[HPADM] EMC Disk Performance Test

From: Stuart Abramson (stuarta46_at_yahoo.com)
Date: 05/28/05

  • Next message: dv0r4k: "[HPADM] SUMMARIZE: telnet problem" 
    Date: Sat, 28 May 2005 14:05:21 -0700 (PDT)
To: hpux-admin <hpux-admin@DutchWorks.nl>

    All:
     
    Thanks to:
     
       Leon Kazakin
       Jee
       Bill Hassell
       James Perry
       Todd Willeat
       Vince Taylor
     
    Several people told me that my blocksize for my reads was to small and that fixed me up.
     
    I tried various blocksizes from 512 to 32768 and I/O rate increases from 2 MB/s to 45 MB/s (depending on server, disk, etc.). Block Size of 8192 gives me about 20-30 MB/s on hpux L3000s connected to EMC Symmetrix DMX 2000 with 2 Gb/s FAs:
     
     ((BS=8192))
     ((Count=5120000/BS))
     TIME=$(timex dd if=$Disk of=/dev/null count=$Count bs=$BS 2>&1 \
                    | grep real | awk '{print $2}' )
            MBpS=$( FDIV 5.12 $TIME )
            printf "%5s %6s %8s %6s %6s %6s %6s \n" \
                    $LUN $ARRAY $DISK $SP $BS $TIME $MBpS

     
    Thanks.

                    
    ---------------------------------
    Do You Yahoo!?
     Yahoo! Small Business - Try our new Resources site! 

    --
             ---> Please post QUESTIONS and SUMMARIES only!! <---
        To subscribe/unsubscribe to this list, contact majordomo@dutchworks.nl
       Name: hpux-admin@dutchworks.nl     Owner: owner-hpux-admin@dutchworks.nl
 
 Archives:  ftp.dutchworks.nl:/pub/digests/hpux-admin       (FTP, browse only)
            http://www.dutchworks.nl/htbin/hpsysadmin   (Web, browse & search)
  • Next message: dv0r4k: "[HPADM] SUMMARIZE: telnet problem"