liukuohao
Dabbler
- Joined
- Jun 27, 2013
- Messages
- 39
Hi All,
FreeNAS Server Hardware Spec:
Motherboard = PDSME
CPU = Pentium D930 3.0GHz dual core 775 socket
RAM = 8GB DDR2 (max.)
NIC = Intel 82573 PCI-E Gigabit Ethernet
OS = FreeNAS v9.1.0 x64
ZFS file system formated
The server is using the motherboard's south bridge ICH7R
as the disk SATA II controller for connecting 4 disks.
Mirror A = 2TB WD20EARX x 2
Mirror B = 2TB WD20EARSX x 2
WD Intelipark = disabled
ZFS raid 10 = Mirror A stripe Mirror B
Total capacity = 3.6TB
ZVOL created
Volume size = 3TB (cannot set higher)
Compression Level = Off
Block Size = 4,096 bytes
iSCSI extend device (not file) created
iSCSI initiator created
iSCSI portal added
iSCSI target created, Logical Block Size = 4096 bytes
Extend associated with target.
Windows 7 Client PC
Windows 7 Ultimate 64bit client PC can connect to FreeNAS server's iSCSI target successfully.
Windows 7 Ultimate 64bit client PC connected to FreeNAS server using a dedicated network,
separate gigabit switch and network cables.
Windows 7 Ultimate 64bit client PC's 3rd party virus scanner and firewall is disabled. But by default
Windows 7 built-in firewall is activated automatically when 3rd party firewall is disabled.
Windows 7 Ultimate client PC is using Atheros L1 Gigabit Ethernet.
Atheros L1 Gigabit Ethernet
Device Manager- Network adapters- Advanced- Property:
Flow Control = ON
Interrupt Moderation = ON
Max IRQ per Second = 5000
Maximum Frame Size = 1514
Media Type = Auto
Network Address = Not Present
Number of Receive Buffers = 256
Number of Transmit Buffers = 256
Power Saving Mode = Off
Shutdown wake up = Off
Sleep Speed down to 10M = On
Task Offload = On
Wake Up Capabilities = None
Below is the result that I have screen captured.
As you can see the Write(sequential) speed demonstrated on CrystalDiskMark = approx. 39MB/s.
I cannot complain about the Read(sequential) speed = 92MB/s
The Writes connection seems very choppy, unsteady (show in the vertical green lines) according to the Bandwidth Monitor.
RAM usage for FreeNAS during the Write operation is approx. 5GB on average as you can see on the
physical memory utilization diagram below.
Question:
Does having a higher capacity of RAM, say about 16GB of RAM improves
the writing speed to perhaps 80MB/s?
Your advice is much appreciated here.
Thank you.
FreeNAS Server Hardware Spec:
Motherboard = PDSME
CPU = Pentium D930 3.0GHz dual core 775 socket
RAM = 8GB DDR2 (max.)
NIC = Intel 82573 PCI-E Gigabit Ethernet
OS = FreeNAS v9.1.0 x64
ZFS file system formated
The server is using the motherboard's south bridge ICH7R
as the disk SATA II controller for connecting 4 disks.
Mirror A = 2TB WD20EARX x 2
Mirror B = 2TB WD20EARSX x 2
WD Intelipark = disabled
ZFS raid 10 = Mirror A stripe Mirror B
Total capacity = 3.6TB
ZVOL created
Volume size = 3TB (cannot set higher)
Compression Level = Off
Block Size = 4,096 bytes
iSCSI extend device (not file) created
iSCSI initiator created
iSCSI portal added
iSCSI target created, Logical Block Size = 4096 bytes
Extend associated with target.
Windows 7 Client PC
Windows 7 Ultimate 64bit client PC can connect to FreeNAS server's iSCSI target successfully.
Windows 7 Ultimate 64bit client PC connected to FreeNAS server using a dedicated network,
separate gigabit switch and network cables.
Windows 7 Ultimate 64bit client PC's 3rd party virus scanner and firewall is disabled. But by default
Windows 7 built-in firewall is activated automatically when 3rd party firewall is disabled.
Windows 7 Ultimate client PC is using Atheros L1 Gigabit Ethernet.
Atheros L1 Gigabit Ethernet
Device Manager- Network adapters- Advanced- Property:
Flow Control = ON
Interrupt Moderation = ON
Max IRQ per Second = 5000
Maximum Frame Size = 1514
Media Type = Auto
Network Address = Not Present
Number of Receive Buffers = 256
Number of Transmit Buffers = 256
Power Saving Mode = Off
Shutdown wake up = Off
Sleep Speed down to 10M = On
Task Offload = On
Wake Up Capabilities = None
Below is the result that I have screen captured.
As you can see the Write(sequential) speed demonstrated on CrystalDiskMark = approx. 39MB/s.
I cannot complain about the Read(sequential) speed = 92MB/s
The Writes connection seems very choppy, unsteady (show in the vertical green lines) according to the Bandwidth Monitor.
RAM usage for FreeNAS during the Write operation is approx. 5GB on average as you can see on the
physical memory utilization diagram below.
Question:
Does having a higher capacity of RAM, say about 16GB of RAM improves
the writing speed to perhaps 80MB/s?
Your advice is much appreciated here.
Thank you.