[ovirt-users] Re: Right Glusterfs Config on HA Server

If you need high performance you should consider:- upgrading to RAID10- Move to SAS Spinning disks or to SSDs/NVMEs- or a combination of those (NVMEs for LVM cache + SAS disks in RAID10) Best Regards,Strahil Nikolov On Sun, Feb 28, 2021 at 15:17, Marcel d'Heureuse<marcel(a)deheureu.se> wrote: #yiv4732623807 blockquote.yiv4732623807cite {margin-left:5px;margin-right:0px;padding-left:10px;padding-right:0px;border-left:1px solid #cccccc;}#yiv4732623807 blockquote.yiv4732623807cite2 {margin-left:5px;margin-right:0px;padding-left:10px;padding-right:0px;border-left:1px solid #cccccc;margin-top:3px;padding-top:0px;}#yiv4732623807 a img {border:0px;}#yiv4732623807 Hi Guys or Girls, I have a problem in a productive system. We use three Servers which have a Raid 5 with four Harddrives SATA 8 TB 7200 rpms. The Systems are interconnected for Glusterfs with 1 GB/s. The Network Load between all three servers are between 5 and 8 % of the network. The Glusterfs has a separate VLAN which complete isolated from other networks.  Find attached a small drawing.  On that server we rum as HA and there are 8 VMs installed. Most of the VMs working well but if there is high load on the system some of the VM can't write the Data in a "good" speed on the disks. The Glusterfs is configured as Replica on the Raid5 disk which is as Jbob in Glusterfs defined.  If i take a look on the iostats i can see that the Harddisk have round 50 open connections some of the glusterfs and a lot of the vms.  In side the VMs i can see long iowaiting times from 300 up to 600 ms. With is on case of a Posgresql database very long.  Should we configure the Raid5 controller out that the controller only should 4 disks with 8 TB and Glusterfs should connect directly to the /dev/sd[b-e]?  What do you think? Will SSD HDD will help on performance but the same config with Raid5 and Jbod could be the bigger problem.  ThanksMarcel _______________________________________________ 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/AX2BE7YU5F6...