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тАО09-30-2005 12:13 AM
тАО09-30-2005 12:13 AM
What is the differance between Raw Device and File System.
We use HP-UX11i operating system.
Which is the better option from above one.
Regards,
Mehul
Solved! Go to Solution.
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тАО09-30-2005 12:15 AM
тАО09-30-2005 12:15 AM
Re: Row Device vs File System
Pete
Pete
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тАО09-30-2005 12:17 AM
тАО09-30-2005 12:17 AM
Re: Row Device vs File System
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тАО09-30-2005 12:28 AM
тАО09-30-2005 12:28 AM
Re: Row Device vs File System
as other guys said
the difference is overhead
introduced by file system/OS.
On my past experience (with other
Unix platform) Raw Device have
better performance.
regards
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тАО09-30-2005 12:31 AM
тАО09-30-2005 12:31 AM
Re: Row Device vs File System
Lots of people claim raw device gives more performance than file system, but gain differ from application type and transaction load.
see also attachment
Regards
Jean-Luc
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тАО09-30-2005 12:32 AM
тАО09-30-2005 12:32 AM
Re: Row Device vs File System
Of course you've not actually told us what you are going to put in these raw filesystems. The downside of raw is, your only access is via database/application utilities. Filesystems are accesible and can be backed up if the database or application is shut down.
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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тАО09-30-2005 12:41 AM
тАО09-30-2005 12:41 AM
Re: Row Device vs File System
see also this comment form Tom Kyte :
http://asktom.oracle.com/pls/ask/f?p=4950:8:11141198565443368411::NO::F4950_P8_DISPLAYID,F4950_P8_CRITERIA:7931107631402
Regards
Jean-Luc
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тАО09-30-2005 01:00 AM
тАО09-30-2005 01:00 AM
Re: Row Device vs File System
i seriously forget to specify that
obviously it depend from use of db
:-)
regards
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тАО09-30-2005 01:16 AM
тАО09-30-2005 01:16 AM
SolutionSo you have a couple of choices: have your databasae developers write a procedure to shutdown the database and export all the data to a set of extra disks, then backup the exported data files. Or, purchase a commercial backup program that understands and handles raw backup images. Be very careful about a cheap solution. Assuming the decision is based on important production servers, the backup program must be able to recover from tape errors, handle multiple tapes for a single backup, take care of documenting each tape, logs all activities and sends alerts when something goes wrong, etc.
Bill Hassell, sysadmin
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тАО09-30-2005 02:12 AM
тАО09-30-2005 02:12 AM