Difference in storage benchmark resuIts: iometer vs. SQLIO

Hey guys,
Just wondering if anyone could explain a difference in benchmark numbers between iometer and SQLIO.
To set this question up: 
I'm trying to get baseline performance for a new SAN installation, and have been testing with SQLIO for a particular workload: Random 8kB to 32kB file access (10:1 read:write) against a fileshare containing millions of these small files. The numbers were
looking pretty good, example: 8k-read-random, 8-threads, 8 outstanding requests, hwbuffer, 120sec resulted in 100k IOPS.
A colleague suggested using iometer to confirm results, but when I configure iometer for same io profile and test params, I get lower figures. So for the example above, I get about 60k IOPS in iometer. 
The physical disk performance counters match up with during SQLIO and iometer tests, so I am confident that the results produced by each are valid. I'm looking at average request size (to confirm size of io request), disk transfers per second, amongst others.
I'm just not sure why there is such a disparity... To be specific, I can see 100k disk requests/sec in perfmon, 100k IOPS in the SQLIO results output, and 100k IOPS in the storage vendor's separate reporting tool. I've double checked configuration parameters
between the two, and played with iometer values (like queue size or worker count) to see if I could coax greater numbers out of it. Haven't been able to yet. 
Who to believe? Is iometer less capable of pushing IO, or is it the more accurate one? Hard to see SQLIO not being "accurate" since Microsoft's teams use it themselves. 
Thanks!

SQLIO initializes files with a NULL byte so if you're testing on a 300GB file, you have a 300GB file with nothing in it. Many storage systems will recognize this and compress/dedupe such patterns, thereby inflating numbers. IoMeter will size a 300GB
file with randomized data (depending on your configuration). This would be a more realistic baseline since most of our data isn't a bunch of null bytes in a repeated pattern.
Intel I/O Meter is also using a limited sized pattern so on a heavy synthetic tests it will also fail :( Looks like new wave in a Windows-running tests is DiskSPD. See:
DiskSPD
http://blogs.technet.com/b/josebda/archive/2014/10/13/diskspd-powershell-and-storage-performance-measuring-iops-throughput-and-latency-for-both-local-disks-and-smb-file-shares.aspx
It DOES generate a fully random I/O patterns on request.
Good luck!
StarWind Virtual SAN clusters Hyper-V without SAS, Fibre Channel, SMB 3.0 or iSCSI, uses Ethernet to mirror internally mounted SATA disks between hosts.

Similar Messages

  • Difference between Storage Grain and Query Grain

    What is the difference between Storage Grain and Query Grain ?
    In the query below:
    Select quarter, YearAgoSales:
    Query grain: quarter
    Time Series grain : year
    what is the Storage Grain ?
    As mentioned in Help Guide, Storage Grain is "grain of the aggregate source".
    Regards,

    storage grain: by its name is the grain of your source.
    query grain: by its name is the grain at which you define your query.
    based on the example you mentioned:
    Though you have a source at day grain, you are querying at quarter level (which corresponds to query grain)....
    mark posts promptly
    -bifacts
    http://www.obinotes.com

  • RE: Difference between Storage location and warehouse

    Hi All,
    What is the difference between storage location and warehouse?

    Hi,
    First of all Storage Lcoation is part of Inventory Management.
    Warehouse is part of Logistics Execution.
    Storage location is part of SAPu2019s enterprise structure that holds the stock quantity
    Option: To maintain a single storage bin for every material in every storage location
    To simplify: To utilize a storage location as the u201Cstorage facilityu201D means that the materialu2019s actual bin location is not important, or that the material is located in a single bin throughout the storage.
    Warehouse is part of SAPu2019s enterprise structure that holds the stock bin location
    To simplify: When a warehouse (Warehouse Management) is utilized as a storage facility, a materialu2019s actual bin location is of great importance
    Advantage: Track a materialu2019s changing bin location
    Warehouse Management has greater applications for use in a storage facility
    Disadvantage: More complexity and usually requires more  data entry
    Hope this helps.

