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Thread: DSS Server stats (check_sys)

  1. #1

    Default DSS Server stats (check_sys)

    Referring to my previous post regarding server stats (check_sys);
    After hitting "remove" several (5+) times, it works and is also fast.
    I had a high load (for whatever reason as nothing was active on the DSS), but since my RAID-5 is still migrating from 64k to 256k (nearly 48h now, sigh!) there might be some explanations..

    Now regarding check_sys, which I see the first time after the hint from To-M:
    - it seems open to anyone without auth ? No big issue for me but maybe noticable
    - I'm missing some valuable things: IOWait CPU, Block/Disk-IO

    For anybody interested, I'm monitoring most already with MRTG remotely, my config below.
    Some notes on this:
    - Ethernet stats are limited (read: useless) to smthg. above 100MBit/s due to 32bit counter overflow. The DSS doesn't provide ifHCInOctets/ifHCOutOctets (64bit counters) to workaround.. I'm also monitoring the Switch to get the traffic..
    - I haven't worked out the DiskIO-counters yet, which would be very interesting. Somehow I'd need some hints which devices are what as my counters for sdaX don't show the same as block-io (which they should in testbed). Any explanantion appreciated..
    - What is *really* missing from the snmp in DSS is hrStorageTable which could be used to monitor volume-usage (commented out below)
    Just replace SNMPCOMMUNITY and dss-hostname to use.

    (config in next post due to 10k char size limit)

  2. #2

    Default MRTG-config #1

    Code:
    #-#Total[dss-hostname_3]: Totals dss-hostname in Location Interface eth0 / x.y.30.40
    Target[dss-hostname_3]: ifInOctets.3&ifOutOctets.3:SNMPCOMMUNITY@dss-hostname:::::2
    SetEnv[dss-hostname_3]: MRTG_INT_IP="x.y.30.40" MRTG_INT_DESCR="eth0"
    Legend1[dss-hostname_3]: Avg Input Traffic Bytes/sec
    Legend2[dss-hostname_3]: Avg Output Traffic Bytes/sec
    Legend3[dss-hostname_3]: Maximal Input Traffic Bytes/sec
    Legend4[dss-hostname_3]: Maximal Output Traffic Bytes/sec
    MaxBytes[dss-hostname_3]: 125000000
    Directory[dss-hostname_3]: dss-hostname
    Title[dss-hostname_3]: eth0 Traffic -- dss
    PageTop[dss-hostname_3]: <H1>eth0 Traffic -- dss</H1>
      <TABLE>
        <TR><TD>System:</TD>     <TD>dss in Location</TD></TR>
        <TR><TD>Maintainer:</TD> <TD>hostmaster@elabnet.de</TD></TR>
        <TR><TD>Description:</TD><TD>eth0  </TD></TR>
        <TR><TD>ifType:</TD>     <TD>ethernetCsmacd (6)</TD></TR>
        <TR><TD>ifName:</TD>     <TD>eth0</TD></TR>
        <TR><TD>Max Speed:</TD>  <TD>125 MBytes/s / 1000 Mbits/s</TD></TR>
        <TR><TD>Ip:</TD>         <TD>x.y.30.40 ()</TD></TR>
        <TR><TD><b>Traffic totals:</b></TD><TD><a href=/mrtg-rrd/totals/dss-hostname_3.total.2004.html>2004</a>&nbsp;<a href=/mrtg-rrd/totals/dss-hostname_3.total.2005.html>2005</a>&nbsp;<a href=/mrtg-rrd/totals/dss-hostname_3.total.2006.html>2006</a>&nbsp;<a href=/mrtg-rrd/totals/dss-hostname_3.total.2007.html>2007</a></TD></TR>
    
