Heres a sample how it looks like when Hit Kit is working (which whould
boost your SAN Performance dramatically).
root@xxx ~]$ iscsiadm -m session -P3
iSCSI Transport Class version 2.0-870
version 6.2.0-873.10.el6
Target: iqn.2001-05.com.equallogic:4-52aed6-f71e0d568-d80000000144f353-xxxx
Current Portal: 192.168.xx106:3260,1
Persistent Portal: 192.168.xx100:3260,1
**********
Interface:
**********
Iface Name: eql.p3p2
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:11b76f936ab4
Iface IPaddress: 192.168.xx201
Iface HWaddress: <empty>
Iface Netdev: p3p2
SID: 1030
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
*********
Timeouts:
*********
Recovery Timeout: 15
Target Reset Timeout: 30
LUN Reset Timeout: 30
Abort Timeout: 15
*****
CHAP:
*****
username: <empty>
password: ********
username_in: <empty>
password_in: ********
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 65536
MaxXmitDataSegmentLength: 65536
FirstBurstLength: 65536
MaxBurstLength: 262144
ImmediateData: Yes
InitialR2T: No
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 1030 State: running
scsi1030 Channel 00 Id 0 Lun: 0
Attached scsi disk sde State: running
Current Portal: 192.168.xx103:3260,1
Persistent Portal: 192.168.xx100:3260,1
**********
Interface:
**********
Iface Name: eql.p3p1
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:11b76f936ab4
Iface IPaddress: 192.168.xx200
Iface HWaddress: <empty>
Iface Netdev: p3p1
SID: 1031
iSCSI Connection State: LOGGED IN
iSCSI Session State: LOGGED_IN
Internal iscsid Session State: NO CHANGE
*********
Timeouts:
*********
Recovery Timeout: 15
Target Reset Timeout: 30
LUN Reset Timeout: 30
Abort Timeout: 15
*****
CHAP:
*****
username: <empty>
password: ********
username_in: <empty>
password_in: ********
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 65536
MaxXmitDataSegmentLength: 65536
FirstBurstLength: 65536
MaxBurstLength: 262144
ImmediateData: Yes
InitialR2T: No
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 1031 State: running
scsi1031 Channel 00 Id 0 Lun: 0
Attached scsi disk sdg State: running
Current Portal: 192.168.xx101:3260,1
and so on, multipathing is the Point. But different than with other SAN,
since the EQL use a Gate IP which redirects you to one of the other IPs
ehcmcli -d
Warning: Legacy syntax detected! Please use the new format of the command:
>> ehcmcli status
Generating diagnostic data, please wait...
========================================================
Adapter List
========================================================
Name: p3p1
IP Address: 192.168.
HW addr: 90:E2:BA:06:
Name: p3p2
IP Address: 192.168.
HW addr: 90:E2:BA:06:
Name: p3p3
IP Address: 192.168.
HW addr: 90:E2:BA:06:
Name: p3p4
IP Address: 192.168.
========================================================
Volume list
========================================================
Volume: someonesvolume
Target name: iqn.2001-05.com.equ
Device to mount: /dev/eql/yep-a-volume
Status: Normal
Session: 986 /dev/sdf 192.168.xx200 -> 192.168.xx102 8d 02:41:53
Session: 1032 /dev/sdh 192.168.xx201 -> 192.168.xx101 01:42:53
Session: 1030 /dev/sde 192.168.xx201 -> 192.168.xx106 01:42:53
Session: 1031 /dev/sdg 192.168.xx200 -> 192.168.xx103 01:42:53
Session: 1033 /dev/sdi 192.168.xx202 -> 192.168.xx112 01:42:53
Session: 1034 /dev/sdj 192.168.xx203 -> 192.168.xx108 01:42:53
========================================================
Summary
========================================================
Adapters: 4
Managed Volumes: 1
iSCSI Sessions: 6
Errors: 0
Warnings: 0
Suggestions: 0
get Hit Kit Installed, and than try again. If this is not possible you
should at least set some of the recommended EQL Settings
ethtool --offload yournic gro off
ethtool --pause yournic autoneg off rx on tx on
iscsid.conf
-- snip --
grep '#' /etc/iscsi/iscsid.conf
node.session.timeo.replacement_timeout = 15
node.conn[0].timeo.login_timeout = 15
node.conn[0].timeo.logout_timeout = 15
node.conn[0].timeo.noop_out_interval = 5
node.conn[0].timeo.noop_out_timeout = 5
node.session.err_timeo.abort_timeout = 15
node.session.err_timeo.lu_reset_timeout = 15
node.session.err_timeo.tgt_reset_timeout = 5
node.session.initial_login_retry_max = 60
node.session.cmds_max = 1024
node.session.queue_depth = 128
node.session.xmit_thread_priority = -20
node.session.iscsi.InitialR2T = No
node.session.iscsi.ImmediateData = Yes
node.session.iscsi.FirstBurstLength = 262144
node.session.iscsi.MaxBurstLength = 16776192
node.conn[0].iscsi.MaxRecvDataSegmentLength = 262144
node.conn[0].iscsi.MaxXmitDataSegmentLength = 0
discovery.sendtargets.iscsi.MaxRecvDataSegmentLength = 32768
node.conn[0].iscsi.HeaderDigest = None
node.session.nr_sessions = 4
node.session.iscsi.FastAbort = No
-- snip --
Switch Configuration is also essential... which Switch is in use here?
Am 02.12.2014 um 15:41 schrieb Stefan B:
> bash-4.3# iscsiadm -m session -P3
> iSCSI Transport Class version 2.0-870
> version 2.0-872
> Target: iqn.2001-05.com.equallogic:0-8a0906-6c5f17a03-1244d61b0964922b-srv2
> Current Portal: 192.3.168.39:3260,1
> Persistent Portal: 192.3.168.25:3260,1
> **********
> Interface:
> **********
> Iface Name: default
> Iface Transport: tcp
> Iface Initiatorname: iqn.2005-03.org.open-iscsi:17bf658bc39
> Iface IPaddress: 192.3.168.51
> Iface HWaddress: default
> Iface Netdev: default
> SID: 1
> iSCSI Connection State: LOGGED IN
> iSCSI Session State: LOGGED_IN
> Internal iscsid Session State: NO CHANGE
> ************************
> Negotiated iSCSI params:
> ************************
> HeaderDigest: None
> DataDigest: None
> MaxRecvDataSegmentLength: 131072
> MaxXmitDataSegmentLength: 65536
> FirstBurstLength: 65536
> MaxBurstLength: 262144
> ImmediateData: Yes
> InitialR2T: No
> MaxOutstandingR2T: 1
> ************************
> Attached SCSI devices:
> ************************
> Host Number: 7 State: running
> scsi7 Channel 00 Id 0 Lun: 0
>
> We have not the Hit Kit installed on the Servers. We use Jumbo frames on
> the switches thats work, but flowcontrol dont work with the switch in
> the Dell Bladecenter.
>
> We use the default mount point
> /dev/sde on /home type xfs (rw)
>
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