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Sent: Tuesday, April 21, 2020 2:59 AM
To: ceph-users
Subject: [ceph-users] Re: some ceph general questions about the design
>
> 1. shoud i use a raid controller a create for example a raid 5 with all disks
> on each osd server? or should i passtrough all disks to ceph osd?
>
&
>
> 1. shoud i use a raid controller a create for example a raid 5 with all disks
> on each osd server? or should i passtrough all disks to ceph osd?
>
> If your OSD servers have HDDs, buy a good RAID Controller with a
> battery-backed write cache and configure it using multiple RAID-0 volume
Hi Harald,
- then i build a 3 node osd cluster and passtrough all disks and i install
the mgr daemon on them
- i build 3 seperate mon server and install here the rgw? right?
As other friends suggested you can use VMs for mgr, mon and rgw, they are
not so IOPS intensive and they are very flexible
Hi Harald,
1. shoud i use a raid controller a create for example a raid 5 with all disks
on each osd server? or should i passtrough all disks to ceph osd?
If your OSD servers only contain flash drives, I'd suggest you go with a cheap
HBA and configure it in JBOD mode (pass-though)
If your OSD se
ok thx for the answers
we will connect later nearly 20 kvm hosts on the ceph cluster
- then i build a 3 node osd cluster and passtrough all disks and i install the
mgr daemon on them
- i build 3 seperate mon server and install here the rgw? right?
a few question to the options:
- osd crush cho
harald.freid...@gmail.com (harald.freidhof) writes:
>
> 1. shoud i use a raid controller a create for example a raid 5 with all disks
> on each osd server? or should i passtrough all disks to ceph osd?
Set up the raid controller in JBOD mode, and passthrough the disks.
> 2. if i have a
1. Do not use raid for osd disks... 1 ods per disk
2-3. I would have 3 or more osd nodes... more is better for when you have
issues or need maintenance. We use vms for mon nodes with mgr on each mon node.
5 is the recommended for a production cluster but you can be ok with 3 for a
small cluster
