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Node JS Is single threaded asynchronous non-blocking javascript runtime, but its not always single threaded there are occasions where nodejs uses multi-threading, so the questions we will try to answer in this video, when is nodejs single threaded and when does it use multi-threading and how will that affect my app?
Examples 8:00
Cluster Nodejs 16:00
Resources
https://nodejs.org/en/docs/guides/don…
http://docs.libuv.org/en/v1.x/index.html
Subscribe: https://www.youtube.com/channel/UC_ML5xP23TOWKUcc-oAE_Eg
#node #nodejs #javascript
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DISCLAIMER: This is not an official google project, this is just something I wrote while at Google.
Pyringe
Pyringe is a python debugger capable of attaching to running processes, inspecting their state and even of injecting python code into them while they're running. With pyringe, you can list threads, get tracebacks, inspect locals/globals/builtins of running functions, all without having to prepare your program for it.
A "Google project". It's my internship project that got open-sourced. Sorry for the confusion.
Pyringe internally uses gdb to do a lot of its heavy lifting, so you will need a fairly recent build of gdb (version 7.4 onwards, and only if gdb was configured with --with-python
). You will also need the symbols for whatever build of python you're running.
On Fedora, the package you're looking for is python-debuginfo
, on Debian it's called python2.7-dbg
(adjust according to version). Arch Linux users: see issue #5, Ubuntu users can only debug the python-dbg
binary (see issue #19).
Having Colorama will get you output in boldface, but it's optional.
Get it from the Github repo, PyPI, or via pip (pip install pyringe
).
Short answer: No, sorry. Long answer:
There's three potentially different versions of python in play here:
libpythonXX.so
your build of gdb was linked against2
Is currently the dealbreaker here. Cpython has changed a bit in the meantime[1], and making all features work while debugging python3 will have to take a back seat for now until the more glaring issues have been taken care of.
As for 1
and 3
, the 2to3
tool may be able to handle it automatically. But then, as long as 2
hasn't been taken care of, this isn't really a use case in the first place.
[1] - For example, pendingbusy
(which is used for injection) has been renamed to busy
and been given a function-local scope, making it harder to interact with via gdb.
Unfortunately, no. Since this makes use of some CPython internals and implementation details, only CPython is supported. If you don't know what PyPy or CPython are, you'll probably be fine.
PDB is great. Use it where applicable! But sometimes it isn't.
Like when python itself crashes, gets stuck in some C extension, or you want to inspect data without stopping a program. In such cases, PDB (and all other debuggers that run within the interpreter itself) are next to useless, and without pyringe you'd be left with having to debug using print
statements. Pyringe is just quite convenient in these cases.
This is a known limitation. Things like inject('var = 2')
won't work, but inject('var[1] = 1337')
should. This is because most of the time, python internally uses a fast path for looking up local variables that doesn't actually perform the dictionary lookup in locals()
. In general, code you inject into processes with pyringe is very different from a normal python function call.
You can start the debugger by executing python -m pyringe
. Alternatively:
import pyringe
pyringe.interact()
If that reminds you of the code module, good; this is intentional.
After starting the debugger, you'll be greeted by what behaves almost like a regular python REPL.
Try the following:
==> pid:[None] #threads:[0] current thread:[None]
>>> help()
Available commands:
attach: Attach to the process with the given pid.
bt: Get a backtrace of the current position.
[...]
==> pid:[None] #threads:[0] current thread:[None]
>>> attach(12679)
==> pid:[12679] #threads:[11] current thread:[140108099462912]
>>> threads()
[140108099462912, 140108107855616, 140108116248323, 140108124641024, 140108133033728, 140108224739072, 140108233131776, 140108141426432, 140108241524480, 140108249917184, 140108269324032]
The IDs you see here correspond to what threading.current_thread().ident
would tell you.
All debugger functions are just regular python functions that have been exposed to the REPL, so you can do things like the following.
