On Mi, 03 mar 21, 17:16:14, Felix Miata wrote: > Andrei POPESCU composed on 2021-03-03 17:50 (UTC+0200): > > > Felix Miata wrote: > > >> To start with, RAID1 is marginally slower than ordinary filesystems on > >> partitions. > > > This is true for some workloads, for others it can be significantly > > faster. > > > https://arstechnica.com/information-technology/2020/04/understanding-raid-how-performance-scales-from-one-disk-to-eight/ > > I wrote not RAID, but RAID1, very purposely. I found no mention of RAID1 in > any of > the graphs there, and the subject of RAID1 barely touched, basically > describing > its purely mirror topology and little else.
Quote from the article:
In our performance charts, we show a line from two disks through
eight disks for RAID10. The first datapoint, for two disks, is
obviously a simple RAID1. The datapoints for four, six, and eight
disks are RAID10. We draw a line through all points for ease of
interpretation—but there is no three, five, or seven disk RAID10 in
the actual data, for hopefully obvious reasons.
Kind regards,
Andrei
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