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hdd
2012 Feb 29
0
Copy and remove performance impacted by COW reflink rewrite (2)
...e) axis
are write times. There''s a slight improvement for the initial writes,
but that''s probably due to the original file having only one extent.
SSD: img7.imageshack _dot_ us/img7/3928/ssdac.png
(rw,relatime,ssd,nospace_cache)
HDD: http://img819.imageshack _dot_ us/img819/5595/hddw.png
(rw,relatime,nospace_cache)
HDD graph is posted as reference. The oscillation is expected due to
media fragmentation, but internal fragmentation trend follows the SSD
findings for a fw initial reqrites. The slow write times are expected
due to random writes causing a 10ms head delay (500 secs...