Anantha N. Srirama 写道:
You're probably hitting the same wall/bug that I came across; ZFS in all
versions up to and including Sol10U3 generates excessive I/O when it encounters
'fssync' or if any of the files were opened with 'O_DSYNC' option.
Why excessive I/O got generated? fsync or O_DSYNC may cause additional
write cache-flush issued by ZIL.The total amount of I/O (not including
cache flush) should remain the same, right?
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