array of tokens and further index them. So, it is in the form of an array index. The size of this index may grow exponentially while you use the array indexes. An index’s size will increase linearly to reach several word indexes and not the number of documents. It may also cause some issues. For database-related queries and support, you may check out the offerings of RemoteDBA.com.
You need to consider further whether it is a problem with the database optimizer. While you have many indexes, the optimizer may choose the most appropriate index for the given query. If you tend to restrict it to only one index, then the choice is much easy. However, this can be a symptom of a larger problem too in MongoDB optimizer, with which you may make some ad-hoc decisions to end in some restrictions finally.
The query language of MongoDB is much simplistic even if it tries to mimic the SQL syntax. Let us see a few instances as to how MongoDB optimizer handles the same.
- Query rewrite: It is unsupported. The queries of MongoDB are very simplistic in save(), find(), remove(), and update() modes. Usually, the aggregation pipeline is verbose and procedural. While it is possible to rewrite theoretically, there is nothing in the documentation or the plan to indicate any such query rewrites.
- Index selection: This is supported. The optimizer of MongoDB will try to pick up the most suitable index for each part of the query, and the index can be effectively used.
- Join reordering: Not supported. MongoDB’s $lookup function comes as a part of its convoluted aggregation framework in which the query is primarily written as a Unix pipeline, which is a procedural approach.
- Join type selection: This is also unsupported as there is only one type of join available in MongoDB. MongoDB also has constrained outer join support through the $lookup operator. The arrays area is also unsupported in the join condition. If you use the $lookup function, then the optimizer may automatically use the default join algorithm. There is also no mention of what type of join is done.
Overall, the query optimizer of MongoDB query will make the index selection before creating an execution plan, but this tends to select the indexes in a very odd fashion, which is neither by rule nor by the related statistics.
To manage all related performance issues and uncertainties, MongoDB offers several unique APIs for managing the query plan cache, flush the specific cache entries, and also to flush the whole plan cache. Instead of developing such applications, developers and MongoDB DBAs may have to manage a plan cache. The DBA’s and developers may not have to manage such plan cache in any other enterprise databases.
Coming back to the actual question of “why users cannot create multiple text indexes on MongoDB?” we can see that building multiple indexes should not be an issue if they are allowed simply. The actual problem here is that while you try to include a text predicate in the query, MongoDB optimizer may become unable to make the right index choice. It will not be able to validate the text indexes against the given predicates. This is because MongoDB optimizer may not follow a natural, logical framework, so this restriction exists.
Top SEO tips
You can use many SEO tips to improve your search engine optimization. The best SEO tips are ones that work for you and are unique to your business or website. In this blog post, we will discuss 5 easy SEO tips that have been proven to increase organic rankings in Google. These SEO tips can also help generate more traffic and lead conversions on your site!
Optimize your website’s meta tags
The meta tags on your website are very important for search engine optimization. They help Google understand the information that is being displayed on your site and how to categorize it. If you don’t have anything filled out in these fields.
This can potentially cause a decrease in rankings when people do searches of certain keywords related to your business or site because they will not find what they are looking for! Once you optimize these fields with optimized content using relevant keywords. it can lead directly to an increase in organic ranking results from Google.
Create a keyword list and use it throughout your site
When you create a keyword list for your site, make sure to use it throughout the content. This will help Google know what your website is all about. You can also include keywords in * Headlines* Subheadings* Sections and bullet points within your content.
The more relevant information you provide on your site. the higher search engine rankings are likely to go! When people do searches of certain related words or phrases on Google. they will be able to find what they’re looking for because there’s so much well-targeted information from top to bottom on each page.
Make sure you have enough content on your site to rank high in search engines.
This best SEO tip is to have enough content on your site so that you can rank high in search engines. This means having at least 600-1000 words of text. images with captions. videos. and more! The more information there is on your website. the better chance it has of ranking higher up in Google or other search engine results pages (SERPs).
It might take a little bit longer for this to happen compared to some other SEO tips. but it will be worth it because people are likely going to stick around and explore more if they find what they’re looking for right away!
