What you mentioned is a specific case and not a generic situation. The
main point there is that RAID 5 or 6 impacts write performance compared
when you write to only 2 given disks at a time. That was the comparison
On 07/08/2017 16:49, Fabrice Bacchella wrote:
Le 7 août 2017 à 17:41, FERNANDO FREDIANI <fernando.fredi...@upx.com
<mailto:fernando.fredi...@upx.com>> a écrit :
Yet another downside of having a RAID (specially RAID 5 or 6) is that
it reduces considerably the write speeds as each group of disks will
end up having the write speed of a single disk as all other disks of
that group have to wait for each other to write as well.
That's not true if you have medium to high range hardware raid. For
example, HP Smart Array come with a flash cache of about 1 or 2 Gb
that hides that from the OS.
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