  • Differences in "storage used" between iPad and iTunes

    I have an iPad Mini 2 and there a differences between the stated "storage used" between the iPad and iTunes.
    Looking in the general settings "Storage" it states I have used 113GB and available is 413MB.
    Looking on iTunes, when the iPad is connected, it states I have 67.20GB free.
    Which is correct and what causes the problem?
    How is it fixed if it is because the iPad has a fault?
    Many thanks.

    It is now a couple of weeks and noticed the discrepancy occurring again.  I did not want to go through the above process again because it took about 4 hours to get my iPad up, running again and normal.
    Again, there was a difference in memory by about 20GB.
    This time it tried something different.
    1) Went into General settings on iPad and managed memory.  From here I removed all films and TV episodes.  Now Video memory was zero.
    2) Switched off WiFi.  When I opened the Video app, I noticed a pile of films and TV episodes showing, even though they had the cloud icon.  They could even be watched.  I deleted these films/episodes.
    3) Viewed the iPad memory using iTunes on laptop and compared to iPad general settings usage (video memory negligible).  Both numbers pretty much spot on.
    My musings - I can only assume that the iPad does not properly delete films/episodes that I had previously watched.  It is evidently holding on to the video, even though I had deleted them and they were not showing in general settings.  Though it is a hassle, I at least now how to find where the "lost" memory is and how to reclaim it.

  • Difference in storage types

    What is the difference between the basic 13-inch Air's "128GB PCIe-based flash storage" and the non-retina, basic 13-inch Pro's "500GB 5400-rpm hard drive"? I know that 500 is obviously more than 128 but just in terms of type of storage

    One is a rotating platter Hard Disk Drive with a motor and moving parts. It connects to the computers HDD interface which has a SATA 6Gb/s transfer rate.
    The PCIe SSD is a Solid State Drive with no moving parts. It connects to the computer's internal PCI Express bus that operates at roughly 40 Gb/s or nearly 10 times faster. The PCIe SSD is simply much faster than a HDD or even an SSD that connects to the SATA bus as most do.

  • Difference in storage method for DMS and Services for Object

    Hi-
    Our R/3 version is: 4.7 Enterprise.
    In most (if not all) of the transactions users execute, there is a feature where they can attach a file using "Services for Object" from their PC to the associated record (i.e. material master, purchase orders, service notifications, etc.) 
    What I would like to know is where the document is stored.  From what I found on help.sap.com it says that it is a link from the user's PC.  But I would guess it is storing a copy of the file as a blob on the R/3 server somewhere.  Is this true?  Or is there a risk if the user's harddrive dies, that the file is no longer available for viewing? 
    I am trying to determine the difference between using the Services for Object feature vs. DMS and setting up an object link for the specific object type (i.e. material).
    Thanks!
    -Jenn

    I found the following about Services for Objects: 
    Business Workplace
    The documents that were appended to an object using Create attachment and Create note are stored in the Business Workplace. There, for example, you can make settings for where the documents should be stored (R/3 System or Web Server) and which document classes may be loaded in the SAP System (for example DOC, but not EXE).
    Sending is also carried out internally using the Business Workplace. Messages are created that contain a link to the object as an attachment. By double-clicking on the attachment, the users can call the default method of the object. This is normally the display method.

  • Potential Versioning Differences Between Storage Server and Grid Infrastructure/DB

    Hello.
    While awaiting my MOS CSI access to be approved For Exadata HW issues so I can open an SR, I have a question.  We are about to apply QFSDP for BP 22 on one of our full RACK X3 Exadta servers.  Currently, the Grid Infrastructure (GI)/DB SW is at 11.2.0.3.0 and teh storage SW is at 11.2.3.2.  Our last BP was 19.  BEFORE we apply the BP 22, we want to upgrade the clusterware to 12c - but not the DB (that will come later).  This is a high level question which I have discussed with several Oracle techs, but wanted to see what the experience/opinion is while I await access to my CSI.  Can you have your Grid Infrastructure (GI) running at a higher version than that of your your storage server?  The tech I spoke to said that all GI/DB SW should be at a version that is NO GREATER than that of the storage server - meaning a 12c version of the GI would not be compatible with a lowere version of the storage server.  Thank you in advacne for any guidance.
    Regards,
    Matt

    Hi Matt,
    Seems you want to do a lot in one go here.
    Maybe you should look at Doc ID 888828.1, Doc ID 1537407.1 and Doc ID 1373255.1 for a start.
    For 12c (grid and rdbms) on Exadata it is recommended to upgrade your FW to 12.1.1.1.0 first.
    My advice would be to patch up 11g to BP22 and when done start planning the 12c upgrade (keeping the 11g dbhome).
    Regards,
    Tycho

  • Does anyone know what's the difference of storage loation type & bin?

