[Gluster-users] GlusterFS over multiples HDD

Gilberto Nunes
Thu, 30 Jul 2020 13:23:19 -0000

Well, actually I am not concerned ONLY about mirroring the data, but with
reliability on it.
Here during my lab tests I notice if I pull off a disk and then power on
the server, the LVM crashes...
On the other hand, with ZFS even in degraded state the system booted
normally.
The same happens with mdadm. That's the point.

---
Gilberto Nunes Ferreira

(47) 3025-5907
(47) 99676-7530 - Whatsapp / Telegram

Skype: gilberto.nunes36





Em qui., 30 de jul. de 2020 ?s 10:18, Alvin Starr <alvin at netvel.net>
escreveu:

> LVM supports mirroring or raid1.
> So to create a raid1 you would do something like "lvcreate -n raidvol
-L
> 1T --mirrors 1  /dev/bigvg"
> You can add a mirror to an existing logical volume using lvconvert  with
> something like "lvconvert --mirrors +1 bigvg/unmirroredlv"
>
> But other than simple mirroring you will need mdadm.
>
>
>
> On 7/30/20 8:39 AM, Gilberto Nunes wrote:
>
> Doing some research and the chvg command, which is responsable for create
> hotspare disks in LVM is available only in AIX!
> I have a Debian Buster box and there is no such command chvg. Correct me
> if I am wrong....
> ---
> Gilberto Nunes Ferreira
>
> (47) 3025-5907
> (47) 99676-7530 - Whatsapp / Telegram
>
> Skype: gilberto.nunes36
>
>
>
>
>
> Em qui., 30 de jul. de 2020 ?s 02:05, Strahil Nikolov <
> hunter86_bg at yahoo.com> escreveu:
>
>> LVM allows creating/converting striped/mirrored LVs without any dowtime
>> and it's using the md module.
>>
>> Best Regards,
>> Strahil Nikolov
>>
>> ?? 28 ??? 2020 ?. 22:43:39 GMT+03:00, Gilberto Nunes <
>> gilberto.nunes32 at gmail.com> ??????:
>> >Hi there....
>> >
>> >'till now, I am using glusterfs over XFS and so far so good.
>> >Using LVM too....
>> >Unfortunately, there is no way with XFS to merge two or more HDD,
in
>> >order
>> >to use more than one HDD, like RAID1 or RAID5.
>> >My primary goal is to use two server with GlusterFS on top of
multiples
>> >HDDs for qemu images.
>> >I have think about BTRFS or mdadm.
>> >Anybody has some experience on this?
>> >
>> >Thanks a lot
>> >
>> >---
>> >Gilberto Nunes Ferreira
>>
>
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