napp-it ZFS Storage, Руководство пользователя

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21.1 Tuning aspects
- TCP/IP tuning of Server side
This includes send and receive buffers that can be modified on a running system and mtu settings
(Jumboframes, mtu=9000) that require a reboot.
- TCP/IP tuning on switches
you must enable mto=9000 or Jumboframes or the switch blocks Jumboframes
- TCP/IP on client side
This depend on your hardware. For examle with Windows and the mainstream 10G adapter
Intel X540, you should disable interrupt throtteling.
- System and service tuning in /etc/system that require a reboot
like NFS buffers, hotplug behaviour of AHCI Sata, timeout of disks on problems and many other aspects.
- Nic (ex in ixgbe.conf) and vnic (vmxnet3s.conf) settings
These are mainly mtu and buffer settings that should be increased for 10G
- Disk settings in sd.conf
Mainly settings for advanced sector disks, power management and other aspects of disks
- SAS controller settings ex in mpt_sas.conf
Settings like mpio and other controller dependent SAS aspects
- napp-in-one tuning
If you use napp-in one to connect ESXi over the internal vswitch with the ZFS storage VM, all transfers are
in software so most netwok and Ethernet centric tunings aspects are not needed, You should use vmxnet3 as
vnic as it is much faster than the e1000 vnic with the base vmxnet3 tuning. The other tuning aspects are main-
ly relevant for external access or if you use a 10G nic in pass-through mode for fastest external access.
Remarks about napp-in-one tuning (ESXi related aspects)
You mainly use NFS to offer ZFS storage for ESXi. If you modify OmniOS settings like the vmxnet3 settings,
it can happen that you need to reboot OmniOS twice (check console on boot as vmxnet3 settings are displayed
on bootup). Some settings result in an „All Path Down=NFS not availabe„ error in ESXi. You can fix this with an
ESXi reboot. Some NFS service modifications hinder ESXi to reconnect at all. You can fix this when you delete
are VMs from inventory (NOT from disk), delete the NFS mount, readd the NFS mount and reimport the VMs to
inventory (use ESXi filebrowser and a right mouse click on the .vmx file in the VM folder)
Tuning for napp-it Free
You can manually modify system settings via console, Putty or remotly edit files via WinSCP
You can try the settings from the napp-it Pro tuning console
Tuning for napp-it Pro
You can use the tuning console that allows
- enable a basic tuning with the options for an immediate reboot and a BE creation
- use up to ten private editable tuning configurations that can be easily moved to other appliances
Hints about other aspects like SSD, iSCSI settings or Pool considerations
see napp-it menu System > System tuning