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тАО01-06-2011 09:28 AM
тАО01-06-2011 09:28 AM
bdf output doubt
I have a very basic , simple doubt below is the out of bdf for a particular mount point
Filesystem kbytes used avail %used Mounted on
/dev/vg03/lvol20 76800000 7490192 64978175 10% /flasher
when i subtract (76800000-7490192)= 69309808
but available show in bdf output is 64978175
That means (69309808-64978175)= 4331633
That mean approximately difference of 4 GB .
why is it so ? where is the 4GB why is it not shown by bdf. please suggest
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тАО01-06-2011 09:47 AM
тАО01-06-2011 09:47 AM
Re: bdf output doubt
The bdf command does not account for any disk space reserved for swap space . . . . . Non-HFS file systems may have other items not accounted for by this command.
Pete
Pete
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тАО01-06-2011 11:45 AM
тАО01-06-2011 11:45 AM
Re: bdf output doubt
So adding to Pete , the one big question is , do you have filesystem swap enabled on /flasher?? If so, could be one of the reasons for why is it so?
Regards
Ismail Azad
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тАО01-06-2011 11:56 AM
тАО01-06-2011 11:56 AM
Re: bdf output doubt
Pete
Pete
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тАО01-06-2011 12:14 PM
тАО01-06-2011 12:14 PM
Re: bdf output doubt
> Another way to look at it is that 4GB out of 70GB is lost to overhead (LVM structures etc.). That's only about 6%.
And the overhead is also typical for planning of the LV and not sure if it's just documentation or people actually follow the rule of maintaining a 5% filesystem overhead (some people surprised whenever I say that) space reserved while planning the size of the L.V.
Regards
Ismail Azad
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тАО01-06-2011 12:48 PM
тАО01-06-2011 12:48 PM
Re: bdf output doubt
can you post:
fstyp -v /dev/vg03/rlvol20
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тАО01-07-2011 08:57 PM
тАО01-07-2011 08:57 PM
Re: bdf output doubt
#bdf /flasher
Filesystem kbytes used avail %used Mounted on
/dev/vg03/lvol20 76800000 31653139 42325436 43% /flasher
when i subtract (76800000-31653139)=45146861
but available show in bdf output is 42325436
Now difference is (45146861-42325436)=2821425
#fstyp -v /dev/vg03/rlvol20
vxfs
version: 5
f_bsize: 8192
f_frsize: 1024
f_blocks: 76800000
f_bfree: 45155029
f_bavail: 42332840
f_files: 11385812
f_ffree: 11288756
f_favail: 11288756
f_fsid: 1074069505
f_basetype: vxfs
f_namemax: 254
f_magic: a501fcf5
f_featurebits: 0
f_flag: 16
f_fsindex: 10
f_size: 76800000
No filesystem swap has been enabled on /flasher
I am really confused
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тАО01-09-2011 08:47 PM
тАО01-09-2011 08:47 PM
Re: bdf output doubt
can you check if there are some process locking space , fuser -cu /flasher.If this is non production/non-critical can you please umount/mount(fuser -ck /flasher;umount /flasher;mount /flasher) and check the difference.
...just another thought.
Regards,
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тАО01-10-2011 01:52 AM
тАО01-10-2011 01:52 AM
Re: bdf output doubt
processes touching this file system or freezing space.