In many cases, a full backup set is just not feasible. Georep to the
same or different DC may be an option if the bandwidth can keep up with
the change set. If not, maybe breaking the data up into smaller more
manageable volumes where you only keep a smaller set of critical data
and just back that up. Perhaps an object store (swift?) might handle
fault tolerance distribution better for some workloads.
There's no one right answer.
On 03/23/17 12:23, Gandalf Corvotempesta wrote:
Backing up from inside each VM doesn't solve the problem
If you have to backup 500VMs you just need more than 1 day and what if
you have to restore the whole gluster storage?
How many days do you need to restore 1PB?
Probably the only solution should be a georep in the same
datacenter/rack with a similiar cluster,
ready to became the master storage.
In this case you don't need to restore anything as data are already
there,
only a little bit back in time but this double the TCO
Il 23 mar 2017 6:39 PM, "Serkan Çoban" <[email protected]
<mailto:[email protected]>> ha scritto:
Assuming a backup window of 12 hours, you need to send data at 25GB/s
to backup solution.
Using 10G Ethernet on hosts you need at least 25 host to handle
25GB/s.
You can create an EC gluster cluster that can handle this rates, or
you just backup valuable data from inside VMs using open source backup
tools like borg,attic,restic , etc...
On Thu, Mar 23, 2017 at 7:48 PM, Gandalf Corvotempesta
<[email protected]
<mailto:[email protected]>> wrote:
> Let's assume a 1PB storage full of VMs images with each brick
over ZFS,
> replica 3, sharding enabled
>
> How do you backup/restore that amount of data?
>
> Backing up daily is impossible, you'll never finish the backup
that the
> following one is starting (in other words, you need more than 24
hours)
>
> Restoring is even worse. You need more than 24 hours with the
whole cluster
> down
>
> You can't rely on ZFS snapshot due to sharding (the snapshot
took from one
> node is useless without all other node related at the same
shard) and you
> still have the same restore speed
>
> How do you backup this?
>
> Even georep isn't enough, if you have to restore the whole
storage in case
> of disaster
>
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