HDD, FS, O_SYNC : Throughput vs. Integrity

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TheCodeArtist

Software Developer (Senior) PathPartner Technology
India

Chinmay V S is a Senior software engineer at PathPartner. He has 3.5 Years of hands-on experience in Linux Kernel and Android BSP development. He was actively involved in developing and integrating drivers for the Linux-kernel and hardware abstraction layers for OMAP4 based Android smartphones.

In his spare time he enjoys sharing his experiences with technology as TheCodeArtist.

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Filesystems, block-devices, throughput and data-integrity. Why O_SYNC on a filesystem does NOT guarantee a write to the HDD and why Raw-I/O over BLOCK devices DOES guarantee a write to disk.

Type	Technical Blog
Licence	CC (ASA 3U)
First Posted	16 Sep 2012
Views	2,428
Bookmarked	4 times

CArchitectDevLinux
IntermediateSysAdmin, +

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