      </TABLE>
    # ---------------------------------------------------------------------
    Target[dss-hostname_3-UCastpkts]: ifInUcastPkts.3&ifOutUcastPkts.3:SNMPCOMMUNITY@dss-hostname:::::2
    Directory[dss-hostname_3-UCastpkts]: dss-hostname/detail
    YLegend[dss-hostname_3-UCastpkts]: Unicast pkts/s
    ShortLegend[dss-hostname_3-UCastpkts]: pkts/s
    Legend1[dss-hostname_3-UCastpkts]: Avg Input Unicast Packets
    Legend2[dss-hostname_3-UCastpkts]: Avg Output Unicast Packets
    Legend3[dss-hostname_3-UCastpkts]: Max Input Unicast Packets
    Legend4[dss-hostname_3-UCastpkts]: Max Output Unicast Packets
    LegendI[dss-hostname_3-UCastpkts]: ifInUcast:
    LegendO[dss-hostname_3-UCastpkts]: IfOutUcast:
    MaxBytes[dss-hostname_3-UCastpkts]: 168918
    Options[dss-hostname_3-UCastpkts]: growright, nopercent
    Title[dss-hostname_3-UCastpkts]: eth0 Unicast Packets -- dss
    PageTop[dss-hostname_3-UCastpkts]: <H1>eth0 Unicast Packets -- dss</H1>
    # ---------------------------------------------------------------------
    Target[dss-hostname_3-errors]: ifInErrors.3&ifOutErrors.3:SNMPCOMMUNITY@dss-hostname:::::2
    Directory[dss-hostname_3-errors]: dss-hostname/detail
    YLegend[dss-hostname_3-errors]: IfErrors 
    ShortLegend[dss-hostname_3-errors]: err/min
    Legend1[dss-hostname_3-errors]: Avg Input Errors
    Legend2[dss-hostname_3-errors]: Avg Output Errors
    Legend3[dss-hostname_3-errors]: Max Input Errors
    Legend4[dss-hostname_3-errors]: Max Output Errors
    LegendI[dss-hostname_3-errors]: In:
    LegendO[dss-hostname_3-errors]: Out:
    WithPeak[dss-hostname_3-errors]: ymw
    MaxBytes[dss-hostname_3-errors]: 168918
    Options[dss-hostname_3-errors]: growright, nopercent, perminute
    Title[dss-hostname_3-errors]: eth0 Errors -- dss
    PageTop[dss-hostname_3-errors]: <H1>eth0 Errors -- dss</H1>
    
