Hi...
> Is /apoio04/b1 a scsi/iscsi disk or is it LVM/DM/RAID on top of a
> iscsi/scsi disk?
/apoio04/ is a RAID1 of two disks accessible via iscsi (in the
following tests, I changed the mount point from /apoio04/ to /iscsi04-
lun0/ but they are exactly the same).
>
> Could you set the IO scheduler to noop
> echo noop > /sys/block/sdX/queue/scheduler and see if that makes a difference.
I checked the definition and I have
[r...@core06 ~]# cat /sys/block/sdh/queue/scheduler
noop anticipatory deadline [cfq]
Now I've changed to
[r...@core06 ~]# cat /sys/block/sdh/queue/scheduler
[noop] anticipatory deadline cfq
and I've run the tests again. This is what I got:
[r...@core06 ~]# dd if=/dev/zero of=/iscsi04-lun0/b1 bs=64k
count=125000
125000+0 records in
125000+0 records out
8192000000 bytes (8.2 GB) copied, 470.332 seconds, 17.4 MB/s
[r...@core06 ~]# dd if=/dev/zero of=/iscsi04-lun0/b2 bs=128k
count=62500
62500+0 records in
62500+0 records out
8192000000 bytes (8.2 GB) copied, 470.973 seconds, 17.4 MB/s
Basically, the performance didn't increase :(
> And then also run
> iscsiadm -m session -P 3
>
[r...@core06 ~]# iscsiadm -m session -P 3
iSCSI Transport Class version 2.0-724
iscsiadm version 2.0-868
Target: iqn.1992-01.com.lsi:1535.600a0b80003ad11c00000000490ade2d
Current Portal: 10.131.2.14:3260,1
Persistent Portal: 10.131.2.14:3260,1
**********
Interface:
**********
Iface Name: default
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:8c56e324f294
Iface IPaddress: 10.131.4.6
Iface HWaddress: default
Iface Netdev: default
SID: 37
iSCSI Connection State: LOGGED IN
iSCSI Session State: Unknown
Internal iscsid Session State: NO CHANGE
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 131072
MaxXmitDataSegmentLength: 65536
FirstBurstLength: 8192
MaxBurstLength: 262144
ImmediateData: Yes
InitialR2T: Yes
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 38 State: running
scsi38 Channel 00 Id 0 Lun: 0
scsi38 Channel 00 Id 0 Lun: 1
scsi38 Channel 00 Id 0 Lun: 2
scsi38 Channel 00 Id 0 Lun: 3
scsi38 Channel 00 Id 0 Lun: 4
scsi38 Channel 00 Id 0 Lun: 5
scsi38 Channel 00 Id 0 Lun: 31
Current Portal: 10.131.2.13:3260,1
Persistent Portal: 10.131.2.13:3260,1
**********
Interface:
**********
Iface Name: default
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:8c56e324f294
Iface IPaddress: 10.131.4.6
Iface HWaddress: default
Iface Netdev: default
SID: 38
iSCSI Connection State: LOGGED IN
iSCSI Session State: Unknown
Internal iscsid Session State: NO CHANGE
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 131072
MaxXmitDataSegmentLength: 65536
FirstBurstLength: 8192
MaxBurstLength: 262144
ImmediateData: Yes
InitialR2T: Yes
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 39 State: running
scsi39 Channel 00 Id 0 Lun: 0
scsi39 Channel 00 Id 0 Lun: 1
scsi39 Channel 00 Id 0 Lun: 2
scsi39 Channel 00 Id 0 Lun: 3
scsi39 Channel 00 Id 0 Lun: 4
scsi39 Channel 00 Id 0 Lun: 5
scsi39 Channel 00 Id 0 Lun: 31
Current Portal: 10.131.2.16:3260,2
Persistent Portal: 10.131.2.16:3260,2
**********
Interface:
**********
Iface Name: default
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:8c56e324f294
Iface IPaddress: 10.131.4.6
Iface HWaddress: default
Iface Netdev: default
SID: 39
iSCSI Connection State: LOGGED IN
iSCSI Session State: Unknown
Internal iscsid Session State: NO CHANGE
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 131072
MaxXmitDataSegmentLength: 65536
FirstBurstLength: 8192
MaxBurstLength: 262144
ImmediateData: Yes
InitialR2T: Yes
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 40 State: running
scsi40 Channel 00 Id 0 Lun: 0
scsi40 Channel 00 Id 0 Lun: 1
scsi40 Channel 00 Id 0 Lun: 2
scsi40 Channel 00 Id 0 Lun: 3
scsi40 Channel 00 Id 0 Lun: 4
scsi40 Channel 00 Id 0 Lun: 5
scsi40 Channel 00 Id 0 Lun: 31
Current Portal: 10.131.2.15:3260,2
Persistent Portal: 10.131.2.15:3260,2
**********
Interface:
**********
Iface Name: default
Iface Transport: tcp
Iface Initiatorname: iqn.1994-05.com.redhat:8c56e324f294
Iface IPaddress: 10.131.4.6
Iface HWaddress: default
Iface Netdev: default
SID: 40
iSCSI Connection State: LOGGED IN
iSCSI Session State: Unknown
Internal iscsid Session State: NO CHANGE
************************
Negotiated iSCSI params:
************************
HeaderDigest: None
DataDigest: None
MaxRecvDataSegmentLength: 131072
MaxXmitDataSegmentLength: 65536
FirstBurstLength: 8192
MaxBurstLength: 262144
ImmediateData: Yes
InitialR2T: Yes
MaxOutstandingR2T: 1
************************
Attached SCSI devices:
************************
Host Number: 41 State: running
scsi41 Channel 00 Id 0 Lun: 0
scsi41 Channel 00 Id 0 Lun: 1
scsi41 Channel 00 Id 0 Lun: 2
scsi41 Channel 00 Id 0 Lun: 3
scsi41 Channel 00 Id 0 Lun: 4
scsi41 Channel 00 Id 0 Lun: 5
scsi41 Channel 00 Id 0 Lun: 31
Cheers and thanks
Goncalo Borges
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"open-iscsi" group.
To post to this group, send email to open-iscsi@googlegroups.com
To unsubscribe from this group, send email to
open-iscsi+unsubscr...@googlegroups.com
For more options, visit this group at http://groups.google.com/group/open-iscsi
-~----------~----~----~----~------~----~------~--~---
