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https://www.kernel.org/doc/ols/2003/ols2003-pages-351-366.pdf
• Asynchronous filesystem I/O • Asynchronous direct I/O • Asynchronous vector I/O As of Linux 2.5, AIO falls into the common mainline path underlying all I/O operations, whether synchronous or asynchronous. The implications of this, and other significant ways in which the design for AIO in 2.5 …Cited by: 19
https://www.academia.edu/30092781/Asynchronous_I_O_support_in_Linux_2.5
This paper describes the Asynchronous I/O (AIO) support in the Linux® 2.5 kernel, additional functionality available as patchsets, and plans for further improvements. More specifically, the following topics are treated in some depth:
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/5/html/tuning_and_optimizing_red_hat_enterprise_linux_for_oracle_9i_and_10g_databases/sect-oracle_9i_and_10g_tuning_guide-enabling_asynchronous_io_and_direct_io_support-verifying_asynchronous_io_usage
Lowering the Mapped Base Address for Shared Libraries in Red Hat Enterprise Linux 2.1; 15.5. Lowering the SGA Attach Address for Shared Memory Segments in Oracle 9i; ... You also have to ensure that Oracle is configured to use asynchronous I/O calls, see Enabling Asynchronous I/O Support.
https://support.oracle.com/knowledge/Oracle%20Linux%20and%20Virtualization/237299_1.html
In this document we are going to explain how to check that asynchronous I/O (AIO) is working. AIO can be enabled in Oracle 9i 9.2 and higher. Many times there is a requirement to check if Asynchronous I/O is working on Linux Platform, so we can try to use it for our datafiles access inside database. Solution
http://davmac.org/davpage/linux/async-io.html
Asynchronous I/O and event notification on linux. Updated 15/6/2008: Added proper introduction, general cleanups, made the problems with POSIX AIO clearer. Updated 22/9/2009:Re-ordered the sections a bit, added information on the difference between edge- and level-triggered notification mechanisms, and added information on signalfd() and the "signal handler writes to pipe" techniques.
https://stackoverflow.com/questions/28999765/how-does-the-linux-kernel-handle-asynchronous-i-o-aio-requests
Multiple sync I/O requests results in the same benefits as multiple async I/O requests. The main differences between asynchronous and synchronous I/O come down to how I/O & processes scheduling and to the programming model. Both async & sync I/O can squeeze the same IOPS/throughput from a storage device if done right.
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