[Gluster-users] GlusterFS over multiples HDD

[Strahil Nikolov]

The crash  with failed  mdadm disk is not normal. We need to check it out.

Are  you using  Legacy or  UEFI  ?

Best Regards,
Strahil Nikolov

На 30 юли 2020 г. 16:25:47 GMT+03:00, Gilberto Nunes <gilberto.nunes32 at gmail.com> написа:
>But I will give it a try in the lvm mirroring process.... Thanks
>---
>Gilberto Nunes Ferreira
>
>(47) 3025-5907
>(47) 99676-7530 - Whatsapp / Telegram
>
>Skype: gilberto.nunes36
>
>
>
>
>
>Em qui., 30 de jul. de 2020 às 10:23, Gilberto Nunes <
>gilberto.nunes32 at gmail.com> escreveu:
>
>> 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 às 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 às 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
>>>>
>>>> На 28 юли 2020 г. 22:43:39 GMT+03:00, Gilberto Nunes <
>>>> gilberto.nunes32 at gmail.com> написа:
>>>> >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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>>