    #---------------------------------------------------------------
    # User vs System CPU usage 
    Target[dss-hostname.cpu-usage-raw]: ssCpuRawUser.0&ssCpuRawSystem.0:SNMPCOMMUNITY@dss-hostname:::::2
    Directory[dss-hostname.cpu-usage-raw]: dss-hostname
    Options[dss-hostname.cpu-usage-raw]: nopercent,growright
    WithPeak[dss-hostname.cpu-usage-raw]: ymw
    MaxBytes[dss-hostname.cpu-usage-raw]: 100
    AbsMax[dss-hostname.cpu-usage-raw]: 1000
    Title[dss-hostname.cpu-usage-raw]: dss-hostname CPU usage User/System 
    PageTop[dss-hostname.cpu-usage-raw]: <H1>dss-hostname CPU usage User/System </H1>
    Unscaled[dss-hostname.cpu-usage-raw]: ymwd
    ShortLegend[dss-hostname.cpu-usage-raw]: %
    YLegend[dss-hostname.cpu-usage-raw]: CPU Utilization
    Legend1[dss-hostname.cpu-usage-raw]: User CPU %
    Legend2[dss-hostname.cpu-usage-raw]: System CPU % 
    Legend3[dss-hostname.cpu-usage-raw]: Peak User CPU %
    Legend4[dss-hostname.cpu-usage-raw]: Peak System CPU %
    LegendI[dss-hostname.cpu-usage-raw]: User CPU
    LegendO[dss-hostname.cpu-usage-raw]: System CPU
    #---------------------------------------------------------------
    # Nice vs Idle CPU usage 
    Target[dss-hostname.cpu-nice-idle]: ssCpuRawNice.0&ssCpuRawIdle.0:SNMPCOMMUNITY@dss-hostname:::::2
    Directory[dss-hostname.cpu-nice-idle]: dss-hostname
    Options[dss-hostname.cpu-nice-idle]: nopercent,growright
    WithPeak[dss-hostname.cpu-nice-idle]: ymw
    MaxBytes[dss-hostname.cpu-nice-idle]: 100
    AbsMax[dss-hostname.cpu-nice-idle]: 1000
    Title[dss-hostname.cpu-nice-idle]: dss-hostname CPU usage Nice/Idle
    PageTop[dss-hostname.cpu-nice-idle]: <H1>dss-hostname CPU usage Nice/Idle</H1>
    Unscaled[dss-hostname.cpu-nice-idle]: ymwd
    ShortLegend[dss-hostname.cpu-nice-idle]: %
    YLegend[dss-hostname.cpu-nice-idle]: CPU Utilization
    Legend1[dss-hostname.cpu-nice-idle]: Nice CPU %
    Legend2[dss-hostname.cpu-nice-idle]: Idle CPU % 
    Legend3[dss-hostname.cpu-nice-idle]: Peak Nice CPU %
    Legend4[dss-hostname.cpu-nice-idle]: Peak Idle CPU %
    LegendI[dss-hostname.cpu-nice-idle]: Nice CPU
    LegendO[dss-hostname.cpu-nice-idle]: Idle CPU
    #---------------------------------------------------------------
    # IOWait vs Kernel CPU usage 
    Target[dss-hostname.cpu-wait-kernel]: ssCpuRawWait.0&ssCpuRawKernel.0:SNMPCOMMUNITY@dss-hostname:::::2
    Directory[dss-hostname.cpu-wait-kernel]: dss-hostname
    Options[dss-hostname.cpu-wait-kernel]: nopercent,growright
    WithPeak[dss-hostname.cpu-wait-kernel]: ymw
    MaxBytes[dss-hostname.cpu-wait-kernel]: 100
    AbsMax[dss-hostname.cpu-wait-kernel]: 1000
    Title[dss-hostname.cpu-wait-kernel]: dss-hostname CPU usage IOwait/Kernel
    PageTop[dss-hostname.cpu-wait-kernel]: <H1>dss-hostname CPU usage IOwait/Kernel</H1>
    Unscaled[dss-hostname.cpu-wait-kernel]: ymwd
    ShortLegend[dss-hostname.cpu-wait-kernel]: %
    YLegend[dss-hostname.cpu-wait-kernel]: CPU Utilization
    Legend1[dss-hostname.cpu-wait-kernel]: IOwait CPU %
    Legend2[dss-hostname.cpu-wait-kernel]: Kernel CPU % 
    Legend3[dss-hostname.cpu-wait-kernel]: Peak IOwait CPU %
    Legend4[dss-hostname.cpu-wait-kernel]: Peak Kernel CPU %
    LegendI[dss-hostname.cpu-wait-kernel]: IOwait CPU
    LegendO[dss-hostname.cpu-wait-kernel]: Kernel CPU
    #---------------------------------------------------------------
    # IRQ vs SoftIRQ CPU usage 
    Target[dss-hostname.cpu-irq-sirq]: ssCpuRawInterrupt.0&ssCpuRawSoftIRQ.0:SNMPCOMMUNITY@dss-hostname:::::2
    Directory[dss-hostname.cpu-irq-sirq]: dss-hostname
