Download epool pool
Publish: 2021-03-30 21:29:14
1.
Mine pool refers to:
as the computing level of the whole bitcoin network continues to rise exponentially, a single device or a small amount of computing power can not get the block reward provided by the bitcoin network on the bitcoin network
after the computing power of the whole network has been improved to a certain extent, the low probability of getting rewards has prompted some geeks on "bitcoin talk" to develop a method that can combine a small amount of computing power and operate jointly, and the website established in this way is called "mine pool"
extended data:
the existence of the mine pool reces the difficulty of bitcoin and other virtual digital currency mining, reces the mining threshold, and truly realizes the bitcoin mining concept that everyone can participate in
but its disadvantages are also very obvious, because computing power is connected to the mine pool. As a mine pool, it will have huge computing power resources. In the bitcoin world, computing power represents the bookkeeping right, and computing power is everything. If the computing power of a single mine pool reaches more than 50%, it will be easy to launch 51% attacks against virtual digital currencies such as bitcoin, The consequences are very terrible:
the mine pool can make the mine pool with 49% of the remaining computing power have no harvest, instantly quit the competition and go bankrupt. The mine pool's computing power exceeds 50%. If 51% attack is launched, it will easily occupy all the effective computing power of the whole network
2. It's a service that allows miners to work together to create blocks and split profits. This allows miners to get a steady income, rather than a small probability of getting 50 (now 25) bitcoins at a time
3. So it was sent
please accept if you are satisfied<
if you don't receive the email, please check your trash can,
and then check your email to make sure it is open and correct
if you have any questions, please contact me with your address
it's OK for me to ask or email directly
I will try to solve it in time
PS: 1. Files are generally not expired and can be downloaded
2. We sincerely suggest losing QQ email
if the number of downloads exceeds 7, you can't download the attachment and forward it to your QQ mailbox
if the attachment has been downloaded more than 200 times, you can't download it. Please save it to your transfer station and download it again
-- from the network know team [ghost animal glasses and R]
please accept if you are satisfied<
if you don't receive the email, please check your trash can,
and then check your email to make sure it is open and correct
if you have any questions, please contact me with your address
it's OK for me to ask or email directly
I will try to solve it in time
PS: 1. Files are generally not expired and can be downloaded
2. We sincerely suggest losing QQ email
if the number of downloads exceeds 7, you can't download the attachment and forward it to your QQ mailbox
if the attachment has been downloaded more than 200 times, you can't download it. Please save it to your transfer station and download it again
-- from the network know team [ghost animal glasses and R]
4. http://mail.qq.com/cgi-bin/ftnExs_download?k=&t=exs_ftn_download&code=d6b9c9ec&s=email
20103e26376;- 2926202;- 11:58-21040;- 2639920146;-242304;
20103e26376;- 2926202;- 11:58-21040;- 2639920146;-242304;
5. What kind of watch is easy xp00l? I think the easy xp0026 is a seagull watch. The quality is very good, and the price is not high. The cost performance is relatively good
6. Sweet pool game has been sent
decompressed to run
this is a Chinese version, no need to patch it again
the content of this game is quite distorted, please hit the lightning rod - W -
when I play the game, I'm not clear by thunder...
it's not human... Protagonists
decompressed to run
this is a Chinese version, no need to patch it again
the content of this game is quite distorted, please hit the lightning rod - W -
when I play the game, I'm not clear by thunder...
