Le mardi 12 mars 2013 23:30:47 UTC+1, Mike Christie a écrit :
On 03/12/2013 08:11 AM, Guillaume wrote:
Hello Mike
On 12 mar, 02:54, Mike Christie micha...@cs.wisc.edu wrote:
On 03/09/2013 05:58 AM, Guillaume wrote:
Hello,
I have a virtual tape library and a iscsi SAN.
Le mercredi 13 mars 2013 15:44:04 UTC+1, hare a écrit :
On 03/12/2013 11:30 PM, Mike Christie wrote:
On 03/12/2013 08:11 AM, Guillaume wrote:
Hello Mike
On 12 mar, 02:54, Mike Christie micha...@cs.wisc.edu wrote:
On 03/09/2013 05:58 AM, Guillaume wrote:
Hello,
I have
On 03/12/2013 11:30 PM, Mike Christie wrote:
On 03/12/2013 08:11 AM, Guillaume wrote:
Hello Mike
On 12 mar, 02:54, Mike Christie micha...@cs.wisc.edu wrote:
On 03/09/2013 05:58 AM, Guillaume wrote:
Hello,
I have a virtual tape library and a iscsi SAN. All have multiple
ethernet
Hello Mike
On 12 mar, 02:54, Mike Christie micha...@cs.wisc.edu wrote:
On 03/09/2013 05:58 AM, Guillaume wrote:
Hello,
I have a virtual tape library and a iscsi SAN. All have multiple
ethernet interfaces, This will ressult in multiples sessions to the
targets.So I wonder if I must use
On 03/12/2013 08:11 AM, Guillaume wrote:
Hello Mike
On 12 mar, 02:54, Mike Christie micha...@cs.wisc.edu wrote:
On 03/09/2013 05:58 AM, Guillaume wrote:
Hello,
I have a virtual tape library and a iscsi SAN. All have multiple
ethernet interfaces, This will ressult in multiples sessions to
I have a virtual tape library and a iscsi SAN. All have multiple
ethernet interfaces, This will ressult in multiples sessions to the
targets.So I wonder if I must use dm-multipath or not ? Does the
Typically I only use multipath if I have one initiator talking to one
target. Otherwise I just
The iSCSI layer doesn't do MPIO, it's done at the host level. Depending
on the tape system, you could benefit performance wise using MPIO.
Open-iSCSI can be configured to initiate multiple sessions to a single
target. Once those volumes are presented to the host, having the same
Serial number,
Hello,
If I want to use 802.3ad I must have multiple links to the same switch. For
redundancy purposes, each host is connected to two separated networks (like
a dual fabric in FC).
Regards,
Guillaume
Le dimanche 10 mars 2013 03:07:01 UTC+1, Mark Lehrer a écrit :
I have a virtual tape
On 03/09/2013 05:58 AM, Guillaume wrote:
Hello,
I have a virtual tape library and a iscsi SAN. All have multiple
ethernet interfaces, This will ressult in multiples sessions to the
targets.So I wonder if I must use dm-multipath or not ? Does the current
Does the device show up as a tape
On 05/20/2011 10:29 AM, --[ UxBoD ]-- wrote:
Not sure where this should go so cross posting:
CentOS 5.6 with kernel 2.6.37.6 and device-mapper-multipath-0.4.7-42.el5_6.2.
When I run multipath -v9 -d I get:
I think you need to post to the dm devel list. I do not see any iscsi
issues in
- Original Message -
On 05/20/2011 10:29 AM, --[ UxBoD ]-- wrote:
Not sure where this should go so cross posting:
CentOS 5.6 with kernel 2.6.37.6 and
device-mapper-multipath-0.4.7-42.el5_6.2.
When I run multipath -v9 -d I get:
I think you need to post to the dm devel
On 05/20/2011 10:45 AM, --[ UxBoD ]-- wrote:
- Original Message -
On 05/20/2011 10:29 AM, --[ UxBoD ]-- wrote:
Not sure where this should go so cross posting:
CentOS 5.6 with kernel 2.6.37.6 and
device-mapper-multipath-0.4.7-42.el5_6.2.
When I run multipath -v9 -d I get:
I think
On 05/20/2011 10:45 AM, --[ UxBoD ]-- wrote:
- Original Message -
On 05/20/2011 10:29 AM, --[ UxBoD ]-- wrote:
Not sure where this should go so cross posting:
CentOS 5.6 with kernel 2.6.37.6 and
device-mapper-multipath-0.4.7-42.el5_6.2.
When I run multipath -v9 -d I get:
I think
- Original Message -
On 05/20/2011 10:45 AM, --[ UxBoD ]-- wrote:
- Original Message -
On 05/20/2011 10:29 AM, --[ UxBoD ]-- wrote:
Not sure where this should go so cross posting:
CentOS 5.6 with kernel 2.6.37.6 and
device-mapper-multipath-0.4.7-42.el5_6.2.
When I
mala...@us.ibm.com wrote:
Hi all,
I am trying to install RHEL5.3 on an iSCSI disk with two paths.
I booted with mapth option but the installer picked up only a single
path. Is this the expected behavior when I use iBFT?
The install went fine on a single path. I was trying to convert
On 16 Apr 2009 at 13:59, jnantel wrote:
FINAL RESULTS *
First of all I'd thank Mike Christie for all his help. Mike I'll
tapping your brain again for some read performance help.
