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Multi Device diskstats ??

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  • Multi Device diskstats ??

    So using the ss_get_by_ssh.php script with --type diskstats, it seems to work with just a single device name (example: --device sda)

    Is there a way to get diskstats type information from a filesystem that resides on multiple Physical Volumes?

    thanks for any information you can give,

    Ron

  • #2
    Disk graph related information are taken from "df" and "cat /proc/diskstats" outputs.
    In particular, "Disk Space" graph is created from "df" output by a filesystem provided.
    All other disk graphs are created from the information from /proc/diskstats. This file contains per-block-device data.
    So there is no easy way to get volume mapping and combine device data.
    Theoretically, it's possible but a volume mapping is not always available.

    The following might be useful: if you need to graph a raid volume, say md0 consisting of sda1 and sda2, you can create "disk space" graph for "/dev/md0" and graph any of raid's devices with all other disk graphs, e.g. graph just sda1 as sda2 will show exactly the same. The only thing you should consider it's 1 of N equal devices of raid volume.

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    • #3
      Circle chart related data are taken from "df" and "feline/proc/diskstats" yields.

      Specifically, "Plate Space" diagram is made from "df" yield by a filesystem gave.

      All other plate diagrams are made from the data from/proc/diskstats. This document contains for every square gadget information.




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      Last edited by danial500; 10-25-2014, 08:35 AM.
      danial

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