Sponsored Content
Operating Systems AIX ISCSI poor performance 1.5MB/s fresh install AIX7.1 Post 302977139 by hicksd8 on Wednesday 13th of July 2016 06:52:03 AM
Old 07-13-2016
iSCSI performance can be greatly affected by a number of factors.

One of the major ones is the maximum payload configured. Turning on jumbo packets if both adapters support it is usually a good start.

There are other BIOS settings on FC adapters that also affect performance.
What adapters are you using?

Also, there may be the usual I/O system settings of write-thru vs write-back to consider.

A quick search of the IBM bible yielded this:
IBM Knowledge Center Error
 

9 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Samba on E3500 Poor Performance!!!

Hi you all, I have a BIG performance problem on an Sun E3500, the scenario is described below: I have several users (30) accessing via samba to the E3500 using an application built on Visual Foxpro from their Windows PC , the problem is that the first guy that logs in demands 30% of the E3500... (2 Replies)
Discussion started by: alex blanco
2 Replies

2. Filesystems, Disks and Memory

Poor read performance on sun storedge a1000

Hello, i have a a1000 connected to an e6500. There's a raid 10 (12 disks) on the a1000. If i do a dd if=/dev/zero of=/mnt/1 bs=1024k count=1000 and then look at iostat it tells me there's a kw/s of 25000. But if i do a dd of=/dev/zero if=/mnt/1 bs=1024k count=1000 then i see only a... (1 Reply)
Discussion started by: mbrenner
1 Replies

3. UNIX for Dummies Questions & Answers

poor performance processing file with awk

Hello, I'm running a script on AIX to process lines in a file. I need to enclose the second column in quotation marks and write each line to a new file. I've come up with the following: #!/bin/ksh filename=$1 exec >> $filename.new cat $filename | while read LINE do echo $LINE | awk... (2 Replies)
Discussion started by: scooter53080
2 Replies

4. UNIX for Advanced & Expert Users

HW Raid poor io performance

Hello all We just built a storage cluster for our new xenserver farm. Using 3ware 9650SE raid controllers with 8 x 1TB WD sata disks in a raid 5, 256KB stripe size. While making first performance test on the local storage server using dd (which simulates the read/write access to the disk... (1 Reply)
Discussion started by: roli8200
1 Replies

5. Solaris

Poor Disk performance on ZFS

Hello, we have a machine with Solaris Express 11, 2 LSI 9211 8i SAS 2 controllers (multipath to disks), multiport backplane, 16 Seagate Cheetah 15K RPM disks. Each disk has a sequential performance of 220/230 MB/s and in fact if I do a dd if=/dev/zero of=/dev/rdsk/<diskID_1> bs=1024k... (1 Reply)
Discussion started by: golemico
1 Replies

6. Solaris

Poor disk performance however no sign of failure

Hello guys, I have two servers performing the same disk operations. I believe one server is having a disk's impending failure however I have no hard evidence to prove it. This is a pair of Netra 210's with 2 drives in a hardware raid mirror (LSI raid controller). While performing intensive... (4 Replies)
Discussion started by: s ladd
4 Replies

7. AIX

Poor Performance of server

Hi, I am new registered user here in this UNIX forums. I am a new system administrator for AIX 6.1. One of our servers performs poorly every time our application (FINACLE) runs many processes/instances. (see below for topas snapshot) I use NMON or Topas to monitor the server utilization. I... (9 Replies)
Discussion started by: guzzelle
9 Replies

8. Solaris

Poor performance on an M3000

Hi We have an M3000 single physical processor and 8gb of memory running Solaris 10. This system runs two Oracle Databases one on Oracle 9i and One on Oracle 10g. As soon as the Oracle 10g database starts we see an immediate drop in system performance, for example opening an ssh session can... (6 Replies)
Discussion started by: gregsih
6 Replies

9. Windows & DOS: Issues & Discussions

Poor Windows 10 Performance of Parallels Desktop 15 on macOS Catalina

Just a quick note for macOS users. I just installed (and removed) Parallels Desktop 15 Edition on my MacPro (2013) with 64GB memory and 12-cores, which is running the latest version of macOS Catalina as of this post. The reason for this install was to test some RIGOL test gear software which... (6 Replies)
Discussion started by: Neo
6 Replies
ISCSI_INITIATOR(4)					   BSD Kernel Interfaces Manual 					ISCSI_INITIATOR(4)

NAME
iscsi_initiator -- kernel driver for the iSCSI protocol SYNOPSIS
To compile this driver into the kernel, place the following lines in your kernel configuration file: device iscsi_initiator Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): iscsi_initiator_load="YES" DESCRIPTION
The iscsi_initiator implements the kernel side of the Internet SCSI (iSCSI) network protocol standard. The userland companion is iscontrol(8), and permits access to remote virtual SCSI devices via cam(4). SYSCTL VARIABLES
debug.iscsi_initiator set the debug-level, 0 means no debugging, 9 for maximum. net.iscsi.isid the initiator part of the Session Identifier. The following are informative only: net.iscsi.driver_version the current version of the driver. net.iscsi.sessions the number of current active sessions. net.iscsi.n.targetname the target name of session n. net.iscsi.n.targedaddress the IP address of the target of session n. net.iscsi.n.stats statistics for session net.iscsi.n.pid the process id of the userland side of session n, see iscontrol(8). FILES
The iscsi_initiator driver creates the following: /dev/iscsi used to create new sessions. /dev/iscsi%d for each new session. SEE ALSO
cam(4), camcontrol(8), iscontrol(8) STANDARDS
iSCSI RFC 3720 BUGS
The lun discovery method is old-fashioned. BSD
May 9, 2010 BSD
All times are GMT -4. The time now is 11:02 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy