[Gluster-users] GlusterFS over multiples HDD

Gilberto Nunes gilberto.nunes32 at gmail.com
Thu Jul 30 16:39:16 UTC 2020


I am dealing here with just 2 nodes and a bunch of disks on it... Just a
scenario for study but real in many cases we face low budgets...
Anyway thanks for the tips!



---
Gilberto Nunes Ferreira

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

Skype: gilberto.nunes36





Em qui., 30 de jul. de 2020 às 13:34, Strahil Nikolov <hunter86_bg at yahoo.com>
escreveu:

> Anyway in raid1+spare  on a replica 2  volume you will be using 6 disks
> in total.
> It  will  be more optimal to get all those  disks  in 'replica 3' or
> 'replica 3  arbiter 1' (for the arbiter it would be optimal  to have a
> small ssd and the data disks for tge actual data).
>
> Best Regards,
> Strahil Nikolov
>
> На 30 юли 2020 г. 19:32:32 GMT+03:00, Strahil Nikolov <
> hunter86_bg at yahoo.com> написа:
> >When using legacy,  you need to  prepare the MBR on each disk, so the
> >BIOS will be able to boot from it and load grub.
> >
> >On UEFI, you will need 2 entries each pointing to the other disk. There
> >is a thread for each approach in the CentOS7 forums and the peocedure
> >is almost the same on all linux .
> >
> >Best Regards,
> >Strahil Nikolov
> >
> >На 30 юли 2020 г. 18:17:49 GMT+03:00, Gilberto Nunes
> ><gilberto.nunes32 at gmail.com> написа:
> >>I am using Legacy... But I am using Virtualbox in my labs... Perhaps
> >>this
> >>is the problem...
> >>I don't do that in real hardware. But with spare disk (2 + 1) in mdadm
> >>it's
> >>fine.
> >>
> >>---
> >>Gilberto Nunes Ferreira
> >>
> >>(47) 3025-5907
> >>(47) 99676-7530 - Whatsapp / Telegram
> >>
> >>Skype: gilberto.nunes36
> >>
> >>
> >>
> >>
> >>
> >>Em qui., 30 de jul. de 2020 às 12:16, Strahil Nikolov
> >><hunter86_bg at yahoo.com>
> >>escreveu:
> >>
> >>> 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
> >>> >>>>
> >>> >>>
> >>> >>> ________
> >>> >>>
> >>> >>>
> >>> >>>
> >>> >>> Community Meeting Calendar:
> >>> >>>
> >>> >>> Schedule -
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> >>> >listGluster-users at gluster.orghttps://
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> >>> >>>
> >>> >>>
> >>> >>> --
> >>> >>> Alvin Starr                   ||   land:  (647)478-6285
> >>> >>> Netvel Inc.                   ||   Cell:
> >>> >(416)806-0133alvin at netvel.net              ||
> >>> >>>
> >>> >>>
> >>> >>> ________
> >>> >>>
> >>> >>>
> >>> >>>
> >>> >>> Community Meeting Calendar:
> >>> >>>
> >>> >>> Schedule -
> >>> >>> Every 2nd and 4th Tuesday at 14:30 IST / 09:00 UTC
> >>> >>> Bridge: https://bluejeans.com/441850968
> >>> >>>
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> >>> >>
> >>>
>
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