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18 lines
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18 lines
1.1 KiB
Markdown
# io_uring support in gluster
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io_uring is an asynchronous I/O interface similar to linux-aio, but aims to be more performant.
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Refer https://kernel.dk/io_uring.pdf and https://kernel-recipes.org/en/2019/talks/faster-io-through-io_uring/ for more details.
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Incorporating io_uring in various layers of gluster is an ongoing activity but beginning with glusterfs-9.0, support has been added to the posix translator via the ```storage.linux-io_uring``` volume option. When this option is enabled, the posix translator in the glusterfs brick process (at the server side) will use io_uring calls for reads, writes and fsyncs as opposed to the normal pread/pwrite based syscalls.
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#### Example:
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[server~]# gluster volume set testvol storage.linux-io_uring on
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volume set: success
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[server~]#
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[server~]# gluster volume set testvol storage.linux-io_uring off
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volume set: success
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This option can be enabled/disabled only when the volume is not running.
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i.e. you can toggle the option when the volume is `Created` or is `Stopped` as indicated in ```gluster volume status $VOLNAME```
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