Open-E DSS V6 MPIO with
XenServer 5.6
Software Version: DSS ver. 6.00 up55
Presentation updated: December 2010
Multipath I/O on DSS V6 with XenServer
Example configuration of Multipath I/O on DSS V6 with Citrix XenServer and VM-Windows 2008
Hardware Requirements:
To run the Multipath I/O on DSS V6 with Citrix XenServer and Windows 2008 server running as virtual machine, a minimum of two
network cards in both systems are required.
LAN
Citrix XenServer with
Windows 2008 Server as
virtual machine.
Virtual-IP: 192.168.0.70
Switch
DSS V6 ; iSCSI Targets:
iqn.2010-12:dss230.xen
iqn.2010-11:dss230.win2008
IP:192.168.0.230 eth0 (used for the MPIO)
IP:192.168.0.7 (MPIO)
IP:192.168.1.230 eth1 (used for the MPIO)
IP:192.168.1.7 (MPIO)
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Configure the DSS V6
In order to verify proper NICs settings,
go to menu: „STATUS” tab, „network”
and Interfaces.
Two NICs to be used for MPIO has IP
address:
192.168.2.220
192.168.3.220
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Configure the DSS V6
Next, please go to menu:
„CONFIGURATION” tab, „volume
manager” and Vol. groups.
Select eth0 interface and in Volume
manager, create two Block-IO or FileIO iSCSI volumes.
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Configure the DSS V6
In menu: „CONFIGURATION” tab,
„iSCSI target manager”, Targets,
please uncheck the Target Default
Name and enter target name:
iqn.2010-12:dss.xen
Then the second one:
iqn.2010-12:dss.win2008
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Configure the DSS V6
In menu „CONFIGURATION” tab,
„iSCSI target manager”, Targets,
select first alias: target0 and click on
the
button.
Then select the second alias: target1
and click on the
button.
Now, configuring DSS V6 is finished.
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Configure XenServer
Navigate in the XenCenter and
click on „Add New Server”.
Step 1
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Configure MPIO on XenServer
Enter Maintenance Mode
Step 2
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Configure MPIO on XenServer
In the Maintenance Mode in
General tab please click on the
„Properties” button.
Step 3
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Configure MPIO on XenServer
In the Multipathing section click on
the „Enable multipathing on this
server” and the „OK” to
Step 4
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Configure MPIO on XenServer
Exit Maintenance Mode
Step 5
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Configure MPIO on XenServer
Navigate to the Network tab and
click on „Configure …” button.
Step 6
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Configure MPIO on XenServer
Step 7
In „Management Interfaces”
menu, please click on „New
Interface” button.
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Configure MPIO on XenServer
Step 8
Next, please enter IP address and
Subnet mask and click on the „OK”
button.
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Configure MPIO on XenServer
Step 9
In the „Management Interfaces”
section there are two interfaces
configured.
In this example:
192.168.0.7
192.168.1.7
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Configure MPIO on XenServer
Next, in the „Storage” tab click
on „New SR ...” button.
Step 10
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Configure MPIO on XenServer
Now, select the „Software iSCSI ”
and click on the „Next >” button.
Step 11
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Configure MPIO on XenServer
In the Target Hosts field please
enter IP addresses of both iSCSI
targets and click on the „Discover
IQNs” button.
Step 12
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Configure MPIO on XenServer
Now, please select the target
showing on the first NIC
iqn.2010-12:dss.xen
(192.168.0.230).
Step 13
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Configure MPIO on XenServer
Next, please click „Discover
LUNs” button and select the LUN.
Step 14
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Configure MPIO on XenServer
In the „Storage” tab, new “iSCSI
virtual disk storage” appear.
Step 15
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Configure MPIO on XenServer
In order to check Multipath settings,
please select the “iSCSI virtual disk
storage” and in the “General” tab
Multipathing section must show “2
of 2 paths active”.
Step 16
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Using XenServer CLI
[root@xenserver-demo /]# nano /etc/multipath.conf
...
defaults {
#
udev_dir
/dev
#
polling_interval
10
selector
"round-robin 0"
path_grouping_policy
multibus
#
getuid_callout
"/sbin/scsi_id -g -u -s /block/%n"
#
prio_callout
/bin/true
#
path_checker
readsector0
rr_min_io
6
#
max_fds
8192
#
rr_weight
priorities
#
failback
immediate
#
no_path_retry
fail
#
user_friendly_names
yes
}
In the green lines please remove the leading # and enter In order to save and exit use ctrl-x -> y -> enter to confirm
[root@xenserver-demo /]# multipath –v5
[root@xenserver-demo /]# multipath –ll
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Using XenServer CLI – edit /etc/multipath.conf
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Using XenServer CLI
In order to check
the settings, please
run the list
command:
Miltipath -ll
Now, the minio
parameter is
changed to 6 and
pgpolicy = multibus
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Configure MPIO on XenServer
Now install the Windows 2008 virtual machine on the new
added iSCSI Virtual disk storage and run Iometer in
order to check the performance.
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Multipath I/O on DSS V6 with XenServer
Step 17
Verify the performance with
„Iometer” running on
Now you have completed the configuration of Multipath I/O on DSS V6 with XenServer.
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Thank you!
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