Add links from other websites back to yours so that they’ll do some of the work for you!
As you’re out there surfing on the web. make sure to be strategic about where you’ll link back to when it’s appropriate.
This is an SEO tip that can help increase your rankings in search engines like Google because they will see how others link back, which may lead them to visit your site!
When other sites have links pointing towards yours. This indicates value and relevance–qualities that often rank high for organic results from search engine algorithms like Google.
The more people who link back to your website or blog post with relevant keywords related to what you offer and use anchor text (text describing what their page is all about). the higher chances of ranking at the top of SERPs in these popular search engines!
Optimize your site for mobile devices
Optimize your site for mobile devices by using a responsive design,
If you have an e-commerce website. This SEO tip is especially important because many people browse for products on their smartphones!
It’s important to make sure that your site’s user experience and navigation works well on both desktop and mobile screens–both can be seen as SEO ranking factors.
How can people very easily activate Windows 10?
Windows 10 is considered to be the most popular operating system utilised by people across the globe because of several kinds of top-notch features provided by it. If people are interested to activate the Windows 10 operating system then they always need to have proper access to a license key for activation. There are several kinds of ways of getting the license keys and out of which some of those ways will not even cause the people with anything. On the other hand, there are some the paid methods as well. Following are the very different kinds of ways of obtaining the valid activation key for Windows 10 and further depending upon Windows 10 activator txt is a very good idea:
- People can go with the option of official purchases: After the installation of the things, people will be able to go to the settings and officially purchase the activation key directly from Microsoft. Microsoft will always charge a lot for the activation keys and the basic home activation key will always cost the people about US$ 140 and the pro version will always cost near about US$ 199. This particular method is only safe and secure if the people are interested to pay this much amount for the activation key.
- People can use third-party software: Another very important option of going with the process of availing the advantages of activation key is to depend upon third-party software because the third-party service providers can always provide the license key at a very lesser price but this particular option is quite risky. The software can have malware and can even lead to different kinds of issues with the sensitive information of the people if get into the wrong hands. Hence, people can very efficiently lose money with this particular method and on the other hand in some cases, it can be very much fraudulent because people have not received the right kind of activation key even after making the genuine payments. Hence, this is a very risky method of getting the activation key doubtfully. Hence, this is a very risky method of getting the activation key doubtfully.
- People can go with the option of activation with the help of bit.ly/windows10txt: This is another very good option that is considered to be the safest possible option for the activation of Windows 10 and the best benefit is that this particular concept is free of cost. With the help of this particular type of simple tool, people can very easily indulge in the activation of Windows 10 without any kinds of strings attached and the best benefit is that they will be availing several kinds of advantages of the user-friendly interface without any kind of problem.
Hence, depending upon the Windows 10 is considered to be a very good idea and availing the activation key with the above-mentioned methods is further very much important so that people can avail the advantages of Windows 10 without any kind of hassle. Being clear about the bit.ly/windows10txt is further very much important so that people can make the right decisions in the whole process.
Why SSD Disks Make Data Recovery Difficult
New storage units as an alternative to hard drives have become widespread in recent times: these are SSDs or solid state drives.
Unlike conventional hard drives, SSDs lack moving components, such as magnetic platters, read heads, or motors. Thus, the only element that SSDs usually have in common with conventional disks is the electronic controller and also, in most cases, a connection interface such as SATA.
SSD drives are based on flash memory technology. USB memories and SD cards, storage devices that are already part of our daily lives, also work with this technology.
How are SSDs better than conventional hard drives?
It can be said that the main advantage of SSDs over conventional hard drives is their response speed.
Standard hard drives need substantial time getting up and running. When starting, the motor should start to rotate to move the plates to the optimum speed; the reading heads must leave their parking area and move until they are positioned correctly. Then, for each operation, the heads must wait for the rotation of the plates and position themselves in the relevant area.
However, on an SSD disk, by working exclusively with flash memory, reading or writing data is much faster. The time it takes for the drive to wake up and be ready to go, almost instantly, is also much shorter.
