fsync vs fdatasync on Linux

Denis Perchine (dyp@perchine.com)
Sun, 18 Feb 2001 18:22:59 +0600


Hello,

as fas as I can see from fdatasync man page, and from the latest kernel
sources (2.4.1ac3, fs/buffer.c), they are equivalent.

Using of fdatasync in database can gain significant gain on systems which
supports it (on HP it gains up to 25% with pg_bench on PostgreSQL 7.1b5).

Are there any plans to implement this correctly? And due to what problems it
was not implemented yet?

-- 
Sincerely Yours,
Denis Perchine

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