Hello wonderful Proxmox Community,
This question probably had been asked thousand times already, still i am hoping somebody can help me out with the backup speed issue i am having.
Primarily I have been using FreeNAS as shared storage. My backup speed always stayed at 55-60Mib/s. Following are the FreeNAS and Proxmox machine specs i am working with:
Proxmox Host
-------------
CPU: Intel i7-3770
RAM: 32GB
HDD: 60GB SSD
NIC: Intel Pro Gigabit
FreeNAS Node
--------------
CPU: Intel i5-3550
RAM: 28GB
HDD: 2x 2TB Segate HDD , Mirrored ZFS
NIC: Intel Pro Gigabit
In order to make sure FreeNAS was not causing the backup slow down, i setup a OmniOS+Napp-IT box with identical FreeNAS specs. I even backedup directly on to Proxmox host. But the speed was same around 60 MiB/s. The speed did jump to 110+MiB/s first time i setup OmniOS shared storage. But the speed dropped to 60MiB/s again after 3 backups. But here is the interesting part. On the proxmox host, if i turn on Write back=unsafe cache, speed jumps to 115 MIb/s does not matter which shared storage i am backing up to. I understand this is unsafe, but is there a way to disable unsafe cache and still achieve 115MiB/s backup speed? None of the node has any RAID Controller. HDD and SSD connected to standard SATA port.
Thanks for providing any solution you might have!
This question probably had been asked thousand times already, still i am hoping somebody can help me out with the backup speed issue i am having.
Primarily I have been using FreeNAS as shared storage. My backup speed always stayed at 55-60Mib/s. Following are the FreeNAS and Proxmox machine specs i am working with:
Proxmox Host
-------------
CPU: Intel i7-3770
RAM: 32GB
HDD: 60GB SSD
NIC: Intel Pro Gigabit
FreeNAS Node
--------------
CPU: Intel i5-3550
RAM: 28GB
HDD: 2x 2TB Segate HDD , Mirrored ZFS
NIC: Intel Pro Gigabit
In order to make sure FreeNAS was not causing the backup slow down, i setup a OmniOS+Napp-IT box with identical FreeNAS specs. I even backedup directly on to Proxmox host. But the speed was same around 60 MiB/s. The speed did jump to 110+MiB/s first time i setup OmniOS shared storage. But the speed dropped to 60MiB/s again after 3 backups. But here is the interesting part. On the proxmox host, if i turn on Write back=unsafe cache, speed jumps to 115 MIb/s does not matter which shared storage i am backing up to. I understand this is unsafe, but is there a way to disable unsafe cache and still achieve 115MiB/s backup speed? None of the node has any RAID Controller. HDD and SSD connected to standard SATA port.
Thanks for providing any solution you might have!