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Full Discussion: iSCSI speed problems
Top Forums UNIX for Advanced & Expert Users iSCSI speed problems Post 302205809 by jeriryan87 on Monday 16th of June 2008 10:33:20 AM
Old 06-16-2008
iSCSI speed problems

Hi all. I was able to set up an IBM Ultrium LTO 4 tape drive to use iSCSI (using open-iscsi drivers) to communicate with Red Hat, but it's going really slow, maxing out in tar and dd tests at like 16 MB/s (using a block size of 128k). The thing is rated for 30MB/s. I feel like even though I have a Gigabit ethernet setup, its only utilizing 100MBit. I have no idea how to mess with network settings either in Red Hat or open-iscsi. Any ideas on what to do, either network or otherwise?

Last edited by jeriryan87; 06-16-2008 at 03:14 PM..
 

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ISCSI.CONF(5)							File Formats Manual						     ISCSI.CONF(5)

NAME
iscsi.conf - iSCSI Target and LUN configuration SYNOPSIS
/etc/iscsi.conf DESCRIPTION
This manual page describes the format of the /etc/iscsi.conf file. This file is a simple text file that iscsid(8) uses to locate iSCSI tar- get devices and LUNs. Comments are marked by lines beginning with '#'. Available entries include: DiscoveryAddress=<address> IP address or hostname to use for target discovery. A TCP port number may be specified by appending a colon followed by the port number. This entry must start in the first column, and must not contain any whitespace. TargetIpAddr=<address> A synonym for DiscoveryAddress. Username=<user> Specify the authentication user. If this entry precedes all DiscoveryAddress entries, it serves as the default. If this entry is indented under a DiscoveryAddress entry, it specifies the user for all targets discovered at that IP address. Password=<pass> Specify the authentication password for the previously listed iSCSI If this entry precedes all DiscoveryAddress entries, it serves as the default. If this entry is indented under a DiscoveryAddress entry, it specifies the user for all targets discovered at that IP address. EXAMPLE
# set the default user and password Username=alice Password=nty57nbe # targets at this address will use the default Username and Password DiscoveryAddress=192.168.10.94 # targets at this address will use the Username and Password below DiscoveryAddress=192.168.10.95 Username=beatrice Password=93fdgc20 NOTES
The iSCSI initiator drivers, README files, and example configuration files are available on the Linux-iSCSI homepage at: http://linux-iscsi.sourceforge.com <http://linux-iscsi.sourceforge.com> FILES
/etc/iscsi.conf iSCSI Target and LUN configuration SEE ALSO
iscsid(8) $Revision: 1.9 $ $Date: 2002/09/19 20:00:32 $ ISCSI.CONF(5)
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