==> pid:[12679] #threads:[11] current thread:[140108099462912]
>>> for tid in threads():
... if not tid % 10:
... thread(tid)
... bt()
...
Traceback (most recent call last):
File "/usr/lib/python2.7/threading.py", line 524, in __bootstrap
self.__bootstrap_inner()
File "/usr/lib/python2.7/threading.py", line 551, in __bootstrap_inner
self.run()
File "/usr/lib/python2.7/threading.py", line 504, in run
self.__target(*self.__args, **self.__kwargs)
File "./test.py", line 46, in Idle
Thread_2_Func(1)
File "./test.py", line 40, in Wait
time.sleep(n)
==> pid:[12679] #threads:[11] current thread:[140108241524480]
>>>
You can access the inferior's locals and inspect them like so:
==> pid:[12679] #threads:[11] current thread:[140108241524480]
>>> inflocals()
{'a': <proxy of A object at remote 0x1d9b290>, 'LOL': 'success!', 'b': <proxy of B object at remote 0x1d988c0>, 'n': 1}
==> pid:[12679] #threads:[11] current thread:[140108241524480]
>>> p('a')
<proxy of A object at remote 0x1d9b290>
==> pid:[12679] #threads:[11] current thread:[140108241524480]
>>> p('a').attr
'Some_magic_string'
==> pid:[12679] #threads:[11] current thread:[140108241524480]
>>>
And sure enough, the definition of a
's class reads:
class Example(object):
cl_attr = False
def __init__(self):
self.attr = 'Some_magic_string'
There's limits to how far this proxying of objects goes, and everything that isn't trivial data will show up as strings (like '<function at remote 0x1d957d0>'
).
You can inject python code into running programs. Of course, there are caveats but... see for yourself:
==> pid:[12679] #threads:[11] current thread:[140108241524480]
>>> inject('import threading')
==> pid:[12679] #threads:[11] current thread:[140108241524480]
>>> inject('print threading.current_thread().ident')
==> pid:[12679] #threads:[11] current thread:[140108241524480]
>>>
The output of my program in this case reads:
140108241524480
If you need additional pointers, just try using python's help (pyhelp()
in the debugger) on debugger commands.
Author: google
Source Code: https://github.com/google/pyringe
License: Apache-2.0 License
1594162500
A multi-cloud approach is nothing but leveraging two or more cloud platforms for meeting the various business requirements of an enterprise. The multi-cloud IT environment incorporates different clouds from multiple vendors and negates the dependence on a single public cloud service provider. Thus enterprises can choose specific services from multiple public clouds and reap the benefits of each.
Given its affordability and agility, most enterprises opt for a multi-cloud approach in cloud computing now. A 2018 survey on the public cloud services market points out that 81% of the respondents use services from two or more providers. Subsequently, the cloud computing services market has reported incredible growth in recent times. The worldwide public cloud services market is all set to reach $500 billion in the next four years, according to IDC.
By choosing multi-cloud solutions strategically, enterprises can optimize the benefits of cloud computing and aim for some key competitive advantages. They can avoid the lengthy and cumbersome processes involved in buying, installing and testing high-priced systems. The IaaS and PaaS solutions have become a windfall for the enterprise’s budget as it does not incur huge up-front capital expenditure.
However, cost optimization is still a challenge while facilitating a multi-cloud environment and a large number of enterprises end up overpaying with or without realizing it. The below-mentioned tips would help you ensure the money is spent wisely on cloud computing services.
Most organizations tend to get wrong with simple things which turn out to be the root cause for needless spending and resource wastage. The first step to cost optimization in your cloud strategy is to identify underutilized resources that you have been paying for.
Enterprises often continue to pay for resources that have been purchased earlier but are no longer useful. Identifying such unused and unattached resources and deactivating it on a regular basis brings you one step closer to cost optimization. If needed, you can deploy automated cloud management tools that are largely helpful in providing the analytics needed to optimize the cloud spending and cut costs on an ongoing basis.
