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тАО07-13-2008 10:45 PM
тАО07-13-2008 10:45 PM
Solved! Go to Solution.
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тАО07-14-2008 12:07 AM
тАО07-14-2008 12:07 AM
Re: file system capacity and performance
and load in the files system.
its safe to distribute the load between the file systems.
but its fare to remain the file systems as near as 85%. but this is not for I/O performance. but for safe distance of file system becomes full.
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тАО07-14-2008 12:26 AM
тАО07-14-2008 12:26 AM
Re: file system capacity and performance
How you use the file system will have a lot to do with it.
My /opt file system which contains binaries has operated quite nicely with 2% free. Those files don't change much, and there is not a lot of heavy I/O.
An oracle database on filesystem will have trouble operating in that environment and the database my stop when Oracle tries to cut a new extent and there is not enough space.
I generally get concerned for performance and other reasons at 10% free or less.
But as the saying goes, your mileage may vary.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО07-15-2008 04:43 AM
тАО07-15-2008 04:43 AM
Solutionwith HFS over 90% it has issues finding 8K blocks contiguous.
JFS filesystems can be defragmented so files can be written contiguous therefore less pointers. For example if you have a 100MB file you could access all of the blocks of the file with 4 pointers if there si 32 MB free in allocation units within the file system.
You can use fsadm -e -d to defrag a JFS filesystem which makes files contiguous and minimizes the number of pointers a inode has for a file.
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тАО07-15-2008 09:21 PM
тАО07-15-2008 09:21 PM
Re: file system capacity and performance
Check this doc for file system performance and tuning
http://docs.hp.com/en/5576/JFS_Tuning.pdf
Regards,
Amit