it's not human... Protagonists
7. 1、 Background
first, let's talk about the functions I want to realize. The server has been running under the Linux platform. When the client has a request, the server receives the request, gets the data of the client, and makes corresponding processing according to the data, and sends the result data to the client directly. The end of such a connection request is not the case of a long connection, and the connection of the client will not be maintained all the time. One by one, one by one, it's over< Second, source code download (including client test code)
I have simplified the logic processing part. If this code is useful to you, you can implement the logic processing part yourself
the code is to pass in parameters, port
I have compiled the code under Linux, and the test number, because the database is used in the code. If you have not compiled it, you may need to install MySQL database under Linux
source code download address
three, a brief introction to the code
socket accept thread: C language for high concurrency, so choose epoll. When the program starts (G_ net_ The main function in the update. C file will start a thread. See the function create_ accept_ Task) this thread deals with one thing. It only receives the connection from the client. When a connection comes in, it will be sent through epoll_ CTL function, add socket FD to epoll, and epoll sets the monitoring event epollin | epollet; It mainly monitors whether the socket added to epoll is readable (because my requirement is that the client will send a data to the server immediately after connecting to the server). The rest is handled in the main thread
main thread: a wireless loop, epoll_ The wait function is equivalent to taking the client's connection out of epoll (because we are listening to epollin | epollet), which indicates that the client has sent data at this time). And then through recv_ buffer_ from_ The FD function reads the data sent by the client. Then everything else is left to the thread pool
thread pool: (in the code, I will create 15 threads in the pool) bidirectional linked list. Adding thread is to add a linked list item after the linked list, and the front of the linked list will be handled one by one. Mainly malloc function, free function, SEM_ Wait function SEM_ Post processing (SEM)_ Wait will block. When the value is greater than 0, it will decrease by one_ Post is the value plus one. typedef void* (FUNC)(void arg, int index); It is the logic processing part of our custom thread, arg is the parameter, and index is the processing part of the first thread (we implicitly mark each thread with a number), such as responses in the code_ stb_ Info. To be more specific, you can see how the code is implemented. Smart, you can also change this content into a dynamic thread pool. When there are more processing at a certain time, you can dynamically add threads instead of fixed in my code
database connection pool: according to my requirements, when processing client request data, I want to access the database. Is to create a bunch of data connections all at once. To access the database, first go to the database connection pool to find out the idle connection, see the code. When using, you can refer to the database_ Process. C file (the number of database connection pools and thread pools in the code is the same). Here I want to talk about get_ db_ connect_ from_ The pool function, I used a random number, I do not want to start from 0 every time to determine which connection is not used. For each link in the database connection pool can be used with equal probability, we can see the implementation of the code
log file. In the code, log information can be automatically saved to the file. See the code for details
four, some problems encountered and solutions
at the beginning, the server program accounted for more than 90% of the usage of Linux, because we were in create_ accept_ Socket in task is not set to blocking
the server often encounters some unexplained crashes, so it is impossible to use the core MP to catch the stack information of the crash to see which function crashed
when processing the database, some data will be broken automatically (say 8 hours). Later, the method is to use MySQL first every time_ Ping him once again
let's just say a few points. In fact, there are a lot of others that we won't say
five, several commands used under Linux
. / server program name & / / add & run in the background
kill server program name / / stop running the server. In the server directory,
netstat - ANTP | grep: port number / / check the socket status under the port,
PS - EAF | grep server program name / / check whether the program is running, but I usually use netstat - ANTP | grep: port number to check whether the program is running
well, that's it. If you want to achieve high concurrency in Java, you can take a look at Linux java + Apache Mina + Maven to achieve high concurrency server
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first, let's talk about the functions I want to realize. The server has been running under the Linux platform. When the client has a request, the server receives the request, gets the data of the client, and makes corresponding processing according to the data, and sends the result data to the client directly. The end of such a connection request is not the case of a long connection, and the connection of the client will not be maintained all the time. One by one, one by one, it's over< Second, source code download (including client test code)
I have simplified the logic processing part. If this code is useful to you, you can implement the logic processing part yourself
the code is to pass in parameters, port
I have compiled the code under Linux, and the test number, because the database is used in the code. If you have not compiled it, you may need to install MySQL database under Linux
source code download address
three, a brief introction to the code
socket accept thread: C language for high concurrency, so choose epoll. When the program starts (G_ net_ The main function in the update. C file will start a thread. See the function create_ accept_ Task) this thread deals with one thing. It only receives the connection from the client. When a connection comes in, it will be sent through epoll_ CTL function, add socket FD to epoll, and epoll sets the monitoring event epollin | epollet; It mainly monitors whether the socket added to epoll is readable (because my requirement is that the client will send a data to the server immediately after connecting to the server). The rest is handled in the main thread