Another key cost optimization strategy is to identify the idle computing instances and consolidate them into fewer instances. An idle computing instance may require a CPU utilization level of 1-5%, but you may be billed by the service provider for 100% for the same instance.
Every enterprise will have such non-production instances that constitute unnecessary storage space and lead to overpaying. Re-evaluating your resource allocations regularly and removing unnecessary storage may help you save money significantly. Resource allocation is not only a matter of CPU and memory but also it is linked to the storage, network, and various other factors.
The key to efficient cost reduction in cloud computing technology lies in proactive monitoring. A comprehensive view of the cloud usage helps enterprises to monitor and minimize unnecessary spending. You can make use of various mechanisms for monitoring computing demand.
For instance, you can use a heatmap to understand the highs and lows in computing visually. This heat map indicates the start and stop times which in turn lead to reduced costs. You can also deploy automated tools that help organizations to schedule instances to start and stop. By following a heatmap, you can understand whether it is safe to shut down servers on holidays or weekends.
#cloud computing services #all #hybrid cloud #cloud #multi-cloud strategy #cloud spend #multi-cloud spending #multi cloud adoption #why multi cloud #multi cloud trends #multi cloud companies #multi cloud research #multi cloud market
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Looking to build dynamic, extensively featured, and full-fledged web applications?
Hire NodeJs Developer to create a real-time, faster, and scalable application to accelerate your business. At HourlyDeveloper.io, we have a team of expert Node.JS developers, who have experience in working with Bootstrap, HTML5, & CSS, and also hold the knowledge of the most advanced frameworks and platforms.
Contact our experts: https://bit.ly/3hUdppS
#hire nodejs developer #nodejs developer #nodejs development company #nodejs development services #nodejs development #nodejs
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Great evolution has happened in the buying and selling process due to the advent of ecommerce. There is exponential growth in the field of online business and selling and buying happens at the doorstep. The multi seller ecommerce platform has become the next level in the ecommerce niche.
The ecommerce marketplace platforms like Amazon, Flipkart, and eBay have already succeeded in the industry and have set a milestone on sales and revenue.
This fact has inspired many aspiring entrepreneurs and has made them transfer their brick and mortar stores to multi vendor platform.
Multi vendor marketplace platform is connect a multiple sellere or vendors to display and sell their products through the platform by agreeing with the terms mentioned by the admin of the platform. They can have their way of promoting their products.
Now that you have a better understanding of the key features for Multi vendor marketplace, let’s compare ten of the top Multi vendor providers.
Zielcommerce is a white label enabled enterprise grade online marketplace software. The multi vendor platform comes with a one time payment option and it is completely customizable and also scalable.
Platform Highlights
Zielcommerce provides its users with a secured environment through its SSL certified marketplace software and gains the trust of the users. You can be easily promoted online with this SEO-optimized platform. Stay connected with your customers all the time with the in-build communication channels.
The pleasing features of this multi vendor marketplacce solution
Best Use Cases
Client’s Rating
Explore Zielcommerce Multi vendor Ecommerce Platform
X-cart is a standalone online marketplace solution for your online business needs. You can get the complete comprehensive features within this multi vendor marketplace software that can meet the customers’ expectations. A genuine approach is maintained and the users trust X-cart for its outstanding functionalities that satisfy the multi vendor market demands.
Platform Highlights
It has gained the trust of thousands of users and people who use Xcart as their online multi vendor marketplace software has given the best review about the product.
The salient features of this multi vendor ecommerce platform solution
Best Use Cases
Client’s Rating:
Explore Xcart Multi vendor Marketplace Software
CS-Cart has never disappointed its users and it comes with the complete ecommerce marketplace solution for all your business demands. You can gain perfect control over the online multi vendor marketplace platform and can personalize the platform to suit your business needs. You will get higher visibility and can easily attract your target audience with the CS-Cart marketplace solution.
Platform Highlights
You can gain the attention of global audiences through its multilingual support and can take your brand all over the world and build a strong branding with the help of CS cart.
