fb16dfecae
Commit b7f05445c0 has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.
This commit removes the WWW: lines of moved-over URLs from these
pkg-descr files.
Approved by: portmgr (tcberner)
21 lines
1.2 KiB
Text
21 lines
1.2 KiB
Text
IO::AIO implements asynchronous I/O using whatever means your operating system
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supports. It is implemented as an interface to libeio.
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Asynchronous means that operations that can normally block your program (e.g.
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reading from disk) will be done asynchronously: the operation will still block,
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but you can do something else in the meantime. This is extremely useful for
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programs that need to stay interactive even when doing heavy I/O (GUI programs,
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high performance network servers etc.), but can also be used to easily do
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operations in parallel that are normally done sequentially, e.g. stat'ing many
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files, which is much faster on a RAID volume or over NFS when you do a number of
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stat operations concurrently.
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While most of this works on all types of file descriptors (for example sockets),
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using these functions on file descriptors that support nonblocking operation
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(again, sockets, pipes etc.) is very inefficient. Use an event loop for that
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(such as the EV module): IO::AIO will naturally fit into such an event loop
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itself.
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In addition to asynchronous I/O, this module also exports some rather arcane
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interfaces, such as madvise or linux's splice system call, which is why the A in
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AIO can also mean advanced.
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