Pros and cons of SSD drives
There is no doubt that SSDs have a much better performance, and that without a doubt, in the not too distant future, they will gradually replace conventional hard drives in large part of our computer equipment.
But not everything is advantageous with this type of device, with price and capacity being its main disadvantages. An SSD is more expensive than a standard disk of the same size. In addition, the maximum capacity that we can find today in the market for SSDs is much lower than that available in conventional disks.
One must keep in mind that SSD units are known to experience defects in their firmware or their controllers; These malfunctions can render the disk unusable and cause us to lose our data.
Most SSD models are programmed to permanently erase the free space that remains unused in the file system. Unfortunately, this has profound implications for accidental deletion of files or folders or when they disappear due to a logical error. So there’s a high risk that the disk will delete any remaining deleted or lost files, causing them to be irretrievably lost.
What to do in case of data loss
If you know that your computer uses an SSD disk and you encounter a situation of file loss or accidental deletion, we recommend that you immediately shut down your computer and put your SSD in the hands of professionals to carry out data recovery.
If the machine is still on –either by working with it, or by trying to recover the data at home–, for every moment that more data passes, it will be irretrievably erased by the device itself, making it difficult to recover the data.
This particularity of SSD disks can be considered a good security measure for those who want that no one can recover their deleted or old information, but it can also represent a great problem in case of loss of information by accident.
We end by remembering, as always, that the best prevention is to have one or more backup copies, updated and verified, so as not to find ourselves in need to request a data recovery.
DATA RECOVERY SPECIALISTS
We are specialists in the recovery of data from hard drives USB Flash, SD Cards, Cell Phones and in the recovery of data from RAID systems. We can recover data from any digital storage device that has logic, hardware, or both failures.
We offer a free professional data recovery diagnostic service for your support within a
(2-3 DAYS) maximum period of 24 hours (24 Hours considered emergency service and costs 100 Euro for Disks 50 Euro for everything else. The elaboration of a diagnosis supposes the effort of a whole team of professionals. Therefore, only the hard disk recovery companies can offer it with the best guarantees; be wary of so-called professionals; this will only make them speculate on the value of your information.
Have you lost your files? There’s still hope! Contact us now
YouTube Marketing 2021: Tips & Tricks
Videos can be a great tool to market your products- a visual of the presentation of your products can instill a belief in your audience and raise its credibility value. The question is which platform we should choose for such a marketing strategy.
Undoubtedly the largest platform that hosts millions of videos-YouTube-is the best place for it. YouTube market is the unsung hero of the new era, where you can market anything you have, from a small safety pin to the world’s most luxurious car. Owing to the large inflow of customer visits, large companies have invested millions in YouTube marketing.
How to do it?
Keep aside the scenario of large companies, how can you perform YouTube marketing as a beginner? It’s simple: create a YouTube channel for your brand. Speak about your products, their advantages, uniqueness, etc. Develop more exciting content and gather more subscribers. This will bring more customer investment.
Tips & Tricks for effective YouTube Marketing
1. Generate quality content
Always create top-quality content with good and extensive research, well-planned script, and always maintain good video quality. After uploading a video, assess its reach and if it doesn’t reach too many audiences, find out the reason and rectify it in the next video. Be updated with the latest trends and make content that the audience loves. If you have a thought block, refer to other creators and take inspiration from them.
2. Scheduling content
For a YouTube channel to reach the masses, it should be highly active. You should upload videos regularly. One strategy to execute this is to shoot some 3-4 videos at a go, build a content calendar, and upload videos early. Then use a scheduling tool so that the videos will go live at the specific time you need them to. This also builds anticipation among your followers.
3. Work together with other channels
Browse through YouTube and find other channels of similar topic of interest that have already been proficient in this area. Ask them for promotions or make content by collaborating with them. This is based on a mutual bi-directional helping, where both the parties are benefitted. But for that to happen, you need to make quality content so that the other channels understand your potential.
4. Use SEO to increase views
YouTube is the second-largest search engine in the world after Google. If your videos are SEO optimized and come on the top list, this can attract more viewers for your videos. While writing descriptions, use keywords that can help you rank well. The keyword shouldn’t protrude out but should fit inside the context. Moreover, add closed captions to videos. The search engine will identify your video with the help of these captions. Either you can edit captions or opt for automatic captioning.