The key features of this multi vendor ecommerce website solution
Best use cases
Client’s Rating :
[Explore Cscart Online Marketplace Software](https://www.cs-cart.com “Explore Cscart Online Marketplace Software”)
Arcadier is the SaaS (Software-as-a-Service) provider that allows businesses, SMEs, local communities, government agencies and entrepreneurs to manage their online multi vendor marketplace platform more efficiently and affectionately. Arcadier has many attractive features that can grab the attention of vendors.
Platform Highlights
Apart from other SaaS online marketplace platforms on the market that offer a temporary solution for all purposes, Arcadier allows users to choose between multiple options in buying and selling products or services to rental spaces and other business models.
**The Prominent features of this online multi vendor marketplace software solution
Best Use Case
**Client’s Rating: **
Explore Arcadier Multi vendor Marketplace Platform
Multi vendor Marketplace that converts your single admin online store into Multi vendor Marketplace. It provides of adding vendors and maintain the track record of their order and sales. Apart from vendor features, Bigcommerce gives best buyer features that will impress buyers and make them decide on buying products in your online multi vendor ecommerce platform.
Platform Highlights
It comes with an option which, without the approval of the vendor admin the product would not be visible in the forefront. This online multi vendor marketplace platform is excellent features and creating various plans for vendors, a payment management system for vendors.
Impressing features of this online multi vendor marketplace software solution
Best Use Case
Explore Bigcommerce Multi vendor Ecommerce Platform
Ixxo is an ideal marketplace solution for those who want to open and manage a high-volume marketplace as IXXO online Multi Vendor ecommerce platform offers unlimited product and unlimited vendor capacity. The marketplace owners can configure vendor privileges purely based on vendors. this help the multi vendor marketplace software owner to provide the basic vendor features, where the vendors dont have much ecommerce experience and privileges.
Platform Highlights
This will ensure that the delivery is taking place in the right way. If there is any delay then through a proper messaging system the buyer will get intimation regarding the delay. This feature impresses the customer and makes the platform the best one.
Splendid features of this best ecommerce marketplace platform solution
Best Use Cases
**Client’s Rating: **
Explore IXXO cart Online best marketplace softwarebest marketplace software
Sharetribe is one of the excellent SaaS platforms for building and launching a online multi vendor marketplace software. Easy setting changes to your color theme and photos, instantly.
Platform Highlights
This online multi vendor marketplace platform gives a perfect shopping experience to customers and also satisfied selling experience to vendors. Users can trust sharetribe for their business requirement and can get a trustworthy marketplace solution that will leverage their business to greater levels.
Core features of this best ecommerce marketplace platform
Best Use Cases
**Client’s Rating:**
Explore Sharetribe Multi vendor Marketplace Software
A online Multi vendor marketplace platform is an online marketplace where many sellers can sign up, create their profiles and add products and sell when they want. One of the best examples of multi vendor platforms right now is Amazon, and so on. Well, the ecommerce marketplace software has multiple benefits for its users and vendors.
Platform Highlights
Impressing feature of this best ecommerce marketplace platform
Best Use Cases
Is a flexible multi seller ecommerce platform that can be easily modified as their business evolves with more conversions rate, better integrations, with complete solutions for all aspects of online sales, This online multi vendor marketplace software help them generate revenue and increasing the average order value and with less operating costs.
Platform Highlights
Miva suits to any business model and business size. This online multi vendor marketplace platform is very cost-effective and even a startup who plans to start an online store with minimum investment can easily go for Miva.
The online ecommerce marketplace software looks like it has been built from scratch. It inherits all essential features that are needed to run a multi vendor marketplace platform successfully. All you need is to buy the platform and launch the marketplace and can start earning instantly.