    Hi Experts
      Now we use WM. Hope to consult if we could assgin one locaiton for two location type ?
    Does that mean, for each location type ,it will has its own bin number and physical place?
    Another thing, we hope when locaiton type A is empty , it could create TO auto and inform user to move mateiral from locaiton type B.  COuld it implement in sap? like some stragety ?
    Thanks
    alice

    - One storage location can have "N" number of storage type.
    - One storage type can have "N" number of storage bins.
    I replied for your second part of question in another thread.
    Regards
    Arif Mansuri

  • Difference between Storage Unit type and storage type

    Hi,
    I am confused with storage unit type and storage type.
    Can anyone help me with real case examples.
    I would like to know about Storage unit types and their uses in WM.

    Hello!
    Storage type is a storage area and Storage Unit Type is strategies are used in the warehouse process for creating transfer orders.
    A storage type is a storage area, warehouse facility, or a warehouse zone that you define in Warehouse Management (WM) for a warehouse number. This is a physical or logical subdivision of a warehouse complex that is characterized by its warehouse technique, the space used, its organizational form, or its function.  A storage type generally contains several storage spaces or slots. These are called storage bins in Warehouse Management (WM).
    See also:
    https://wiki.sdn.sap.com/wiki/display/ERPSCM/WMOrganisationalStructure
    http://help.sap.com/saphelp_470/helpdata/en/c6/f838f94afa11d182b90000e829fbfe/content.htm
    Storage Unit Type is putaway strategy, the system processes different storage unit types (for example, pallets) and allocates them to the appropriate section. Often, one storage bin is divided into several smaller sections. Typically, only the same storage unit types can be placed into a storage bin at one time.
    See also:
    http://wiki.sdn.sap.com/wiki/display/ERPSCM/PutawayandRemovalStrategiesin+WM
    http://help.sap.com/saphelp_470/helpdata/en/c6/f844c44afa11d182b90000e829fbfe/content.htm
    Milca

  • Transferring data from 750GB backup drive to new MacBook Pro with 256 Gb PCI-e flash storage?

    Yesterday my late-2008 aluminium unibody MacBook died - absolutely and definitively.  I've tried SMC reset multiple times to no avail.  However, it served me well for almost six years and it's now time to move on.  I've decided to buy a 13 inch MacBook Pro Retina with 256Gb PCI-e flash storage.  Obviously, it will come with Mavericks installed as the operating system.
    When it died, my MacBook was running OS X 10.8.5, the original hard drive had been replaced with a Western Digital 750GB, 7200 rpm drive of which I believe about 350GB was used. I keep two x 1Tb Lacie Rugged backup drives, each of which has both Time Machine and SuperDuper Bootable Clone backups.
    My questions are these -
    1.     How should I proceed to transfer my data from my external backup drives to my new MacBook Pro Retina, given the difference in storage capacity of my existing backup drives and my new MacBook Pro?
    2.     I have over 32,000 photos in my iPhoto Library which, obviously, consume a big slab of disk space.  I'm not sure how I go about 'quarantining' the iPhoto Library so that it doesn't use all the flash drive storage.
    3.      One of the Lacie Rugged's has a 'triple interface' - i.e. USB 2, Firewire 400 and Firewire 800.  The other has a USB 2 and 2 x Firewire 800 (IIRC).    The MacBook Pro Retina has two USB 3 ports and two Thunderbolt 2 ports. I want to continue to use the Lacies as my backup drives.  Am I better off to use the USB  ports or should I invest in a Thunderbolt to USB cable?  Does it make any real difference in terms of backing up (which, in my case, doesn't have to be all that speedy).
    4.     What else should I be thinking about? I know I'm bound to have overlooked the most obvious problems but can't think what they may be ...
    Cheers
    Tricia

