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Re: [Xen-users] flooding kernel.log

  • To: "xen-users@xxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxx>
  • From: Abdallah Jabbour <it-j@xxxxxxxxx>
  • Date: Tue, 24 May 2016 17:16:20 +0000
  • Accept-language: en-US
  • Delivery-date: Tue, 24 May 2016 16:20:08 +0000
  • List-id: Xen user discussion <xen-users.lists.xen.org>
  • Thread-index: AQHRtPg/+TO24+bXfECqkgwOidU+LJ/GwshggAAPuICAAMt9QIAARA0AgAByCAA=
  • Thread-topic: [Xen-users] flooding kernel.log

The iscsi package that solves the problem for meis  : targetcli , all I know 
that those log messages you see in the syslog comes from unsupported commands 
the intiator send to the target , which requires persistent reservation feature 
to be supported  in the iscsi target . I have only experience with CentOS 7 ( 
as the iSCSI target ) and CentOS 7 as KVM or Xen4Centos hypervisor hosts and 
also with VMware ESXi 5 , am sure  Linux LIO target is available in debian and 
Ubuntu distros too .

Abdallah Jabbour
IT Manager
for the real world
Sheikhdaher, Flaifel Brothers Avenue,Bldge No.602 P.O. Box 1133
T:+963 41 466 122/Ext 225  W: www.msc.com
As agent for MSC Mediterranean Shipping Company S.A., Geneva

-----Original Message-----
From: Christian [mailto:chris@xxxxxxxxxxxxxxxx]
Sent: 24 أيار, 2016 02:21 م
To: Abdallah Jabbour <it-j@xxxxxxxxx>
Subject: Re: [Xen-users] flooding kernel.log

Sorry have no idea what 'iscsi' version it supports or not ...
am using 'iscsitarget-dkms' on debian wheezy. Using it on 4 hosts (same soft 
level). The funny thing is ... the log flodding only comes up on 2 hosts (where 
I have 2 targets cause of having two 'vg' (vg0 and vg1) ....
on the other two hosts, where I have only one target (vg0) so in a short 
host3 is using targets from 4, 5 and 6
host4 is using targets from 3, 5 and 6
host5 is using targets from 3, 4 and 6
host6 is using targets from 3, 4 and 5

so iscsi-target and open-iscsi should be 'compatible' right ?
And finally those messages should be on all hosts ... but they are only on 
those hosts with 2 targets ...

I don't see interruptions or timeouts ...

Am 24.05.2016 um 08:23 schrieb Abdallah Jabbour:
> IET support older scsi2 protocol , I had this issue on ESXi 5 which is not 
> compatible with scsi2 and IET , only solution , if you have OpenFiler is to 
> purchase the advanced iscsi target plugin , which support scsi3 and 
> persistent reservation  , or switch to Linux LIO target which supports scsi3 
> and persistent reservation .
> Do you experience disconnection between the storage and the hosts ? if you 
> have heavy loads on the storage then you are going see some disconnections .


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