The Storage Blog: January 2019

Tuesday, January 29, 2019

Some KVM Commands

virt-manager

virsh list —all

qemu-img create -f qcow2 -b vm6.qcow2 25G

Tuesday, January 22, 2019

DNS in PowerShell

Get-DnsClient

Set-DnsClientServerAddress -InterfaceIndex -ServerAddresses (“212.38.1.100”)

Add-Computer -DomainName “acme.com” -Credential (get-credential)

SuSE Updates

SuSEConnect -p sle-sdk/12/x86_64

zypper in -t srcpackage 'systemd'

zypper in -t pattern Basis-Devel

zypper in build

Update SuperMicro BIOS

Update bios:

sudo ./AlUpdate -f REDFISH_X10_377.bin -i lan -h 10.0.2.82 623 -u ADMIN -p ADMIN -r y

Monday, January 21, 2019

Jira and eazyBI Integration

Review the demo account:

https://eazybi.com/accounts/1000/cubes
https://eazybi.com/accounts/1000/cubes/Issues/

Using eazyBI with Jira

Create a moving time range

Drag the Time measure to the Rows area.
Create a calculated time range:

Click Time.
Click Calculated members.
Click Define new.
Enter Last 60 days.
Enter:

Aggregate(Filter(
[Time].[Day].Members,
DateBetween([Time].CurrentMember.StartDate,'60 days ago','today')
))

Enable core files in SuSE

https://www.suse.com/support/kb/doc/?id=3054866

Sunday, January 13, 2019

How to make sound work again in a MacOS without a reboot

Sometimes, sound output in a MacBook laptop is gone. To restart the sound driver, kill the coreaudiod service - it will restart automatically and sound output will be restored:

John-MacBook-Pro:~ eyal$ ps -ax|grep corea

81524 ?? 0:00.08 /System/Library/Frameworks/LocalAuthentication.framework/Support/coreauthd

82158 ?? 0:00.35 /usr/sbin/coreaudiod

82163 ttys001 0:00.00 grep corea

John-MacBook-Pro:~ eyal$ sudo pkill coreaudiod

John-MacBook-Pro:~ eyal$ ps -ax|grep corea

81524 ?? 0:00.08 /System/Library/Frameworks/LocalAuthentication.framework/Support/coreauthd

82167 ?? 0:00.30 /usr/sbin/coreaudiod

82172 ttys001 0:00.00 grep corea

Saturday, January 12, 2019

How to add comments in apidoc apiSuccessExample

There seems to be no built-in support for comments, however, '//' seems to work. For example:

* @apiSuccessExample Example data on success - Create volume

* [{

* "_id": "V1", // This is a comment

How to ignore LUN numbers in VMware

ESXi setting:

Scsi.CompareLUNNumber = 0 (default 1)

If set to 0, LUN numbers will NOT be considered to identify LUNs.

Multisession iSCSI

root@mktgmysql3:~# iscsiadm --mode session

tcp: [1] 172.91.40.35:3260,1 iqn.2018-12.com.vendor:server2

root@mktgmysql3:~# iscsiadm --mode session -r 1 --op new

Logging in to [iface: default, target: iqn.2018-12.com.vendor:server2, portal: 172.91.40.35,3260] (multiple)

Login to [iface: default, target: iqn.2018-12.com.vendor:server2, portal: 172.91.40.35,3260] successful.

root@mktgmysql3:~# iscsiadm --mode session

tcp: [1] 172.91.40.35:3260,1 iqn.2018-12.com.vendor:server2

tcp: [2] 172.91.40.35:3260,1 iqn.2018-12.com.vendor:server2

root@mktgmysql3:~# iscsiadm --mode session -r 1 --op new

Logging in to [iface: default, target: iqn.2018-12.com.vendor:server2, portal: 172.91.40.35,3260] (multiple)

Login to [iface: default, target: iqn.2018-12.com.vendor:server2, portal: 172.91.40.35,3260] successful.

root@mktgmysql3:~# iscsiadm --mode session -r 1 --op new

Logging in to [iface: default, target: iqn.2018-12.com.vendor:server2, portal: 172.91.40.35,3260] (multiple)

Login to [iface: default, target: iqn.2018-12.com.vendor:server2, portal: 172.91.40.35,3260] successful.