main thread: a wireless loop, epoll_ The wait function is equivalent to taking the client's connection out of epoll (because we are listening to epollin | epollet), which indicates that the client has sent data at this time). And then through recv_ buffer_ from_ The FD function reads the data sent by the client. Then everything else is left to the thread pool
thread pool: (in the code, I will create 15 threads in the pool) bidirectional linked list. Adding thread is to add a linked list item after the linked list, and the front of the linked list will be handled one by one. Mainly malloc function, free function, SEM_ Wait function SEM_ Post processing (SEM)_ Wait will block. When the value is greater than 0, it will decrease by one_ Post is the value plus one. typedef void* (FUNC)(void arg, int index); It is the logic processing part of our custom thread, arg is the parameter, and index is the processing part of the first thread (we implicitly mark each thread with a number), such as responses in the code_ stb_ Info. To be more specific, you can see how the code is implemented. Smart, you can also change this content into a dynamic thread pool. When there are more processing at a certain time, you can dynamically add threads instead of fixed in my code
database connection pool: according to my requirements, when processing client request data, I want to access the database. Is to create a bunch of data connections all at once. To access the database, first go to the database connection pool to find out the idle connection, see the code. When using, you can refer to the database_ Process. C file (the number of database connection pools and thread pools in the code is the same). Here I want to talk about get_ db_ connect_ from_ The pool function, I used a random number, I do not want to start from 0 every time to determine which connection is not used. For each link in the database connection pool can be used with equal probability, we can see the implementation of the code
log file. In the code, log information can be automatically saved to the file. See the code for details
four, some problems encountered and solutions
at the beginning, the server program accounted for more than 90% of the usage of Linux, because we were in create_ accept_ Socket in task is not set to blocking
the server often encounters some unexplained crashes, so it is impossible to use the core MP to catch the stack information of the crash to see which function crashed
when processing the database, some data will be broken automatically (say 8 hours). Later, the method is to use MySQL first every time_ Ping him once again
let's just say a few points. In fact, there are a lot of others that we won't say
five, several commands used under Linux
. / server program name & / / add & run in the background
kill server program name / / stop running the server. In the server directory,
netstat - ANTP | grep: port number / / check the socket status under the port,
PS - EAF | grep server program name / / check whether the program is running, but I usually use netstat - ANTP | grep: port number to check whether the program is running
well, that's it. If you want to achieve high concurrency in Java, you can take a look at Linux java + Apache Mina + Maven to achieve high concurrency server
Top
2
2
8. The swimming pool is ( 50 ) ( metres long
9. Multithreading in unity3d. Thread is a very complex topic, but if you master it, you can easily use multiple hardware processors or process, it is difficult to divide the management data block
for example, a * algorithm is used to calculate a large amount of data in the scene, a large number of vertices are operated in the deformable mesh, and image processing such as uploading data to the server and QR code recognition is continuously needed. If you have to deal with many things or interact with unity objects at the same time, thread can be used, otherwise coroutine can be used
threads run simultaneously with other threads in the program. In a multiprocessor computer, the real synchronization of multiple threads can be achieved. More threads depend on multiple processing cores
when programming with unity3d, there is always a main thread to execute your code. You can also create additional threads to run with the main thread at the same time. In unity, you can only access unity3d components, objects and unity3d system calls from the main thread. Any second thread that attempts to access these projects will fail and cause an error, which is a restriction to be taken seriously
so when you write code, you think that a function starts and returns when it reaches its execution point. Similarly, what you do is executed in another function, but there is no corresponding change. The operating system decides the execution of your code. At any time, your code can only temporarily "sleep" off, and then let other code start to run.
for example, a * algorithm is used to calculate a large amount of data in the scene, a large number of vertices are operated in the deformable mesh, and image processing such as uploading data to the server and QR code recognition is continuously needed. If you have to deal with many things or interact with unity objects at the same time, thread can be used, otherwise coroutine can be used
threads run simultaneously with other threads in the program. In a multiprocessor computer, the real synchronization of multiple threads can be achieved. More threads depend on multiple processing cores
when programming with unity3d, there is always a main thread to execute your code. You can also create additional threads to run with the main thread at the same time. In unity, you can only access unity3d components, objects and unity3d system calls from the main thread. Any second thread that attempts to access these projects will fail and cause an error, which is a restriction to be taken seriously
so when you write code, you think that a function starts and returns when it reaches its execution point. Similarly, what you do is executed in another function, but there is no corresponding change. The operating system decides the execution of your code. At any time, your code can only temporarily "sleep" off, and then let other code start to run.
10. Pro ~ you try again... Sent it
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