    Options[dss-hostname.cpu-irq-sirq]: nopercent,growright
    WithPeak[dss-hostname.cpu-irq-sirq]: ymw
    MaxBytes[dss-hostname.cpu-irq-sirq]: 100
    AbsMax[dss-hostname.cpu-irq-sirq]: 1000
    Title[dss-hostname.cpu-irq-sirq]: dss-hostname CPU usage IRQ
    PageTop[dss-hostname.cpu-irq-sirq]: <H1>dss-hostname CPU usage IRQ</H1>
    Unscaled[dss-hostname.cpu-irq-sirq]: ymwd
    ShortLegend[dss-hostname.cpu-irq-sirq]: %
    YLegend[dss-hostname.cpu-irq-sirq]: CPU Utilization
    Legend1[dss-hostname.cpu-irq-sirq]: IRQ CPU %
    Legend2[dss-hostname.cpu-irq-sirq]: SoftIRQ CPU % 
    Legend3[dss-hostname.cpu-irq-sirq]: Peak IRQ CPU %
    Legend4[dss-hostname.cpu-irq-sirq]: Peak SoftIRQ CPU %
    LegendI[dss-hostname.cpu-irq-sirq]: IRQ CPU
    LegendO[dss-hostname.cpu-irq-sirq]: SoftIRQ CPU
    #---------------------------------------------------------------
    # System Load SNMP
    Target[dss-hostname.load]: laLoadInt.1&laLoadInt.2:SNMPCOMMUNITY@dss-hostname:::::2
    Directory[dss-hostname.load]: dss-hostname
    Options[dss-hostname.load]: nopercent,gauge,growright
    WithPeak[dss-hostname.load]: ymw
    Title[dss-hostname.load]: dss-hostname load 
    PageTop[dss-hostname.load]: <h1>dss-hostname load </h1>
    MaxBytes[dss-hostname.load]: 2000
    AbsMax[dss-hostname.load]: 10000
    YLegend[dss-hostname.load]: dss-hostname load * 100
    ShortLegend[dss-hostname.load]: &nbsp;
    Legend1[dss-hostname.load]: Load avg 1min (*100)
    Legend2[dss-hostname.load]: Load avg 5min (*100)
    Legend3[dss-hostname.load]: Peak Load avg 1min (*100)
    Legend4[dss-hostname.load]: Peak Load avg 5min (*100)
    LegendI[dss-hostname.load]: Load avg 1min 
    LegendO[dss-hostname.load]: Load avg 5min 
    #---------------------------------------------------------------------
    Target[dss-hostname.mem-buf-cache]: memBuffer.0&memCached.0:SNMPCOMMUNITY@dss-hostname:::::2 * 1024
    Directory[dss-hostname.mem-buf-cache]: dss-hostname
    Options[dss-hostname.mem-buf-cache]: gauge,growright,nopercent
    WithPeak[dss-hostname.mem-buf-cache]: ymw
    Title[dss-hostname.mem-buf-cache]: Mem Buffer/Cache usage -- dss-hostname
    PageTop[dss-hostname.mem-buf-cache]: <h1>Mem Buffer/Cache usage -- dss-hostname</h1><br>
    MaxBytes[dss-hostname.mem-buf-cache]: 4294967296
    YLegend[dss-hostname.mem-buf-cache]: Mem usage
    ShortLegend[dss-hostname.mem-buf-cache]: Bytes
    Legend1[dss-hostname.mem-buf-cache]: Used Buffer
    Legend2[dss-hostname.mem-buf-cache]: Used Cached
    Legend3[dss-hostname.mem-buf-cache]: Peak Buffer
    Legend4[dss-hostname.mem-buf-cache]: Peak Cached
    LegendI[dss-hostname.mem-buf-cache]: Buffer
    LegendO[dss-hostname.mem-buf-cache]: Cached
    #---------------------------------------------------------------
    # Swapping 
    Target[dss-hostname.swappio]: ssRawSwapIn.0&ssRawSwapOut.0:SNMPCOMMUNITY@dss-hostname:::::2 * 512
    Directory[dss-hostname.swappio]: dss-hostname
    Options[dss-hostname.swappio]: nopercent,growright
    WithPeak[dss-hostname.swappio]: ymw
    MaxBytes[dss-hostname.swappio]: 100000000
    Title[dss-hostname.swappio]: dss-hostname swapping
    PageTop[dss-hostname.swappio]: <H1>dss-hostname swapping</H1>
    ShortLegend[dss-hostname.swappio]: Bytes/s
    YLegend[dss-hostname.swappio]: Swapped Bytes/s
    Legend1[dss-hostname.swappio]: Swap In 
    Legend2[dss-hostname.swappio]: Swap Out
    Legend3[dss-hostname.swappio]: Peak Swap In 
    Legend4[dss-hostname.swappio]: Peak Swap Out
    LegendI[dss-hostname.swappio]: Swap In 
    LegendO[dss-hostname.swappio]: Swap Out

