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From Ivan Kudryavtsev <kudryavtsev...@bw-sw.com>
Subject Re: [VOTE] Ceph, ZFS or Linux Soft RAID?
Date Mon, 15 Jul 2019 13:45:19 GMT
ZFS is not a good choice for high IO applications. Use the most simple
layering as possible.

пн, 15 июл. 2019 г., 18:50 Christoffer Pedersen <vrod@vrod.dk>:

> Hello,
>
> ZFS is unfortunately not supported, otherwise I would have recommended
> that. But if you are going local systems (no nfs/iscsi), ext4 would be the
> way to go.
>
> On Mon, Jul 15, 2019 at 1:23 PM Ivan Kudryavtsev <kudryavtsev_ia@bw-sw.com
> >
> wrote:
>
> > Hi,
> >
> > if you use local fs, use just ext4 over the required disk topology which
> > gives the desired redundancy.
> >
> > E.g. JBOD, R0 work well when data safety policy is established and
> backups
> > are maintained well.
> >
> > Otherwise look to R5, R10 or R6.
> >
> > пн, 15 июл. 2019 г., 18:05 <nux@li.nux.ro>:
> >
> > > Isn't that a bit apples and oranges? Ceph is a network distributed
> > > thingy, not a local solution.
> > >
> > > I'd use linux/software raid + lvm, it's the only one supported (by
> > > CentOS/RedHat).
> > >
> > > ZFS on Linux could be interesting if it was supported by Cloudstack,
> but
> > > it is not, you'd end up using qcow2 (COW) files on top of a COW
> > > filesystem which could lead to issues. Also ZFS is not really the
> > > fastest fs out there, though it does have some nice features.
> > >
> > > Did you really mean raid 0? I hope you have backups. :)
> > >
> > > hth
> > >
> > >
> > > On 2019-07-15 11:49, Fariborz Navidan wrote:
> > > > Hello,
> > > >
> > > > Which one do you think is faster to use for local soft Raid-0 for
> > > > primary
> > > > storage? Ceph, ZFS or Built-in soft raid manager of CentOS? Which one
> > > > can
> > > > gives us better IOPS and IO latency on NVMe SSD disks? The storage
> will
> > > > be
> > > > used for production cloud environment where arround 60 VMs will run
> on
> > > > top
> > > > of it.
> > > >
> > > > Your ides are highly appreciated
> > >
> >
>
>
> --
> Thanks,
> Chris pedersen
>

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