root@mktgmysql3:~# iscsiadm --mode session -r 1 --op new

Logging in to [iface: default, target: iqn.2018-12.com.vendor:server2, portal: 172.91.40.35,3260] (multiple)

Login to [iface: default, target: iqn.2018-12.com.vendor:server2, portal: 172.91.40.35,3260] successful.

root@mktgmysql3:~# iscsiadm --mode session -r 1 --op new

Logging in to [iface: default, target: iqn.2018-12.com.vendor:server2, portal: 172.91.40.35,3260] (multiple)

Login to [iface: default, target: iqn.2018-12.com.vendor:server2, portal: 172.91.40.35,3260] successful.

root@mktgmysql3:~# iscsiadm --mode session -r 1 --op new

Logging in to [iface: default, target: iqn.2018-12.com.vendor:server2, portal: 172.91.40.35,3260] (multiple)

Login to [iface: default, target: iqn.2018-12.com.vendor:server2, portal: 172.91.40.35,3260] successful.

root@mktgmysql3:~# iscsiadm --mode session -r 1 --op new

Logging in to [iface: default, target: iqn.2018-12.com.vendor:server2, portal: 172.91.40.35,3260] (multiple)

Login to [iface: default, target: iqn.2018-12.com.vendor:server2, portal: 172.91.40.35,3260] successful.

root@mktgmysql3:~# iscsiadm --mode session

tcp: [1] 172.91.40.35:3260,1 iqn.2018-12.com.vendor:server2

tcp: [2] 172.91.40.35:3260,1 iqn.2018-12.com.vendor:server2

tcp: [3] 172.91.40.35:3260,1 iqn.2018-12.com.vendor:server2

tcp: [4] 172.91.40.35:3260,1 iqn.2018-12.com.vendor:server2

tcp: [5] 172.91.40.35:3260,1 iqn.2018-12.com.vendor:server2

tcp: [6] 172.91.40.35:3260,1 iqn.2018-12.com.vendor:server2

tcp: [7] 172.91.40.35:3260,1 iqn.2018-12.com.vendor:server2

tcp: [8] 172.91.40.35:3260,1 iqn.2018-12.com.vendor:server2

root@mktgmysql3:~#

Speed up LUN discovery in VMware ESXi

VMware ESXi scans all luns from 0 to 255. However, it is possible to limit the scan to a lower number by modifying the Disk.MaxLUN parameter to improve LUN discovery speed.

How to convert a standard LUN to RDM

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=3443266

Clean up stale iSCSI devices

esxcli storage core claiming unclaim -t device -d t10.IET_____000100170000000000000000000000000000000000000000esxcli storage core claiming unclaim -t vendor -v

For more information:

http://pubs.vmware.com/vsphere-51/index.jsp?topic=%2Fcom.vmware.vcli.examples.doc%2Fcli_advanced_storage.8.3.html

Wednesday, January 09, 2019

VDBench 4 Corner Performance Tests Configuration

* Four corners testing

messagescan=no

ios_per_jvm=300000

hd=default,vdbench=/home/john/vdb,user=root,shell=ssh,jvms=32

hd=localhost,system=srv31.acme.com

hd=storage1.acme.com,system=srv21.acme.com

hd=storage2.acme.com,system=srv22.acme.com

hd=storage3.acme.com,system=srv23.acme.com

hd=storage4.acme.com,system=srv24.acme.com

hd=storage5.acme.com,system=srv25.acme.com

sd=r100,lun=/dev/sdc,size=10g,openflags=o_direct,threads=128

* Workload Definitions

wd=r10_seqwrite32k,host=(localhost),sd=r10,xfersize=32768,rdpct=0,seekpct=sequential

wd=r10_seqread32k,host=(localhost),sd=r10,xfersize=32768,rdpct=100,seekpct=sequential

wd=r10_randwrite4k,host=(localhost),sd=r10,xfersize=4096,rdpct=0,seekpct=random

wd=r10_randread4k,host=(localhost),sd=r10,xfersize=4096,rdpct=100,seekpct=random

* Runs

*rd=r10_seqread32k,wd=r10_seqread32k,iorate=curve,curve=(95,100),elapsed=10,interval=5

*rd=r10_seqwrite32k,wd=r10_seqwrite32k,iorate=curve,curve=(95,100),elapsed=10,interval=5

