[sage-berlin] Frage zu sysstat-Tools

[Karsten Becker]

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Florian Streibelt schrieb:
> aha, meine warnt nicht davor und sagt ganz brav:
> 
>        -b     Report I/O and transfer rate statistics.  The following val-
>               ues are displayed:
> 
>               tps
>                      Total number of transfers per second that were issued
>                      to physical devices.  A transfer is an I/O request to
>                      a  physical  device. Multiple logical requests can be
>                      combined into a single I/O request to the device.   A
>                      transfer is of indeterminate size.
> 
>               rtps
>                      Total  number  of  read requests per second issued to
>                      physical devices.
> 
>               wtps
>                      Total number of write requests per second  issued  to
>                      physical devices.
> 
>               bread/s
>                      Total  amount of data read from the devices in blocks
>                      per second.  Blocks are equivalent  to  sectors  with
>                      2.4  kernels  and  newer and therefore have a size of
>                      512 bytes. With older kernels, a block is of indeter-
>                      minate size.
> 
>               bwrtn/s
>                      Total amount of data written to devices in blocks per
>                      second.
> 

Ja, Manpages lesen kann ich schon, nur ich muss ja irgendwie zunächst
mal einen Vergleichswert haben, also z.B. den max. Wert einer PATA-Platte.

Also sehe ich das richtig, wenn beispielsweise ein 'hdparm -t -T
/dev/sda' das Ergebnis 54.00 MB/sec (buffered disk reads) ergibt, dass
bei Volllast der Platte ein 'sar -b' ungefähr den Wert 54MB / 512byte =
ca. 105.000 anzeigen sollte?

Gruß
Karsten


- --
Heaven is, where the police are British, the chefs Italian, the
mechanics German, the lovers French and it's organized by the Swiss.

Hell is, where the police are German, the chefs British, the mechanics
French, the lovers Swiss and it's all organized by the Italians.
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