  3. #3

    Post MRTG-config #2

    Code:
    #---------------------------------------------------------------
    # IO-blocks
    Target[dss-hostname.io-blocks]: ssIORawSent.0&ssIORawReceived.0:SNMPCOMMUNITY@dss-hostname:::::2 * 512
    Directory[dss-hostname.io-blocks]: dss-hostname
    Options[dss-hostname.io-blocks]: nopercent,growright
    WithPeak[dss-hostname.io-blocks]: ymw
    MaxBytes[dss-hostname.io-blocks]: 100000000
    Title[dss-hostname.io-blocks]: dss-hostname Block I/O 
    PageTop[dss-hostname.io-blocks]: <H1>dss-hostname Block I/O</H1>
    ShortLegend[dss-hostname.io-blocks]: Bytes/s
    YLegend[dss-hostname.io-blocks]: Block I/O (Bytes/s)
    Legend1[dss-hostname.io-blocks]: Sent (read)
    Legend2[dss-hostname.io-blocks]: Received (write)
    Legend3[dss-hostname.io-blocks]: Peak Sent 
    Legend4[dss-hostname.io-blocks]: Peak Received
    LegendI[dss-hostname.io-blocks]: Sent 
    LegendO[dss-hostname.io-blocks]: Received
    #---------------------------------------------------------------
    # IRQ / Context-switches
    Target[dss-hostname.irq-context]: ssRawInterrupts.0&ssRawContexts.0:SNMPCOMMUNITY@dss-hostname:::::2
    Directory[dss-hostname.irq-context]: dss-hostname
    Options[dss-hostname.irq-context]: nopercent,growright
    WithPeak[dss-hostname.irq-context]: ymw
    MaxBytes[dss-hostname.irq-context]: 10000000
    Title[dss-hostname.irq-context]: dss-hostname Ints/Context-switches
    PageTop[dss-hostname.irq-context]: <H1>dss-hostname Ints/Context-switches</H1>
    ShortLegend[dss-hostname.irq-context]: /s
    YLegend[dss-hostname.irq-context]: Int/Context-switches
    Legend1[dss-hostname.irq-context]: Interrupts 
    Legend2[dss-hostname.irq-context]: Context-switches
    Legend3[dss-hostname.irq-context]: Peak Interrupts
    Legend4[dss-hostname.irq-context]: Peak Context-switches
    LegendI[dss-hostname.irq-context]: Interrupts
    LegendO[dss-hostname.irq-context]: Ctx-switches
    
    
    #---------------------------------------------------------------------
    # HOST-RESOURCES-MIB 
    #Target[dss-hostname.diskuse]: 1.3.6.1.2.1.25.2.3.1.6.4&1.3.6.1.2.1.25.2.3.1.6.9:SNMPCOMMUNITY@dss-hostname / 1.3.6.1.2.1.25.2.3.1.5.4&1.3.6.1.2.1.25.2.3.1.5.9:SNMPCOMMUNITY@dss-hostname *100
    #Directory[dss-hostname.diskuse]: dss-hostname
    #Options[dss-hostname.diskuse]: gauge,growright,nopercent
    #WithPeak[dss-hostname.diskuse]: ymw
    #Title[dss-hostname.diskuse]: Disk usage / -- dss-hostname
    #PageTop[dss-hostname.diskuse]: <h1>Disk usage / -- dss-hostname</h1><br>
    #MaxBytes[dss-hostname.diskuse]: 100
    #YLegend[dss-hostname.diskuse]: Disk usage
    #ShortLegend[dss-hostname.diskuse]:  %
    #Unscaled[dss-hostname.diskuse]: ymwd
    #Legend1[dss-hostname.diskuse]: Used Volume /
    #Legend2[dss-hostname.diskuse]: Used backup-vol
    #Legend3[dss-hostname.diskuse]: Peak used Volume /
    #Legend4[dss-hostname.diskuse]: Peak used backup-vol
    #LegendI[dss-hostname.diskuse]: /
    #LegendO[dss-hostname.diskuse]: backup-vol
    #---------------------------------------------------------------------
    #Target[dss-hostname.diskuse2]: 1.3.6.1.2.1.25.2.3.1.6.7&1.3.6.1.2.1.25.2.3.1.6.9:SNMPCOMMUNITY@dss-hostname / 1.3.6.1.2.1.25.2.3.1.5.7&1.3.6.1.2.1.25.2.3.1.5.9:SNMPCOMMUNITY@dss-hostname *100
    #Directory[dss-hostname.diskuse2]: dss-hostname
    #Options[dss-hostname.diskuse2]: gauge,growright,nopercent
    #WithPeak[dss-hostname.diskuse2]: ymw
    #Title[dss-hostname.diskuse2]: Disk usage volumes2 -- dss-hostname
    #PageTop[dss-hostname.diskuse2]: <h1>Disk usage volumes2 -- dss-hostname</h1><br>
    #MaxBytes[dss-hostname.diskuse2]: 100
    #YLegend[dss-hostname.diskuse2]: Disk usage
    #ShortLegend[dss-hostname.diskuse2]:  %
    #Unscaled[dss-hostname.diskuse2]: ymwd
    #Legend1[dss-hostname.diskuse2]: Used install-vol
    #Legend2[dss-hostname.diskuse2]: Used backup-vol
    #Legend3[dss-hostname.diskuse2]: Peak used install-vol
    #Legend4[dss-hostname.diskuse2]: Peak used backup-vol
    #LegendI[dss-hostname.diskuse2]: install-vol
    #LegendO[dss-hostname.diskuse2]: backup-vol
    #---------------------------------------------------------------------
    #Target[dss-hostname.vmuse]: 1.3.6.1.2.1.25.2.3.1.6.2&1.3.6.1.2.1.25.2.3.1.6.3:SNMPCOMMUNITY@dss-hostname:::::2 * 1024
    #Directory[dss-hostname.vmuse]: dss-hostname
    #Options[dss-hostname.vmuse]: gauge,growright
    #WithPeak[dss-hostname.vmuse]: ymw
    #Title[dss-hostname.vmuse]: VM usage -- dss-hostname
    #PageTop[dss-hostname.vmuse]: <h1>VM usage -- dss-hostname</h1><br>
    #MaxBytes1[dss-hostname.vmuse]: 1057112064
    #MaxBytes2[dss-hostname.vmuse]: 1538117632
    #YLegend[dss-hostname.vmuse]: Mem usage
    #ShortLegend[dss-hostname.vmuse]: Bytes
    #Legend1[dss-hostname.vmuse]: Used RAM
    #Legend2[dss-hostname.vmuse]: Used Swap
    #Legend3[dss-hostname.vmuse]: Peak used RAM
    #Legend4[dss-hostname.vmuse]: Peak used Swap
    #LegendI[dss-hostname.vmuse]: RAM
    #LegendO[dss-hostname.vmuse]: Swap
    
