SADF usage to get disk space statistics

[slym]

Hello there,

I'm trying to use sysstat to monitor disk space but documentation is not quite clear on how to get statistics.

I enabled the -S XDISK option for SADC collection but I've been unable to display statistics using SADF.

Could someone give some real-world examples of using SADF command-line to display these statistics ?

I tried several syntax but none worked.

Thank you in advance.

[stevekay]

Sure, here's an example.

$ /usr/lib64/sa/sadc -S XALL 1 10 foo.dat
$ sadf -- -F MOUNT foo.dat|head
ans2    1       2023-04-18 09:21:09 UTC /       MBfsfree        12267
ans2    1       2023-04-18 09:21:09 UTC /       MBfsused        1895
ans2    1       2023-04-18 09:21:09 UTC /       %fsused 13.38
ans2    1       2023-04-18 09:21:09 UTC /       %ufsused        13.38
ans2    1       2023-04-18 09:21:09 UTC /       Ifree   7191174
ans2    1       2023-04-18 09:21:09 UTC /       Iused   64890
ans2    1       2023-04-18 09:21:09 UTC /       %Iused  0.89
ans2    1       2023-04-18 09:21:09 UTC /boot   MBfsfree        827
ans2    1       2023-04-18 09:21:09 UTC /boot   MBfsused        187
ans2    1       2023-04-18 09:21:09 UTC /boot   %fsused 18.49
...
$ sadf -j -- -F MOUNT foo.dat|head -20
{"sysstat": {
        "hosts": [
                {
                        "nodename": "ans2",
                        "sysname": "Linux",
                        "release": "5.14.0-70.13.1.el9_0.x86_64",
                        "machine": "x86_64",
                        "number-of-cpus": 1,
                        "file-date": "2023-04-18",
                        "file-utc-time": "09:21:08",
                        "timezone": "GMT",
                        "statistics": [
                                {
                                        "timestamp": {"date": "2023-04-18", "time": "09:21:09", "utc": 1, "interval": 1},
                                        "filesystems": [
                                                {"mountpoint": "/", "MBfsfree": 12267, "MBfsused": 1895, "%fsused": 13.38, "%ufsused": 13.38, "Ifree": 7191174, "Iused": 64890, "%Iused": 0.89},
                                                {"mountpoint": "/boot", "MBfsfree": 827, "MBfsused": 187, "%fsused": 18.49, "%ufsused": 18.49, "Ifree": 523931, "Iused": 357, "%Iused": 0.07}
                                        ]
                                },
                                {
...
$ sar -F MOUNT -f foo.dat
Linux 5.14.0-70.13.1.el9_0.x86_64 (ans2)        18/04/23        _x86_64_        (1 CPU)

10:21:08     MBfsfree  MBfsused   %fsused  %ufsused     Ifree     Iused    %Iused MOUNTPOINT
10:21:09        12267      1895     13.38     13.38   7191174     64890      0.89 /
10:21:09          827       187     18.49     18.49    523931       357      0.07 /boot
10:21:10        12267      1895     13.38     13.38   7191174     64890      0.89 /
10:21:10          827       187     18.49     18.49    523931       357      0.07 /boot
10:21:11        12267      1895     13.38     13.38   7191174     64890      0.89 /
10:21:11          827       187     18.49     18.49    523931       357      0.07 /boot
...
$ sadf -O autoscale,showinfo,showtoc -g -- -A foo.dat > foo.svg
$ python -m http.server 8000

[slym]

Thank you very much. With your answer I've been able to make it work. It was not clear to me that I had to pass SAR options in SADF command-line.

I used this variant :

sadf -- -F MOUNT