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Saturday, February 6 • 15:40 - 16:20
Qemu Disk I/O: Which performs better, Native or Threads?

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Qemu can use two different methods to submit disk I/O requests. The default method, "io=threads", uses a thread pool to submit these requests synchronously, while the alternate method, "io=native", uses a single thread to submit these requests asynchronously. We were curious if the default method provided the best overall throughput, so we tested both under a wide array of storage configurations. This included the use of solid state and rotational disks, different host filesystems, and even using a network file system. This paper consists of our analysis results, challenges and improvements.

avatar for Pradeep Surisetty

Pradeep Surisetty

Senior Manager, Software Engineering_Global, Red Hat

Saturday February 6, 2016 15:40 - 16:20 CET
c. D0207 (90 places)