    # DiskIO-MIB
    #---------------------------------------------------------------
    # Bytes IO
    Target[dss-hostname.dskio-1]: 1.3.6.1.4.1.2021.13.15.1.1.3.51&1.3.6.1.4.1.2021.13.15.1.1.4.51:SNMPCOMMUNITY@dss-hostname:::::2 + 1.3.6.1.4.1.2021.13.15.1.1.3.58&1.3.6.1.4.1.2021.13.15.1.1.4.58:SNMPCOMMUNITY@dss-hostname:::::2
    Directory[dss-hostname.dskio-1]: dss-hostname
    Options[dss-hostname.dskio-1]: nopercent,growright
    WithPeak[dss-hostname.dskio-1]: ymw
    MaxBytes[dss-hostname.dskio-1]: 1000000000
    Title[dss-hostname.dskio-1]: dss-hostname Disk1 I/O
    PageTop[dss-hostname.dskio-1]: <H1>dss-hostname Disk1 I/O</H1>
    ShortLegend[dss-hostname.dskio-1]: Bytes/s
    YLegend[dss-hostname.dskio-1]: Disk I/O (Bytes/s)
    Legend1[dss-hostname.dskio-1]: Read
    Legend2[dss-hostname.dskio-1]: Written
    Legend3[dss-hostname.dskio-1]: Peak Read
    Legend4[dss-hostname.dskio-1]: Peak Written
    LegendI[dss-hostname.dskio-1]: Read
    LegendO[dss-hostname.dskio-1]: Written
    #---------------------------------------------------------------
    # IO requ
    Target[dss-hostname.dskioreq-1]: 1.3.6.1.4.1.2021.13.15.1.1.5.51&1.3.6.1.4.1.2021.13.15.1.1.6.51:SNMPCOMMUNITY@dss-hostname:::::2 + 1.3.6.1.4.1.2021.13.15.1.1.5.58&1.3.6.1.4.1.2021.13.15.1.1.6.58:SNMPCOMMUNITY@dss-hostname:::::2
    Directory[dss-hostname.dskioreq-1]: dss-hostname
    Options[dss-hostname.dskioreq-1]: nopercent,growright
    WithPeak[dss-hostname.dskioreq-1]: ymw
    MaxBytes[dss-hostname.dskioreq-1]: 100000
    Title[dss-hostname.dskioreq-1]: dss-hostname Disk1 I/O req
    PageTop[dss-hostname.dskioreq-1]: <H1>dss-hostname Disk1 I/O req</H1>
    ShortLegend[dss-hostname.dskioreq-1]: Req/s
    YLegend[dss-hostname.dskioreq-1]: Disk I/O (Req/s)
    Legend1[dss-hostname.dskioreq-1]: Read
    Legend2[dss-hostname.dskioreq-1]: Write
    Legend3[dss-hostname.dskioreq-1]: Peak Read
    Legend4[dss-hostname.dskioreq-1]: Peak Write
    LegendI[dss-hostname.dskioreq-1]: Read
    LegendO[dss-hostname.dskioreq-1]: Write

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