*rd=r10_randread4k,wd=r10_randread4k,iorate=curve,curve=(95,100),elapsed=10,interval=5

*rd=r10_randwrite4k,wd=r10_randwrite4k,iorate=curve,curve=(95,100),elapsed=10,interval=5

Sunday, January 06, 2019

LUN Statistics in ONTAP Classic

toaster> lun stats -z

toaster> sysstat -s -i 1

CPU NFS CIFS iSCSI Net kB/s Disk kB/s iSCSI kB/s Cache

in out read write in out age

2% 0 0 0 0 0 0 0 0 0 >60

2% 0 0 0 0 0 0 0 0 0 >60

2% 0 0 4 17 1 0 0 16 0 >60

2% 0 0 0 1 0 0 0 0 0 >60

2% 0 0 0 0 0 0 0 0 0 >60

2% 0 0 0 0 0 0 0 0 0 >60

4% 0 0 1 4 0 0 818 4 0 >60

4% 0 0 0 0 0 12 32 0 0 >60

2% 0 0 0 0 0 0 0 0 0 >60

5% 0 0 7 6 1856 1747 0 0 1788 >60

3% 0 0 14 1901 38 0 0 1826 0 9

2% 0 0 2 9 1 0 0 8 0 9

2% 0 0 0 1 0 0 0 0 0 9

2% 0 0 0 0 0 0 0 0 0 9

2% 0 0 0 0 0 0 0 0 0 9

2% 0 0 0 1 0 0 0 0 0 9

2% 0 0 1 5 0 0 0 4 0 9

5% 0 0 0 0 0 0 1859 0 0 9

4% 0 0 0 0 0 0 2290 0 0 9

--

Summary Statistics ( 19 samples 1 secs/sample)

CPU NFS CIFS iSCSI Net kB/s Disk kB/s iSCSI kB/s Cache

in out read write in out age

Min

2% 0 0 0 0 0 0 0 0 0 9

Avg

2% 0 0 1 102 99 92 263 97 94 >60

Max

5% 0 0 14 1901 1856 1747 2290 1826 1788 >60

toaster> lun stats

/vol/vol0/lun1 (0 hours, 0 minutes, 30 seconds)

Read (kbytes) Write (kbytes) Read Ops Write Ops

1754 1834 7 26

toaster>

Useful esxcli VAAI commands

~ # esxcli storage core device vaai status get

t10.IET_____000100010000000000000000000000000000000000000000

VAAI Plugin Name:

ATS Status: supported

Clone Status: unsupported

Zero Status: supported

Delete Status: unsupported

~ #

~ # esxcli system settings advanced list -o /DataMover/HardwareAcceleratedMove

Path: /DataMover/HardwareAcceleratedMove

Type: integer

Int Value: 1

Default Int Value: 1

Min Value: 0

Max Value: 1

String Value:

Default String Value:

Valid Characters:

Description: Enable hardware accelerated VMFS data movement (requires compliant hardware)

~ #

~ # esxcli system settings advanced list -o /DataMover/HardwareAcceleratedInit

Path: /DataMover/HardwareAcceleratedInit

Type: integer

Int Value: 1

Default Int Value: 1

Min Value: 0

Max Value: 1

String Value:

Default String Value:

Valid Characters:

Description: Enable hardware accelerated VMFS data initialization (requires compliant hardware)

~ #

~ # esxcli system settings advanced list -o /VMFS3/HardwareAcceleratedLocking

Path: /VMFS3/HardwareAcceleratedLocking

Type: integer

Int Value: 1

Default Int Value: 1

Min Value: 0

Max Value: 1

String Value:

Default String Value:

Valid Characters:

Description: Enable hardware accelerated VMFS locking (requires compliant hardware)

~ #

Interesting Articles on Windows Server Cluster Shared Volumes

http://blogs.technet.com/b/scvmm/archive/2013/09/10/working-through-an-unsupported-cluster-configuration-scenario-in-virtual-machine-manager.aspx

Cluster Shared Vols:

http://blogs.msdn.com/b/clustering/archive/2013/12/02/10473247.aspx

http://blogs.msdn.com/b/clustering/archive/2009/03/02/9453288.aspx

Check an update of an RPM without actually updating it

yum check-update

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