> >> > - Use 2 HDDs for SO using RAID 1 (I've left 3.5TB unallocated in case >> >> I can use it later for storage) >> >> OS not? get enterprise ssd as os (I think some recommend it when >> colocating monitors, can generate a lot of disk io) > >Yes, OS. I have no option to get a SSD. one samsung ssd sm863 of 240GB on ebay is 180us$. How much are your 2x hdd
> >> >> > - Install CentOS 7.7 >> >> Good choice >> >> > - Use 2 vLANs, one for ceph internal usage and another for external >> >> access. Since they've 4 network adapters, I'll try to bond them in pairs >> to speed up network (1Gb). >> >> Bad, get 10Gbit, yes really > >Again, that's not an option. We'll have to use the hardware we got. Maybe you can try and convince ceph development to optimize for bonding on 1gbit beware of this: https://www.mail-archive.com/ceph-users@lists.ceph.com/msg35474.html Make sure you test your requirements, because ceph is quite some overhead. > >> >> > - I'll try to use ceph-ansible for installation. I failed to use it on >> >> lab, but it seems more recommended. >> >> Where did you get it from that ansible is recommended? Ansible is a tool >> to help you automate deployments, but I have the impression it is mostly >> used as a 'I do not know how to install something' so lets use ansible >> tool. > >From reaing various sites/guides for lab. > >> >> > - Install Ceph Nautilus >> >> > >> >> > - Each server will host OSD, MON, MGR and MDS. >> >> > - One VM for ceph-admin: This wil be used to run ceph-ansible and >> >> maybe to host some ceph services later >> >> Don't waste a vm on this? > >You think it is a waste to have a VM for this? Won't I need another machine to host other ceph services? I am not having a vm for ceph admin. Depends on what you are going to do, and eg. how much memory you have / are using. The thing to beware of is that you could get kernel deadlocks when running tasks on osd nodes. This is being prevented by using a vm. However this all depends on the availability of memory. I didn't encounter this and others are running also successfully afaik. _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
