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 <[email protected]> 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 < > [email protected]> 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 > ><[email protected]> 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 > >><[email protected]> > >>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 < > >>> [email protected]> 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 < > >>> >[email protected]> 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 > >><[email protected]> > >>> >> 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 < > >>> >>> [email protected]> 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 < > >>> >>>> [email protected]> 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 - > >>> >>> Every 2nd and 4th Tuesday at 14:30 IST / 09:00 UTC > >>> >>> Bridge: https://bluejeans.com/441850968 > >>> >>> > >>> >>> Gluster-users mailing > >>> >[email protected]:// > >>> lists.gluster.org/mailman/listinfo/gluster-users > >>> >>> > >>> >>> > >>> >>> -- > >>> >>> Alvin Starr || land: (647)478-6285 > >>> >>> Netvel Inc. || Cell: > >>> >(416)[email protected] || > >>> >>> > >>> >>> > >>> >>> ________ > >>> >>> > >>> >>> > >>> >>> > >>> >>> Community Meeting Calendar: > >>> >>> > >>> >>> Schedule - > >>> >>> Every 2nd and 4th Tuesday at 14:30 IST / 09:00 UTC > >>> >>> Bridge: https://bluejeans.com/441850968 > >>> >>> > >>> >>> Gluster-users mailing list > >>> >>> [email protected] > >>> >>> https://lists.gluster.org/mailman/listinfo/gluster-users > >>> >>> > >>> >> > >>> >
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