Hi list,
I would ask a question: how XFS block size affect read-modify-write in
case of very small writes?
For example, suppose an XFS filesystem with the default 4K data block
size. Am I correct saying that:
- a 512B normal, cached writes will cause a read-modify-write of the
entire 4K sector?
- a 512B O_DIRECT write will *not* cause a read-modify-write of the 4K
sector, rather it will be flushed to disk as-is (512 bytes in length)?
Thanks.
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Danti Gionatan
Supporto Tecnico
Assyoma S.r.l. - www.assyoma.it
email: g.danti@xxxxxxxxxx - info@xxxxxxxxxx
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