Re: [a bit off-topic] Power usage estimation of hardware for Ceph

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Christian Balzer wrote:

> Simply put, a RAID1 of SSDs will require you to get twice as many SSDs as
> otherwise needed. And most people don't want to spend that money.
> In addition to that DC level SSDs tend to very reliable and your cluster
> will have to be able to withstand losses like this anyway.
> Finally using a RAID1 to protect against a SSD failure caused by it
> running out of write cycles is inefficient unless you're using SSDs with
> differing TBW endurance. Because if the SSDs are identical and have seen
> exactly the same write load from the start, they're likely to fail at the
> same time (or in the Intel DC S ones even guaranteed to be switched to
> read-only).

Ok, thx Christian, I'm really convinced by your arguments. :)

-- 
François Lafont
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