Just curious. Would Gluster with a JBOD configuration make sense in this scenario? Maybe with dm-cache on the SSDs?
In general, does a Gluster JBOD configuration make sense as a backend for oVirt? Eduardo Mayoral Jimeno (emayo...@arsys.es) Administrador de sistemas. Departamento de Plataformas. Arsys internet. +34 941 620 145 ext. 5153 On 13/11/17 12:47, FERNANDO FREDIANI wrote: > > Helli Rudi > > Nice specs. > > I wouldn't use GlusterFS for this setup with the third server in a > different location. Just have this server as an Standalone and > replicate the VMs there. You won't have real time replication, but > much less hassle and probably to have constant failures, specially > knowing you have a wireless link. > > For the SSDs I have been using bcache with success. Relatively simple > to setup and pretty good performance. > > For your specs as you have 4 mechanical disks I would recommend you to > have a RAID 5 between them (4 disks is my limit for RAID 5) and a RAID > 0 made of SSDs for the bcache device. If the RAID 0 fails for any > reason it will fall back directly to the mechanical disks and you can > do maintenance on the Node doing live migration in order to replace > the failed disks. > > However as you have you have 2 remaining server to create your cluster > you may need to consider GlusterFS on the top of this RAID to have the > replication and Highavaibility. > > Hope it helps. > > Fernando > > > On 13/11/2017 08:03, Rudi Ahlers wrote: >> Hi, >> >> Can someone please give me some pointers, what would be the best >> setup for performance and reliability? >> >> We have the following hardware setup: >> >> 3x Supermicro server with following features per server: >> 128GB RAM >> 4x 8TB SATA HDD >> 2x SSD drives (intel_ssdsc2ba400g4 - 400GB DC S3710) >> 2x 12 core CPU (Intel(R) Xeon(R) CPU E5-2650 v4 @ 2.20GHz >> Quad port 10Gbe Inter NIC >> 2x 10GB Cisco switches (to isolate storage network from LAN) >> >> One of the servers will be in another office, with a 600Mb wireless >> link for Disaster Recovery. >> >> What is recommended for the best setup in terms of redundancy and speed? >> >> I am guessing GlusterFS with a Distributed Striped Replicated Volume >> across 3 of the servers. >> >> For added performance I want to use the SSD drives, perhaps with >> dm-cache? >> >> Should I combine the 4x HDD's using LVM on each host node? >> What about RAID 6? >> >> >> >> Virtual Machines will then reside on the oVirt Cluster and any one of >> the 3 host nodes can fail, or any single HDD can fail and all should >> still work, right/? >> >> >> >> >> -- >> Kind Regards >> Rudi Ahlers >> Website: http://www.rudiahlers.co.za >> >> >> _______________________________________________ >> Users mailing list >> Users@ovirt.org >> http://lists.ovirt.org/mailman/listinfo/users > > > > _______________________________________________ > Users mailing list > Users@ovirt.org > http://lists.ovirt.org/mailman/listinfo/users
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