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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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LEARN ABOUT SUNOS

iscsi

iscsi(7D)																 iscsi(7D)

NAME

       iscsi - iSCSI software initiator driver

       The iscsi driver is a software initiator that transports SCSI commands over TCP/IP as described in RFC 3720.  The initiator is administered
       through iscsiadm(1M). The iscsi initiator acts as a host adapter driver that attaches the appropriate target driver (for example sd(7D) for
       disks or st(7D) for tapes) for devices it discovers.  See the System Administration Guide for more information.

       /kernel/drv/iscsi	       32-bit ELF kernel driver.

       /kernel/drv/sparcv9/iscsi       64-bit SPARC ELF kernel driver.

       /kernel/drv/amd64/iscsi	       64-bit AMD64 ELF kernel driver.

       /kernel/drv/iscsi.conf	       Driver configuration file.

       /etc/iscsi/*		       iscsi persistent store.

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWiscsir, SUNWiscsiu	   |
       +-----------------------------+-----------------------------+

       iscsiadm(1M), attributes(5)

       RFC 3720 Internet Small Computer Systems Interface (iSCSI)

       System Administration Guide: Devices and File Systems, Chapter 15

								   12 April 2005							 iscsi(7D)
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