11:10 p.m.
На 16 юли 2020 г. 0:41:22 GMT+03:00, Philip Brown <pbrown(a)medata.com> написа:
Hmm...
Are you then saying, that YES, all host nodes need to be able to talk
to the glusterfs filesystem?
No, but you sounded like you need that.
You can have 'replica 3' and 2 hosts won't have gluster server running (still
able to mount).
on a related note, I'd like to have as few nodes actually holding
glusterfs data as possible, since I want that data on SSD.
Rather than multiple "replication set" hosts, and one arbiter.. is it
instead possible to have only 2 replication set hosts, and multiple
(arbitrariliy many) arbiter nodes?
You need 2 copies of the data, but 'replica 3' is most optimal.
----- Original Message -----
From: "Strahil Nikolov" <hunter86_bg(a)yahoo.com>
To: "users" <users(a)ovirt.org>, "Philip Brown"
<pbrown(a)medata.com>
Sent: Wednesday, July 15, 2020 1:59:40 PM
Subject: Re: [ovirt-users] Re: mixed hyperconverged?
You can use a distributed replicated volume of type 'replica 3
arbiter 1'.
For example, NodeA and NodeB are contain replica set 1 with NodeC
as their arbiter and NodeD and NodeE as the second replica set 2
with NodeC as thir arbiter also.
In such case you got only 2 copies of a single shard, but you are fully
"supported" from gluster perspective.
Also, all hosts can have an external storage like your NAS.
Best Regards,
Strahil Nikolov
На 15 юли 2020 г. 21:11:34 GMT+03:00, Philip Brown <pbrown(a)medata.com>
написа:
>arg. when I said "add 2 more nodes that arent part of the cluster", I
>meant,
>"part of the glusterfs cluster".
>
>or at minimum, maybe some kind of client-only setup, if they need
>access?
>
>
>----- Original Message -----
>From: "Philip Brown" <pbrown(a)medata.com>
>To: "users" <users(a)ovirt.org>
>Sent: Wednesday, July 15, 2020 10:37:48 AM
>Subject: [ovirt-users] mixed hyperconverged?
>
>I'm thinking of doing an SSD based hyperconverged setup (for 4.3), but
>am wondering about certain design issues.
>
>seems like the optimal number is 3 nodes for the glusterfs.
>but.. I want 5 host nodes, not 3
>and I want the main storage for VMs to be separate iSCSI NAS boxes.
>Is it possible to have 3 nodes be the hyperconverged stuff.. but then
>add in 2 "regular" nodes, that dont store anything and arent part of
>the cluster?
>
>is it required to be part of the gluster cluster, to also be part of
>the ovirt cluster, if thats where the hosted-engine lives?
>or can I just have the hosted engine be switchable between the 3
nodes,
>and the other 2 be VM-only hosts?
>
>Any recommendations here?
>
>I dont what 5 way replication going on. Nor do I want to have to pay
>for large SSDs on all my host nodes.
>(Im planning to run them with the ovirt 3.4 node image)
>
>
>
>--
>Philip Brown| Sr. Linux System Administrator | Medata, Inc.
>5 Peters Canyon Rd Suite 250
>Irvine CA 92606
>Office 714.918.1310| Fax 714.918.1325
>pbrown(a)medata.com| www.medata.com
>_______________________________________________
Best Regards,
Strahil Nikolov