Op 27 aug. 2019 om 11:38 heeft Max Krasilnikov
<pseudo(a)avalon.org.ua> het volgende geschreven:
Hello!
Sat, Aug 24, 2019 at 10:47:55PM +0200, wido wrote:
Op 24
aug. 2019 om 16:36 heeft Darren Soothill <darren.soothill(a)suse.com> het volgende
geschreven:
So can you do it.
Yes you can.
Should you do it is the bigger question.
So my first question would be what type of drives are you using? Enterprise class drives
with a low failure rate?
Doesn’t matter. From my experience: With 2x replication you will loose data at some
point.
As a consultant I have just seen too many cases of data loss with 2x.
Please, don’t do it.
I'd like to ask: do the new features like checksumming fix this problem?
No, they don’t.
Imagine you take a machine down for maintenance and while that machine is down you loose a
disk.
You lost data. Although you can bring back the other machine you are still missing
transactions.
This is not fictional, this happens.
Same as that during the backfill of a disk you just lost the disk with the remaining copy
dies under the load of the backfills.
I have seen this happen too many times in the last years.
Don’t try to cut corners.
Wido
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