IOPS vs Throughput (MBps)?

$\text{IOPS} * \text{TransferSizeInBytes} = \text{BytesPerSec}$ (with the answer typically converted to MegabytesPerSec)

Some ballpark numbers:

Device	Type	IOPS	Interface
7,200 rpm SATA drives	HDD	~75-100 IOPS^[2]	SATA 3 Gb/s
10,000 rpm SATA drives	HDD	~125-150 IOPS^[2]	SATA 3 Gbit/s
10,000 rpm SAS drives	HDD	~140 IOPS ^[2]	SAS
15,000 rpm SAS drives	HDD	~175-210 IOPS ^[2]	SAS

Solid State Devices ranges 60,000 to 400,000 IOPS depending the type of brand/model and connectivity (SATA cable (3g/6g), FC/InfiniBand, or PCIe). Info from - http://en.wikipedia.org/wiki/IOPS

As of Jul 2012, the SSD max throughput is still below 600MBps for SSD and 1GBps using PCIe technology. SATA cable can transfer max 6Gbps (or 768MBps - 6Gbps/6bit). With PCIe, this can double to 16Gbps (or 2048MBps). There is a need to seriously look into the storage design how the disk should be connected (SATA cable or PCIe) for optimum performance. Or else, you would buy an expensive SSD which will be underperformed due to the throughput.

SSD - http://en.wikipedia.org/wiki/Solid-state_drive

SATA cable - http://en.wikipedia.org/wiki/Serial_ATA

Data unit conversion - http://en.wikipedia.org/wiki/Megabytes_per_second#Megabyte_per_second

Comments

VMware VRNI 3.5 NTP is working but not healthy

We have experienced this problem where some of the major services not started. You will not be able to connect to the vRNI via web -> https://<ip_address_of_vrni_platform>>. This probably caused by NTP insync. You need to manually start these services. Login with Consoleuser / and default password if not changed before via venter web console. Run services restart and wait for couple minutes (it took me 5-6 mins). Types of Users User name Password Admin UI admin@local Set this password in the Activate License window during installation. SSH User support ark1nc0113ct0r CLI User consoleuser ark1nc0ns0l3 Note It is recommended that the users change the default passwords immediately after the deployment. Procedure 1 Navigate to https://<vRealize Network Insight Platform IP address> . 2 Log in to the product UI with the corresponding user name and password. ...

Packaging MS Office 2013 Professional Plus with Thinapp 4.7.3

I can't find the link to package MS Office 2013 but only MS Office 2010 as here . I'm packaging MS Office 2013 the same way MS office 2010 did and it works. Some notes to be taken:- Always run the thinapp with local administrator privilege. Make sure you modify the config.xml (located on proplusr.ww folder), save it and run the setup in command prompt, e.g.. setup.exe /config c:\tmp\config.xml I will choose to run thinapp with VMware Fusion/Workstation with SSD and snapshot. This will allow you to easily revert the snapshot anytime you like. Since the whole Office will be packaged, always select option "Run all from my computer" Always remember to run the application a couple times after installation Always remember to activate the license before proceeding with post-scan I've not installed .net framework as suggested by some blog and the Office 2013 is working. I will run the application and testing to see how it goes. So far, I've thinapp MS o...

vSphere Replication - checking the replication status

Enable SSH on ESXi host (you can do this using vCenter) Download putty or any SSH client and log in with root access vim-cmd vmsvc/getallvms ~ # vim-cmd hbrsvc Commands available under hbrsvc/: vmreplica.abort vmreplica.pause vmreplica.create vmreplica.queryReplicationState vmreplica.disable vmreplica.reconfig vmreplica.diskDisable vmreplica.resume vmreplica.diskEnable vmreplica.startOfflineInstance vmreplica.enable vmreplica.stopOfflineInstance vmreplica.getConfig vmreplica.sync vmreplica.getState See more at: http://www.virtuallyghetto.com/2011/07/hbr-host-based-replication-cli-for-srm.html#sthash.mpqbyGmw.dpuf http://www.virtuallyghetto.com/2011/07/hbr-host-based-replication-cli-for-srm.html

JKuan Blog!

Search This Blog