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# 1  
Old 09-13-2010
Pipe & fifo size limit
Hi guys.

1. how much is the size of pipe?(i mean the buffer size)
2. is this size different in various UNIX derivations?
3. what happens if we write to a full pipe? does it block until get some free space(the other side receive data) or returns an error?
3. FIFO s are physical files on the system. so their size limit must be limited to the file system. am i right?
# 2  
Old 09-13-2010
Quote:
Originally Posted by majid.merkava
Hi guys.

1. how much is the size of pipe?(i mean the buffer size)
2. is this size different in various UNIX derivations?
As you suspected, this varies. I've heard 64KB stated sometimes, but it's not especially important.
Quote:
3. what happens if we write to a full pipe? does it block until get some free space(the other side receive data) or returns an error?
Unless you've configured it as nonblocking, it blocks.
Quote:
3. FIFO s are physical files on the system. so their size limit must be limited to the file system. am i right?
No. Their contents aren't stored on the filesystem.
# 3  
Old 09-13-2010
Thank you very much.
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