I have modified src/tools/test_fsync so its output is operations per
second, instead of total seconds, e.g.:
Loops = 10000
Simple write:
8k write 52549.436/second
Compare file sync methods using one write:
(open_datasync unavailable)
open_sync 8k write 575.599/second
(fdatasync unavailable)
8k write, fsync 349.669/second
Compare file sync methods using two writes:
(open_datasync unavailable)
2 open_sync 8k writes 215.472/second
(fdatasync unavailable)
8k write, 8k write, fsync 566.493/second
Compare open_sync with different sizes:
open_sync 16k write 247.207/second
2 open_sync 8k writes 219.824/second
Test if fsync on non-write file descriptor is honored:
(If the times are similar, fsync() can sync data written
on a different descriptor.)
8k write, fsync, close 719.469/second
8k write, close, fsync 1457.288/second
This should make the values more useful.
--
Bruce Momjian <[email protected]> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ None of us is going to be here forever. +
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