Hi,
I broke down and spent some $$ on a new server for home use. I mostly do technical research and testing, plus store movies and music. My interests are mainly in the IET iscsitarget performance.
Server system consists of an AMD Phenom II 550, 8GB RAM, 1x 80GB system partition, and a LVM-vg0 software raid5, running Ubuntu 10.04 server x64.
The vg0 consists of 3 x 500GB 7200RPM SATA drives (mdadm) sliced up with 100GB for VBox VMs, one slice is an iscsitarget for a Windows 2k3 server, and another slice iscsitarget for a desktop.
With this setup, the win2k3 server is booted from a .vdi image stored on the ext4 lvm raid5 vg0. Here are the DiskTT stats.
Code:
2.2GB file
Write: 75MB/s
Read: 210MB/s
However, with the Win2k3 server and the MS iscsi initiator I get using DiskTT:
Code:
2.2GB file
Write: 8.2MB per second
Read: 33.7MB per second
The speeds are incredibly slow considering a non iscsi connection is screaming fast in comparison. Any ideas?
All nics are 1GB.
Here is my ietd.conf
Code:
MaxConnections 1 # Number of connections/session
# We only support 1
MaxSessions 0 # Number of sessions/target
# 0 = no explicit limit
InitialR2T Yes # Wait first for R2T
# Yes = no unsolicited data
ImmediateData Yes # Data can accompany command
# Yes = cmnd/data in same PDU
MaxRecvDataSegmentLength 8192 # Max data per PDU to receive
MaxXmitDataSegmentLength 8192 # Max data per PDU to transmit
MaxBurstLength 262144 # Max data per sequence (R2T)
FirstBurstLength 65536 # Max unsolicited data sequence
DefaultTime2Wait 2 # Secs wait for ini to log out
# Not used
#DefaultTime2Retain 20 # Secs keep cmnds after log out
# Not used
#MaxOutstandingR2T 1 # Max outstanding R2Ts per cmnd
#DataPDUInOrder Yes # Data in PDUs is ordered
# We only support ordered
#DataSequenceInOrder Yes # PDUs in sequence are ordered
# We only support ordered
#ErrorRecoveryLevel 0 # We only support level 0
#HeaderDigest None,CRC32C # PDU header checksum algo list
# None or CRC32C
# If only one is set then the
# initiator must agree to it
# or the connection will fail
#DataDigest None,CRC32C # PDU data checksum algo list
# Same as above
#MaxSessions 0 # Maximum number of sessions to
# this target - 0 = unlimited
#NOPInterval 0 # Send a NOP-In ping each after
# that many seconds if the conn
# is otherwise idle - 0 = off
#NOPTimeout 0 # Wait that many seconds for a
# response on a NOP-In ping
# If 0 or > NOPInterval, NOPInterval
# is used!
#
# Various target parameters
#
#Wthreads 8 # Number of IO threads
#QueuedCommands 32 # Number of queued commands
Target iqn.2010-06.lan.local:vg0.iscsi-server
Lun 0 Path=/dev/vg0/iSCSI-Server,Type=fileio
Alias LUN1
#MaxConnections 6
Target iqn.2010-06.lan.local:vg0.iscsi-vista
Lun 0 Path=/dev/vg0/iSCSI-Vista,Type=fileio
Alias LUN1
#MaxConnections 6