    Patricia Henwood wrote:
    3.      One of the Lacie Rugged's has a 'triple interface' - i.e. USB 2, Firewire 400 and Firewire 800.  The other has a USB 2 and 2 x Firewire 800 (IIRC).    The MacBook Pro Retina has two USB 3 ports and two Thunderbolt 2 ports. I want to continue to use the Lacies as my backup drives.  Am I better off to use the USB  ports or should I invest in a Thunderbolt to USB cable?  Does it make any real difference in terms of backing up (which, in my case, doesn't have to be all that speedy).
    USB3 is backwards compatible with USB2, so you can use the old USB cables.  For faster data transfer rates, Firewire 800 would be available using this adapter:
    http://store.apple.com/us/product/MD464ZM/A/apple-thunderbolt-to-firewire-adapte r
    Firewire 800 is about twice as fast as USB2, theoretically.
    Ciao.

  • Question: Difference in performace between 256gb vs 512gb

    A friend of mine today made funny of me by asking this question:
    Besides the storage capacity difference,
    what are the difference (if there are any), between a MacBook Pro Retina 15" with 256gb vs 512gb.
    Same processor, same ram, same evereything.  Exactly two identical machine, but one with 256gb and the other with 512gb.
    Again, I know the storage difference, but there are any improvement in performace, speed and responsiveness?
    Thank you
    And tomorrow I can give him the answer :-)

    No performance difference, only storage capacity.
    Ciao.

  • Difference in space occupied by NUMBER(38,0) and NUMBER(10,0)

    Hi,
    I will like to know if there is any difference in storage space occupied by NUMBER(38,0) and NUMBER(10,0) if I store whole numbers less than 100,000,000 in it. I remember of having read it that it will occupy same storage space but I will appreciate if someone can explain why is it so.
    Thanks,
    Akshay.

    Please Refer to:
    http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/datatype.htm#i16209

  • Deleted videos but Iphone 5C still saying storage is used by videos

    My daughter has an 8gb iphone 5C running iOS8. Let me preface this by saying, I already know this is NOT a lot of storage space. That is NOT the concern here.
    Moving onward.
    I used the phone to take several videos for a work project and quickly got messages that it was full, so I promptly deleted the videos, but to no avail. Everything that had just gone on the phone is now clear from the phone, but in settings it is still saying that the space used by those videos is full. It is also saying in the "About" section that there are 12 videos on the phone when there are zero. Without fully resetting the phone, how can I get the phone to recognize that all of that content has been deleted so we can once again take a photo??
    Thanks for the help!!

    Hi ..
    Restart the iPhone to see a difference in storage space.
    Press and hold the Sleep/Wake button for a few seconds until the red "slide to power off" slider appears, then swipe the slider to power off.
    Then press and hold the Sleep/Wake button until the Apple logo appears.

  • WM Storage location

    Hi
    What is the difference between storage location in Invt Management and Warehouse Management storage location
    Regards
    Bhushan

    In inventory management, the goods will be stored and managed at the storage location level itself, that is you donot know exactly where the stock lies in the storage location.
    In warehouse management, the storage location can be sub-divided into storage types like open, bulk, rack etc., or else even you can have different storage locations for each storage types. It can be further sub-divided into storage sections (fast moving goods, slow moving goods etc..,) and storage bins (where actually the goods are stored & managed). By doing so you know the exact place where the goods is stored.

  • Resolving differences in IM and WM and HU

    Dear all,
    I would like to identify the inventory differences between the above and resolve these differences.
    Do you have any solutions, ideas or suggestions to make..
    Thanks

    Hi ,
    LI20 IS USED TO CLEAR DIFFERENCES IN WM AND LI21 IS TO CLEAR DIFFERENCES IN IM.
    IN WM YOU POST YOUR DIFFERENCES IN STORAGE TYPE 999 AND IN IM ITS A LOSS OR A GAIN.
    Thanks
    Silas
    Edited by: Silas Ngcobo on Mar 9, 2011 3:03 PM

Maybe you are looking for