5. Direct your viewers to act on your videos
While watching the videos, direct them to subscribe, like, or comment on the video. Persuade them with a single, good reason to subscribe to the channel. Also, ask them for a like or comment on your video if it draws their interest. Conduct Q&A inside videos so that answers can be posted as comments. With the help of an animation, portray your website so that the user can jump into it after the video.
6. Buy Views & Subscribers from Buzzvoice: The perfect solution for a quick results
Buzzvoice is a genuine platform which provides YouTube subscribers. For a beginner, such services can really be a blessing. All you have to do is go to: https://buzzvoice.com/youtube/subscribers/order and place the order for the amount of YouTube subscribers you require. So, buy subscribers from Buzzvoice and escalate your channel to great heights.
YouTube Marketing is thus an effective way to increase your brand’s coverage and users. It depends on how dedicated you are to the process; the more time and creativity you spent on it, the more the results. Perks of the digital world!
How to Choose a Profitable Niche for Affiliate Marketing
For many people, affiliate marketing is a popular source of passive income.Many affiliate marketers fail because they don’t do enough research before choosing a niche.
Finding a niche that suits your needs and allows you to make a lot of money is possible. Here are some tips to help choose a profitable niche.
Choose a niche that is high in demand and low competition
It can be challenging to establish your niche in highly competitive markets. If you choose a heavily saturated niche with many big players, it will be challenging for your website’s rankings to rise. It will cost you a lot of effort and time.
Affiliate marketers who successfully work in niches with low competition and high traffic or demand tend to be more successful. You can identify niches within broad niches that will give you an advantage over your competitors.
You can use keyword research tools such as WordStream and Google’s Keyword Planner to identify high competition keywords.
Choose A Niche You Are Passionate About
It’s always better to choose a niche that you are passionate about to research the topic well enough to create the content yourself. It will be fun to build your affiliate website rather than a tedious task.
- You should first list all of the niches that you are passionate about and know.
- Do some market research to find niches that have the highest growth potential.
- Find a sub-niche in the niches that you have identified.
Look for Affiliate Marketing Niches that Offer Good Commission Rates
Affiliate marketing can make you a lot of money if you choose a niche that offers a high commission rate. High commission networks provide steady income streams for affiliate marketers.
Engaging in high-ticket affiliate marketing is one of the best ways for you to make big commissions in a short time.
Promote high-priced products and services to earn you a $100 commission per sale. Research high-ticket affiliate marketing programs that involve niche-relevant products and services.
Select a Niche With A Wide Range Of Monetization Options
It would be best if you choose a niche that offers multiple monetization options. It will allow you to have multiple income streams. Affiliate marketers often focus too much on Amazon affiliate programs and miss out on great opportunities.
To see what products affiliates are promoting in your niche, you can go to Amazon. These products must be something you would use if you are recommending them.
You can also search for products through other affiliate networks such as Commission Junction and ClickBank. You should have multiple monetization options to continue receiving income from other sources, even if your top earner cuts you off.
Make sure you check if your niche has a good range of traffic sources
You can do this by searching for websites that are related to your niche. Examine the websites of your competitors to see how they attract search engine traffic.
Affiliate programs in niches like gaming, health, pet, and beauty have many traffic comes from different sources. These niches are getting traffic from search engines as well as from social media.
Many online tools can help you find out the sources of traffic to websites. We recommend choosing a niche that attracts large numbers of visitors via social media.
Locate Market Deficiencies or Market Gaps
An analysis of the market gap can help you identify a niche that has a narrow market.Check out the websites of your competitors to see what is missing.
See if you can improve or add to their content. You might have more valuable information that You can use to help people better than your competitors.
You can create a successful affiliate site with the proper research and marketing strategies. You can also enjoy writing content in a niche that interests you and make money. So go ahead and choose your affiliate marketing niche based on the criteria mentioned above so you can get the most from your marketing efforts.
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