This for the benefit of anyone using the Dell Equallogic PS5000XV
PS5000E with SLES10 SP2 / Redhat
Accross my SAN, tuned system:
ping -I eth2 -s 9000 10.1.253.48
PING 10.1.253.48 (10.1.253.48) from 10.1.253.48 eth2: 9000(9028) bytes
of data.
9008 bytes from 10.1.253.48: icmp_seq=1 ttl=64 time=0.074 ms
9008 bytes from 10.1.253.48: icmp_seq=2 ttl=64 time=0.013 ms
9008 bytes from 10.1.253.48:
FINAL RESULTS *
First of all I'd thank Mike Christie for all his help. Mike I'll
tapping your brain again for some read performance help.
This for the benefit of anyone using the Dell Equallogic PS5000XV
PS5000E with SLES10 SP2 / Redhat 5.3 / Centos 5.3 / Oracle Linux +
Multipath ( MPIO
On Mon, Apr 13, 2009 at 10:33 PM, Mike Christie micha...@cs.wisc.edu wrote:
I think linux is just not so good with smaller IO sizes like 4K. I do
not see good performance with Fibre Channel or iscsi.
Most people run a filesystem on top of a block device imported via
open-iscsi. It is well
On Mon, Apr 13, 2009 at 10:33 PM, Mike Christie micha...@cs.wisc.edu wrote:
I think linux is just not so good with smaller IO sizes like 4K. I do
not see good performance with Fibre Channel or iscsi.
Can you elaborate on the above ? I have already measured a throughput
of more than 60 MB/s
Well I've got some disconcerting news on this issue. No changes at
any level alter the 34/meg throughput I get. I flushed multipath, blew
away /var/lib/iscsi just in case. I also verified in /var/lib/iscsi
the options got set. RHEL53 took my renice no problem.
Some observations:
Single
Bart Van Assche wrote:
On Mon, Apr 13, 2009 at 10:33 PM, Mike Christie micha...@cs.wisc.edu wrote:
I think linux is just not so good with smaller IO sizes like 4K. I do
not see good performance with Fibre Channel or iscsi.
Can you elaborate on the above ? I have already measured a
jnantel wrote:
Well I've got some disconcerting news on this issue. No changes at
any level alter the 34/meg throughput I get. I flushed multipath, blew
away /var/lib/iscsi just in case. I also verified in /var/lib/iscsi
the options got set. RHEL53 took my renice no problem.
What were
iometer 32k write 0 read 0 randoms Equallogic is using this in their
lab
iozone with -I option and various settings
dd + iostat
On Apr 14, 1:57 pm, Mike Christie micha...@cs.wisc.edu wrote:
Bart Van Assche wrote:
On Mon, Apr 13, 2009 at 10:33 PM, Mike Christie micha...@cs.wisc.edu
wrote:
jnantel wrote:
I am having a major issue with multipath + iscsi write performance
with anything random or any sequential write with data sizes smaller
than 4meg (128k 64k 32k 16k 8k). With 32k block size, I am able to
get a maximum throughput of 33meg/s write. My performance gets cut
Mike Christie wrote:
mala...@us.ibm.com wrote:
Hi all,
I am trying to install RHEL5.3 on an iSCSI disk with two paths.
I booted with mapth option but the installer picked up only a
single
path. Is this the expected behavior when I use iBFT?
For this mail ibft boot means the boot
mala...@us.ibm.com wrote:
Mike Christie [micha...@cs.wisc.edu] wrote:
If the ibft implementation uses one session, but exports all the
targets in the ibft info, then in RHEL 5.3 the installer only picks
up
the session used for the ibft boot up, but the initrd root-boot code
used after the
shyam_i...@dell.com wrote:
Mike Christie wrote:
mala...@us.ibm.com wrote:
Hi all,
I am trying to install RHEL5.3 on an iSCSI disk with two paths.
I booted with mapth option but the installer picked up only a
single
path. Is this the expected behavior when I use iBFT?
For this
Mike Christie wrote:
That is what I said in the mail you replied to more or less. For boot
it is fixed. iscsiadm/iscsistart logs into all the targets found in ibft
whehter
they were used for the ibft boot or not. For install there is a bug
still, because the isntaller code used the wrong API
On Wed, Apr 1, 2009 at 6:42 PM, Pasi Kärkkäinen pa...@iki.fi wrote:
On Wed, Apr 01, 2009 at 05:13:10AM -0700, mala...@us.ibm.com wrote:
Hi all,
I am trying to install RHEL5.3 on an iSCSI disk with two paths.
I booted with mapth option but the installer picked up only a single
Hi Malahal.
There is a BZ for SLES.
https://bugzilla.novell.com/show_bug.cgi?id=436463 I, too, have not been
able to get RHEL 5.3 to install either.
Regards,
Wayne.
-Original Message-
From: open-iscsi@googlegroups.com [mailto:open-is...@googlegroups.com]
On Behalf Of
mala...@us.ibm.com wrote:
Hi all,
I am trying to install RHEL5.3 on an iSCSI disk with two paths.
I booted with mapth option but the installer picked up only a single
path. Is this the expected behavior when I use iBFT?
For this mail ibft boot means the boot process where the ibft
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