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How to start mining via Antpool & BTC.com

by Posted in 4. Others Tagged Leave a comment 
information source: https://support.bitmain.com/hc/en-us/articles/115000211774-Connect-Antminer-S9-T9-S7-to-Pools-Antpool-BTC-com

Connect Antminer S9/T9/S7 to Pools – Antpool/BTC.com

Connect to Antpool


1.Login：https://www.antpool.com/

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2. Enter your User ID and password for Bitmain.com to log into Antpool or register a new account.

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3. Click the “Bitcoin”at the upper left of the page. Go to the Settings tab and add a Sub-Account via the button on the right.

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Sub-account must contain only the letters or numbers

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4. Enter the default IP address of the ANTMINER  – Go to the login page, enter the user ID: root, password: root.

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5. Click Miner Configuration, you can fill in 3 groups of mining pool. If the first group is dead, then, it will automatically pointed to the second group. You could fill first 2 groups with Antpool, the third one with BTC.com.

Below is the configuration of Antpool:

stratum+tcp://stratum.antpool.com:3333
stratum+tcp://stratum.antpool.com:443
stratum+tcp://stratum.antpool.com:25

Worker Format: sub-account.miner name

Example: If your sub-account is “antminer”, then your miners could be set up as antminer.1, antminer_1, antminer.2, etc. The miner order will be sorted by the miner name.

Password: (Blank). if you change addresses in bulk, fill it as 123.

 

Click Save & Apply to mine, the miners will be restart.

 

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Connect to BTC.com

Account Registration

1. Login the home page： https://pool.btc.com

2. Click the “Sign Up Now ” button:

 

 

3. Complete the informtaion required and create a new account:

 

Sub-Account Configuration

1. Click the user name on the top right and choose create sub-account:

 

2. Fill the blanks and complete creating sub-account:

 

Miner Configuration

1. Node Selection

There is network delay when users connecting miners to different nodes in different area. Selecting the nearest nodes can provide the most stable connection.

North China Mining Address

    stratum+tcp://cn.ss.btc.com:1800
    stratum+tcp://cn.ss.btc.com:443
    stratum+tcp://cn.ss.btc.com:25

South China Mining Address

    stratum+tcp://us.ss.btc.com:1800
    stratum+tcp://us.ss.btc.com:443
    stratum+tcp://us.ss.btc.com:25

America Mining Address

    stratum+tcp://us.ss.btc.com:1800
    stratum+tcp://us.ss.btc.com:443
    stratum+tcp://us.ss.btc.com:25

Europe Mining Address

    stratum+tcp://us.ss.btc.com:1800
    stratum+tcp://us.ss.btc.com:443
    stratum+tcp://us.ss.btc.com:25

 

2. Miner Setting

Format: sub-account.miner name

Example: If your sub-account is “btcminer”, then your miners could be set up as btcminer.001, btcminer.002, etc. The miner order will be sorted by the miner name. Password: (Blank). if you change addresses in bulk, fill it as 123.

3. Miner Conection Setting

Type the IP address of miners into the address bar with a web browser under the local area network. The default account is: username ‘root’, password ‘root’.


Sub-Account Management

1. After signing up on BTC pool, uses can establish multiple sub-accounts for different needs.

Click the current sub-account on top right corner:

 

2. Users can edit every sub-account on this page, such as modifying address and setting alert:

 

 

Information Modification

Click “settings” button on top right of the website, you can modify your account and address as follows:

 

Payment Confirmation

Payment Time

BTC Pool settles all the earnings of last day at UTC 00:00 and sends the payment in 2 hours.

Confirmation Time

The confirmation of TX takes time on Bitcoin Network. The time could be 1 minute or up to 2 hours, which depends on the network status. BTC Pool promises that users receive the payment in the shortest time.