Intuitive feature of this best marketplace software
Best Use Cases
**Client’s Rating: **
Quick eSelling is a popular multi vendor online marketplace platform with upgrade features and a more comfortable platform for global merchants and seller to start their own online store. Quick eSelling is an online store feature for Customer Engagement and Retention. This platform has been designed to help you significantly increase your sales and save time.
Platform Highlights
his will satisfy vendors and will make them stay with your best multi vendor marketplace software for a long time. You can get complete support from the technical team round the clock. Whenever customization needed the technical team will guide you in designing your own online multi seller ecommerce platform.
The essential feature of this Multi vendor marketplace software
Best Use Cases
Client’s Rating:
This is the most recommended online marketplace platform that holds thousands of active users. The advanced security feature supports users to store customers’ data in a secured way. The platform can stand against all malware attacks as it contains SSL certification.
Platform highlights
The extraordinary inventory management system will let sellers maintain their stock in an effective way. The order process will never be interrupted due to a shortage of stock. Proper notifications will be sent to respective sellers whenever their stock hits the minimum value.
This multi vendor software supports thousands of templates and plugins that can be used by users to customize their marketplace to meet their business demands. Being a user-friendly marketplace platform, no technical knowledge is needed to manage the platform. The dedicated dashboard will support the admin to know the exact working condition of their business.
Features of this multi vendor ecommerce marketplace platform.
Best use cases
Client’s Rating:
Smartstore Z is the most compatible multi vendor eCommerce store that will fit into any business model and business size.
5. Brainview – a commendable online marketplace platform
Brainview has the most enchanting UI & UX that can gain the attention of your target audience and will make them buy products on your platform. Users can get globally connected as the marketplace supports multiple languages and multiple currencies. Advanced technologies are implemented just to provide a seamless shopping experience to customers.
Platform highlights
Excellent customer support is offered by this multi vendor platform and customers can have direct communication with the concerned seller and they can get more details about the product or service before they buy. This will reduce returns and refunds. Many customer-attracting features are available in this marketplace platform like loyalty programs, referral programs, and many more.
Acquiring more customers is not at all a challenge for this best multi vendor marketplace software. Several revenue streams like commission fee, subscription fee, affiliate modules, advertisements, and many more are integrated with this online marketplace platform.
Features of this multi vendor eCommerce platform
Best use cases
Client’s Rating:
· Ease of use: 4/5
· Customer service – 4.2/5
· Overall: 4.1/5
Brainview is the significant multi vendor eCommerce store that give 100% customization and scalability to users.
There are several types of multi vendor marketplace software in the market. One needs to understand all the types and should know to identify which type of marketplace platform suits his business well.
The million-dollar question that has arisen in the minds of every budding entrepreneur is how to start a online multi vendor ecommerce platform. Full attention is needed while building a ecommerce marketplace software. It is not as simple as you think. Only through this multi vendor ecommerce platform, you are going to be recognized by the vendors and the buyers. This multi vendor platform is going to earn you money so it cannot have any flaws.
One way of building a online multi vendor marketplace software is to build it from scratch. First, you need to hire a reputed multi vendor ecommerce platform development company that has ample knowledge about this field. Then you need to explain to them about your requirements and expectations.
They will develop and will show you the demo. During the demo session, you can let them know your modifications and they will also clarify your doubts. At last, your multi seller ecommerce platform will be ready to launch and you can start promoting your multi vendor marketplace software.
The major fact to be noted is, when you build a online multi vendor ecommerce platform from scratch you need to wait for a long time and you need to spend more on the development. If you are okay with it then you can proceed. Else you have another option to go with.
Another option is buying ready made online multi vendor marketplace software that will have all the essential features that are required to run the platform successfully. The software will be tested and proved so there will not be any flaws. You can instantly launch the software after purchasing.
You can get an instant solution to building a multi vendor online marketplace software. This method is quite very cost-effective and it is highly advisable for the startups that are new to this field. You can also customize the software to suit your business needs.
The features that are built in the online multi vendor ecommerce platform will determine the user experience and will gain customer satisfaction. Now let us check out the comprehensive features that are too in a multi vendor ecommerce platform.
