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Date:      Tue, 30 Apr 2019 11:23:31 +0200
From:      rainer@ultra-secure.de
To:        Michelle Sullivan <michelle@sorbs.net>
Cc:        Andrea Venturoli <ml@netfence.it>, freebsd-stable <freebsd-stable@freebsd.org>, owner-freebsd-stable@freebsd.org
Subject:   Re: ZFS...
Message-ID:  <3634a7b3fc29b09ad0a662a4ac0e1b7a@ultra-secure.de>
In-Reply-To: <70C87D93-D1F9-458E-9723-19F9777E6F12@sorbs.net>
References:  <30506b3d-64fb-b327-94ae-d9da522f3a48@sorbs.net> <CAOtMX2gf3AZr1-QOX_6yYQoqE-H%2B8MjOWc=eK1tcwt5M3dCzdw@mail.gmail.com> <56833732-2945-4BD3-95A6-7AF55AB87674@sorbs.net> <3d0f6436-f3d7-6fee-ed81-a24d44223f2f@netfence.it> <17B373DA-4AFC-4D25-B776-0D0DED98B320@sorbs.net> <70fac2fe3f23f85dd442d93ffea368e1@ultra-secure.de> <70C87D93-D1F9-458E-9723-19F9777E6F12@sorbs.net>

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Am 2019-04-30 11:05, schrieb Michelle Sullivan:

> I wonder what would happen if you scaled that up by just 10 (storage)
> and had the master blow up where it needs to be restored from backup..
> how long would one be praying to higher powers that there is no
> problem with the backup...?


Well, the backup itself takes over a day, AFAIK.

I'm not sure why it is that slow. Maybe the old SAS6 HBAs.

It's also lots of files.

> (As in no outage or error causing a
> complete outAge.)... don’t get me wrong.. we all get to that position
> at sometime, but in my recent experience 2 issues colliding at the
> same time results in disaster.  13T is really not something I have
> issues with as I can usually cobble something together with 16T.. (at
> least until 6T drives became a viable (cost and availability at short
> notice) option...  even 10T is becoming easier to get a hold of now..
> but I have a measly 96T here and it takes weeks even with gigabit
> bonded interfaces when I need to restore.

Those are all SAS drives, actually.
600 and 1200 GB.





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