Quality Management Concept – Quality vs Grade & Accuracy vs Precision

by Posted in 4. Others 82 Comments

Difference between Quality and Grade

Quality and grade is difference. Quality as a delivered performance or result is “the degree to which a set of inherent characteristics fulfill requirements” (ISO 9000). Grade as a design intent is a category assigned to deliverables having the same functional use but different technical characteristics. While a quality level that fails to meet quality requirements is always a problem, a low grade of quality may not be a problem. For example:

  • It may not be a problem if a suitable low-grade software product (one which a limited number of features) is a high quality (no obvious defects, readable manual). In this example, the product would be appropriate for its general purpose of use.
  • It may be a problem if a high-grade software product (one which numerous features) is of low quality (many defects, poorly organized user documentation). In essence, its high-grade feature set would prove ineffective and/or inefficient due to its low quality.

Difference between Accuracy and Precision

The project management team should determine the appropriate levels of accuracy and precision for use in the quality management plan. Precision is a measure of exactness. Accuracy is an assessment of correctness. For example, if the measured value of an item is very close to the true value of the characteristic being meansured. the measurement is more accurate. An illustration of this concept is the comparison of archery targets. Arrows clustered tightly in one area of the target, even if they are not clustered in the bull’s eye, are considered to have high precision. Targets where the arrows are more spread out but equidistant from the bull’s eye are considered to have the same degree of accuracy. Targets were the arrows are both tightly grouped and within the bull’s eye are considered to be both accurate and precise. Precise measurements are not necessary accurate measurements, are accurate measurements are not necessarily precise measurements.

Diary of IT Man – My Road to Pass PMP Exam

by Posted in Diary of IT Man(IT人在工廠日記) Leave a comment

pmpIt was a nowadays requirement for any professional to continue study, so, I planned to enhance my project management knowledge which should be useful for my IT management skill. I decided to take a PMP exam and got a PMP certification. PMP stands for Project Management Professional, and it is endorsed by a US’s Project Management Institute (https://www.pmi.org/).

I thought that PMP exam should be easy for me because I had rich experience to handle IT projects. I did not intent to join any course, however, it was a requirement from PMI that a candidate had to register a course, so that I registered a PMP on-line preparing course from https://www.udemy.com/ in Oct 2017. The Udemy PMP course costed only US$10.99, which was a very good price. Although the concept of project management was very generic, I needed to learn many PMP specific terms and definition from Udemy, which were new to me. After I have finished the Udemy on-line course, I could only get 70 marks from its drill test, which I should get 75 marks or above in order to ensure to pass the exam according to the lecturer comment.

After the Udemy course, I borrowed two books from library to self-study: I) “Pass the PMP exam : tools, tips and tricks to succeed” by Sean Whitaker ; ii) “PMP practice makes perfect : over 1000 PMP practice questions and answers” by John Estrella. After I have finished these two books, I still did not comfortable. I searched from web and found a web site  https://edward-designer.com/web/pmp/ which Edward shared his experience about PMP exam. It provided me many useful information.

My final preparation work is to read the PMBOKGuide from PMI, and did more free mock exam questions from web, such as from Oliver Lehmann (Online) and Edwel Mock Exam.

Luckily, I passed the PMP exam in my first in-take. I spent totally 6 months to prepare the exam, and I passed it in Mar 2018.

_____________________________________________________________________

Additional information about Changing of PMP Exam on or after 26 Mar 2018 as below.

The release of the PMBOK® Guide – Sixth Edition in September 2017, the PMP exam will change 26 March 2018. These updates will ensure the exam content is consistent with the PMBOK® Guide.

Although the PMP is not a test of the PMBOK® Guide, it is one of the primary references for the exam. Some of the updates you can expect to see surround lexicon changes and terminology used within the exam as well as harmonization of process groups, tools, and techniques.

The major updates to the sixth edition are summarized below:

  • A new chapter on the role of the project manager has been added to focus on leading projects effectively – competencies, experience, and skills that are all necessary.
  • Two Knowledge Areas have been re-named to more accurately reflect which elements can be managed and which cannot:

o    Time Management is now Schedule Management

o    Human Resource Management is now Resource Management

Every Knowledge Area features four new sections:

  1. Key Concepts
  2. Trends and Emerging Practices
  3. Tailoring Considerations
  4. Considerations for Agile/Adaptive Environments

The sixth edition will also present new content around considerations for agile/adaptive environments and the PMI Talent Triangle®.

We wish you the best of luck on upcoming exam!

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