dambrosioj
Dabbler
- Joined
- Apr 1, 2015
- Messages
- 23
So I have been using FreeNAS now for a couple years and everything has been great, but I recently bought a Dell R710 Server to use ESXi on. I got everything setup and I have iSCSI for the datastore for the VM's, but the problem is the transfer speed while using FreeNAS is really strange. I am on 10GBe, and the transfer of a large file will start out around 600/Mb's a second and thats great, but about halfway through the transfer of the file it always dies and transfers the rest around 70mb/s. I have no idea why this is happening.
I wasnt sure if I needed to add more RAM or create a SLOG? Before I did anything I figured I would ask the experts. Below is my configuration:
FreeNAS:
i3
16GB EEC RAM
6x7200 RPM Seagate Drives in RaidZ2
Two Mellanox 10GBe cards (1 for iSCSI, 1 for CIFS/NFS transfers) both mounted into ESXi
mtu set to 9000
ESXi:
Dell R710
Two Mellanox 10GBe cards directly connected to FreeNAS
Mtu set to 9000
64Gb Ram
Two 6-Core Xenons
I have my VM's running off iSCSI datastore, when i transfer something from SMB or NFS to a share on FreeNAS it transfers around 300mb/s steady. But when i transfer from the SMB to NFS to the VM that is where the issue happens. It starts around 600/Mb/s then just dies to 70mb/s
Can anyone point me to what I am doing wrong, I read that since im not maxed out on ram that L2ARC probably would just hurt things.
I wasnt sure if I needed to add more RAM or create a SLOG? Before I did anything I figured I would ask the experts. Below is my configuration:
FreeNAS:
i3
16GB EEC RAM
6x7200 RPM Seagate Drives in RaidZ2
Two Mellanox 10GBe cards (1 for iSCSI, 1 for CIFS/NFS transfers) both mounted into ESXi
mtu set to 9000
ESXi:
Dell R710
Two Mellanox 10GBe cards directly connected to FreeNAS
Mtu set to 9000
64Gb Ram
Two 6-Core Xenons
I have my VM's running off iSCSI datastore, when i transfer something from SMB or NFS to a share on FreeNAS it transfers around 300mb/s steady. But when i transfer from the SMB to NFS to the VM that is where the issue happens. It starts around 600/Mb/s then just dies to 70mb/s
Can anyone point me to what I am doing wrong, I read that since im not maxed out on ram that L2ARC probably would just hurt things.