[ovirt-users] Re: Number of data bricks per oVirt HCI host

>Please clarify what are the disk groups that you are referring to? Either Raid5/6 or Raid10 with a HW controller(s). >Regarding your statement "In JBOD mode, Red Hat support only 'replica 3' >volumes." does this also mean "replica 3" variants ex. >"distributed-replicate" Nope, As far as I know - only when you have 3 copies of the data ('replica 3' only). Best Regards, Strahil Nikolov On Wed, Oct 14, 2020 at 7:34 AM C Williams <cwilliams3320(a)gmail.com&gt; wrote: > Thanks Strahil ! > > More questions may follow. > > Thanks Again For Your Help ! > > On Wed, Oct 14, 2020 at 12:29 AM Strahil Nikolov <hunter86_bg(a)yahoo.com&gt; wrote: >> Imagine you got a host with 60 Spinning Disks -> I would recommend you to split it to 10/12 disk groups and these groups will represent several bricks (6/5). >> >> Keep in mind that when you start using many (some articles state hundreds , but no exact number was given) bricks , you should consider brick multiplexing (cluster.brick-multiplex). >> >> So, you can use as many bricks you want , but each brick requires cpu time (separate thread) , tcp port number and memory. >> >> In my setup I use multiple bricks in order to spread the load via LACP over several small (1GBE) NICs. >> >> >> The only "limitation" is to have your data on separate hosts , so when you create the volume it is extremely advisable that you follow this model: >> >> hostA:/path/to/brick >> hostB:/path/to/brick >> hostC:/path/to/brick >> hostA:/path/to/brick2 >> hostB:/path/to/brick2 >> hostC:/path/to/brick2 >> >> In JBOD mode, Red Hat support only 'replica 3' volumes - just to keep that in mind. >> >> From my perspective , JBOD is suitable for NVMEs/SSDs while spinning disks should be in a raid of some type (maybe RAID10 for perf). >> >> >> Best Regards, >> Strahil Nikolov >> >> >> >> >> >> >> В сряда, 14 октомври 2020 г., 06:34:17 Гринуич+3, C Williams < cwilliams3320(a)gmail.com&gt; написа: >> >> >> >> >> >> Hello, >> >> I am getting some questions from others on my team. >> >> I have some hosts that could provide up to 6 JBOD disks for oVirt data (not arbiter) bricks >> >> Would this be workable / advisable ? I'm under the impression there should not be more than 1 data brick per HCI host . >> >> Please correct me if I'm wrong. >> >> Thank You For Your Help ! >> >> >> _______________________________________________ >> Users mailing list -- users(a)ovirt.org >> To unsubscribe send an email to users-leave(a)ovirt.org >> Privacy Statement: https://www.ovirt.org/privacy-policy.html >> oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ >> List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/OGZISNFLEG3... >> >