How do I read multiple threads from a file?

Using more than one thread to read a file is usually a really bad idea….As per my understanding, we have below options:

1. Read each file line by line sequentially.
2. Read files in parallel in different threads line by line.
3. Read each file using buffers sequentially.
4. Read files in parallel using buffers in different threads.

Can multiple threads read the same file C?

Multiple threads can also read data from the same FITS file simultaneously, as long as the file was opened independently by each thread. Different threads should never try to write to the same FITS file.

Can multiple threads read the same file Java?

In order to read the file, only one thread is enough. You won’t gain anything by reading from several threads.

What is multithreading How does Java support multithreading?

Multithreading is a Java feature that allows concurrent execution of two or more parts of a program for maximum utilization of CPU. Each part of such program is called a thread. So, threads are light-weight processes within a process.

Can 2 threads open the same file?

You can certainly have multiple threads reading from a data structure, race conditions can potentially occur if any writing is taking place.

Can two processes read the same file at the same time?

So, theoretically, any number of processes could have concurrent READ operations outstanding against one single file. Some system resource would eventually be exhausted by all of those processes – possibly RAM, open file descriptors, or similar.

What is string in C language?

A string in C (also known as C string) is an array of characters, followed by a NULL character. To represent a string, a set of characters are enclosed within double quotes (“).

How do threads share variables?

Again, threads share memory. They share “local” variables only if the programming language used supports such sharing or such sharing occurs by “accident.” Every thread has his own stack and thread release his stack after execution. And stack is personal to thread mean no one access it other than its owner thread.

How important is multiple threads when reading a file?

If you’re only reading a file into memory, your bottleneck is likely the disk itself, in which case multiple thread won’t help you at all (it’ll just clutter your code).

What are the advantages of multithreading in C?

Multithreading in C 1 Thread creation is much faster. 2 Context switching between threads is much faster. 3 Threads can be terminated easily 4 Communication between threads is faster.

What is a thread in C programming?

Each part of such a program is called a thread, and each thread defines a separate path of execution. C does not contain any built-in support for multithreaded applications. Instead, it relies entirely upon the operating system to provide this feature.

How do I read chunks from a file in Java?

Use one thread to read chunks from the file. Every time a chunk is read, post it to a request queue. It is not worth reading multithreaded as there will be internal locks/blocking reading a common resource. Use a pool of threads.