The main objective of building a online multi vendor ecommerce platform is to earn profit and generate more sales. This will be the ultimate motive for any entrepreneur. We need to know what are the revenue sources that a multi vendor marketplace software provides to the admin of the platform.
The multi vendor ecommerce platform will follow a hassle-free shipping and delivery process. This is where you can gain the maximum trust of your buyers and will also help you retain your customers effectively.
Online buyers need a one-stop solution to fulfill all their demands. Without searching for several sites to buy several products, users can just visit one online store and find a variety of products and it is quite a time saving process. A single platform that contains several vendors and their products is called a multi vendor ecommerce platform.
With the evolution of technology, multi vendor marketplace platforms have taken a new dimension that can easily predict customers’ buying behavior. The key pillars involved in any multi vendor marketplace are the admin, vendors and buyers. The platform will act as a bridge to connect all of them and facilitate users to be benefited. Let us analyze the benefits of a multi vendor ecommerce platform in detail.
Conclusion
By all means, building best multi vendor marketplace software will surely benefit us and will let to get more returns. We should also accept the fact that there are many challenges that a online marketplace software will face at its early stage. But still the future of this industry is unbeatable and you can firmly set your mind in starting your own multi seller ecommerce platform.
Understanding the importance and the functioning of a online multi vendor marketplace software will help you to build a flawless multi vendor ecommerce software. When you build a multi vendor marketplace platform with utmost perfection then you can easily win the market and can gain your audience’s attention with less effort.
#multi seller ecommerce platform #multi vendor marketplace platform #multi vendor marketplace software #best multi vendor marketplace platform #multi vendor ecommerce platform #online multi vendor software
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If you are using thread gauges or thread ring gauges you would have already heard about calibration. If you do not pay attention to thread gauge calibration then the integrity of the thread gauges you are purchasing and using could be compromised. In case you do not know what is thread gauge calibration and what is its significance then here are a few important factors that you should know about calibration.
When you order a custom trapezoidal thread gauge or a custom Whitworth thread gauge or for that matter any thread gauge, how will you know that it is exactly matching your requirements and specifications? As you know the thread gauges are inspection tools and unless they are 100% accurate there is no use having a thread gauge. When you calibrate the thread gauge you will know whether or not the tool is true to its specifications and whether it matches the required specifications 100%.
It is important to get calibration certificate along with your thread gauge when ever you are purchasing your thread gauge. All the manufacturers will arrange for a third party calibration certificate if you inform them early enough while placing your order. This may have an additional cost but you cannot avoid this cost because without having the confirmation that your thread gauge is delivered as per your requirements, you cannot confidently check the components that need to be inspected with your thread gauges. If there is any issue with the thread gauge you will think that there is something wrong with the threaded components. As a result, you would keep rejecting those components when the actual issue is with the thread gauge you are using. All such issues and mistakes could be avoided or minimized when you go for a calibration certificate when you are buying your thread gauges.
You may need to go for recalibration every time you repair your thread gauge or make any modifications to it. In case you are experiencing sudden episode of issues with your threaded components then it is best to first check the thread gauges you are using to ensure that the problem is not with the thread gauge.
It is also important to get a calibration certificate for your thread gauge if the tool has been dropped or if someone that is not trained properly use the thread gauge and exerts undue force. In other words, whenever you suspect that the thread gauge could have been damaged then it is vital go check the thread gauge and calibrate it so that you can be sure of the accuracy of the thread gauge.
Always source all your thread gauges from the most trusted companies. Whenever you are calibrating your thread gauge get it done from a reputed calibration center. You cannot afford to have a faulty thread gauge as it is an inspection tool, a standard that is used to measure the accuracy of the other tools. Therefore, make sure that your thread gauges are always well maintained and regularly calibrated.
#trapezoidal thread gauge #thread gauges #thread ring gauges #thread plug gauges #metric thread gauges #unef thread gages