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01-04-2012 06:24 AM
01-04-2012 06:24 AM
high inode use and low file system use.
hi Guys,
i have a strange situation on my hp server.
I have any file system with oracle archive data, that have a low file system utilization, and a strange inode file system utilization:
kbytes used avail %used iused ifree %iuse Mounted on
11005056 310992 10610648 3% 10420225 334175 97% /dbWMSp/akWMSp01
33085056 190176 32637896 1% 15729152 1027936 94% /dbRAMp/akRAMp01
33085056 577400 32253696 2% 26673664 1015840 96% /dbHCRMp/akHCRMp01
33085056 3322432 29530232 10% 9306114 930078 91% /dbMOGp/akMOGp01
33085056 516984 32313768 2% 48496641 1017727 98% /dbSDMp/akSDMp01
in the file system there are few file .
mmm It can be a bug?
May be a old file removed that can't release the inode?
thanks at all
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01-04-2012 07:02 AM
01-04-2012 07:02 AM
Re: high inode use and low file system use.
>that have a low file system utilization, and a strange inode file system utilization:
Are these HFS or VXFS? The inode count usually doesn't matter with the latter, it will make more.
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01-04-2012 07:25 AM
01-04-2012 07:25 AM
Re: high inode use and low file system use.
A file system type is VXFS ...
Yes i know that a vxfs are dinamic management of inode ...
but i think that this high inode use are a bad symptom or a bug or a bad practice of deleting archive file.
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01-04-2012 07:36 AM
01-04-2012 07:36 AM
Re: high inode use and low file system use.
>but I think that this high inode use are a bad symptom or a bug or a bad practice of deleting archive file.
No as I said, inode percentages are not useful for VXFS when it can make more dynamically.
So don't use "bdf -i" or ignore it.
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01-04-2012 07:46 AM
01-04-2012 07:46 AM
Re: high inode use and low file system use.
yes i agree with you but because there are high inode use ?
My customer want a response ... about it
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01-04-2012 08:18 AM
01-04-2012 08:18 AM
Re: high inode use and low file system use.
>11005056 310992 10610648 3% 10420225 334175 97% /dbWMSp/akWMSp01
>but because there are high inode use?
The only useful info is that the inode use is 10420225, not 97%. Also, how does this compare to other filesystems?
>My customer want a response ... about it
Just mention that for VXFS, inodes are created dynamically and therefore the percentage isn't really helpful to monitor.
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01-04-2012 08:58 AM
01-04-2012 08:58 AM
Re: high inode use and low file system use.
Dennis,
i'm sure that isn't normal.
in one of this file system i have 5 file and thousand of inode.
for me is a bug of vxfs or vxvm ( volume manager).
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01-04-2012 09:23 AM
01-04-2012 09:23 AM
Re: high inode use and low file system use.
i think "old think" is being used to try to interpret this. yes, vxfs has inodes but they're not used in an hfs manner.
this link might be useful towards explain things:
http://book.soundonair.ru/hall2/ch08lev1sec5.html
if this still isn't satisfactory, i suggest you look at applying any outstanding vxfs updates/patches. however, I don't think you'll see any change in what's being reported.
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01-04-2012 12:07 PM
01-04-2012 12:07 PM
Re: high inode use and low file system use.
>in one of this file system I have 5 files and thousands of inodes.
How many extents in each file? What does ll(1) show for each?
Did you ever have lots of files that have since been deleted?
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01-06-2012 06:16 PM
01-06-2012 06:16 PM
Re: high inode use and low file system use.
It is perfectly normal for a large filesystem with one file to have thousands of inodes. inodes point to blocks of data. For small files, one inode points to the entire file. But as a file grows and needs additional blocks, additional inodes are allocated. So five files can certainly have thousands of inodes. VxFS handles inodes without any maintenance at all. bdf -i was designed for the archaic HFS filesystems but today, HFS is only required on PARISC systems (/stand). Otherwise, new systems are all VxFS and require no inode maintenance at all, whether the filesystem is 100 MB, 100 GB or 100 TB.
Bill Hassell, sysadmin