High Wait IO after and Load Average upgrade to Proxmox 4

May 17, 2017
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I'm a Systems Architect, and just so we're clear, the chances of losing data by disabling write barriers are close to none. You can forcefully terminate a KVM/LXC/what-have-you upmpteen hundred times before you'll see a barrier related data loss. Personally, I haven't come across one that wasn't related to a different pre-existing issue. Ext3 has barriers disabled by default, however ext4 has them enabled. As for daemons and noatime, that's also pretty unlikely as it's a horrible way to check for states. Using noatime on cPanel, and Ubuntu LAMP stacks has no consequences, only performance improvements. It's a production box, so testing the differences isn't feasible. You can go ahead and let me know the differences :)
 
May 17, 2017
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The '/var/lib/vz' reference was in regards to the pve lv on the host side. The changes were made to the mount options set in /etc/fstab.
 

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