Greyhole --stats

[benolding]

Am I really this bad at math?

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[root@localhost ~]# greyhole --stats Greyhole Statistics =================== Storage Pool Total - Used = Free + Attic = Possible /var/hda/files/drives/drive1/gh: 229G - 18G = 200G + 0G = 200G /var/hda/files/drives/drive2/gh: 917G - 10G = 860G + 0G = 860G

I feel so sure 917 minus 10 is 907...

[radioz]

Its the new math!

Hey it's just a few GB.

[gboudreau]

benolding: If you try the same command now, does it work?
If not, the output of "df -k" would help.

Those numbers are taken from "df" commands.

Total and Used are from this command:

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df -k /var/hda/files/drives/drive2/gh | awk '{print $(NF-4),$(NF-3)}' | tail -1

which should show the 5th and 4th from last columns, which should be the total and used columns.

And the free is from this command, the result of which is cached and reused for 15 seconds before it's refreshed:

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df -k /var/hda/files/drives/drive2/gh 2>&1 | grep '%' | grep -v "^df: .*: No such file or directory$" | awk '{print $(NF),$(NF-2)}'

which should show the mount point, and the 3rd from last column (available).

[benolding]

Still doesn't work:

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[root@localhost ~]# greyhole --stats Greyhole Statistics =================== Storage Pool Total - Used = Free + Attic = Possible /var/hda/files/drives/drive1/gh: 229G - 18G = 200G + 0G = 200G /var/hda/files/drives/drive2/gh: 917G - 32G = 838G + 0G = 838G [root@localhost ~]# df -k Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda1 117137748 57119240 54068252 52% / tmpfs 254832 0 254832 0% /dev/shm /dev/sdb1 240364732 18627860 209526972 9% /var/hda/files/drives/drive1 /dev/sdc1 961432072 33409124 879184948 4% /var/hda/files/drives/drive2

Don't think it's a caching problem; nothing's going on on the system.

[gboudreau]

Greyhole reports the correct values (the same as df).
Your problem is what df shows.

Maybe that partition has 5% reserved (for root) on it?

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tune2fs -l /dev/sdc1

Look for "Reserved block count".
5% would be expected for a partition that was formatted by a Linux installer when creating a partition to be used as the root of the OS (/). Maybe that drive was formatted that way, and you didn't touch it since, so it kept using 5%.

The -m parameter of tune2fs allows you to change that value to something smaller if you'd like. See "man tune2fs".
A typical value for data drive would be 1%.

[benolding]

Wow - thanks! Didn't realize the reserved portion was in that little math equation, and you're right! I had the reserved set way too high.

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[root@localhost ~]# greyhole --stats Greyhole Statistics =================== Storage Pool Total - Used = Free + Attic = Possible /var/hda/files/drives/drive1/gh: 229G - 18G = 209G + 0G = 209G /var/hda/files/drives/drive2/gh: 917G - 32G = 876G + 0G = 876G