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Conference turris::digital_unix

Title:	DIGITAL UNIX(FORMERLY KNOWN AS DEC OSF/1)
Notice:	Welcome to the Digital UNIX Conference
Moderator:	SMURF::DENHAM

Created:	Thu Mar 16 1995
Last Modified:	Fri Jun 06 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	10068
Total number of notes:	35879

9367.0. "Need to limit fileset size" by VAXRIO::MIRIAM (Unix Group - CSC/Brazil) Wed Apr 02 1997 15:00

    
     Hi,
    
      A customer created two file sets in the same advfs domain and wants
    to limit the maximum size of each one.  We tried to set quota to the
    fileset using chfsets but only regular users are limitted. 'root' has
    no limit.  Is there a way of fixing a size limit to the file set?
    
      We are using Digital UNIX v3.2C.
    
      Thanks in advance,
    
           Miriam

T.R	Title	User	Personal Name	Date	Lines
9367.1		DECWET::MARTIN		`Wed Apr 02 1997 19:48`	11
	Hmmm. That's still the case in Steel. Fileset quotas are the only way of setting a size limit to individual filesets, but apparently this "limit" doesn't apply to superusers, who are allowed to do whatever they want to do. Is there some reason why they MUST limit root's abilities? If you (and/or your customer) feel this is a bug, please file a QAR or IPMT, whichever is appropriate. --Ken
9367.2	Fset need to be limited ...	BACHUS::DEVOS	Manu Devos DEC/SI Brussels 856-7539	`Thu Apr 03 1997 10:46`	11
	>> Is there some reason why they MUST limit root's abilities? Yes, a fileset is competing with all the other filesets for the domain's space. So, how can we prevent a filesystems containing log files updated by root to eat the whole domain's space? On a UFS filesystem, root cannot extent the filesystem space beyond the partition limit. We would like to have the same limit for fset. Thanks in advance Manu.
9367.3		LEXSS1::GINGER	Ron Ginger	`Thu Apr 03 1997 15:32`	3
	Make your advfs domain on a partition of a size you like, and only make one fileset in the domain. You will have excatly the same effect as UFS, but stillhave the benefit of advfs.
9367.4		BACHUS::DEVOS	Manu Devos DEC/SI Brussels 856-7539	`Thu Apr 03 1997 16:16`	10
	Except that striping is not possible ... Except that file migration is not possible ... Except that I need this limitation on a fileset which is a member of a DECsafe service with volumes/mirroriing contraints... Anyway, thanks for the suggestion... Manu.
9367.5		DECWET::MARTIN		`Thu Apr 03 1997 18:23`	14
	Currently, your only options are to separate the filesets into different domains, as suggested in .3, or to throttle the log files that are being updated by root, or change the processes that update these log files to be run by a non-root user. Limiting your system to one fileset per domain does NOT limit you to one volume per domain. The only difference between having two filesets on one domain vs. two filesets on two different domains is that the two filesets can't share the same physical disk space. Striping is still possible. File migration is still possible. Without knowing more about your DECsafe service with volumes/mirroriing constraints, I can't tell you if that's still possible or not. If you feel this is insufficient (as apparently you do), you need to file a QAR and/or IPMT case to get anything changed.
9367.6	Yes, I know....	BACHUS::DEVOS	Manu Devos DEC/SI Brussels 856-7539	`Fri Apr 04 1997 10:39`	9
	Thanks to all for your replies, Simply, I discovered in .0 a limitation of the Fileset quota that I didn't know. My reasoning was the following: As root is able to change the fileset quota, then it can also be submitted to the quota limit. Manu.
9367.7	Thank you...	VAXRIO::MIRIAM	Unix Group - CSC/Brazil	`Fri Apr 04 1997 10:44`	7
	Thank you all for the replies. The customer can deal with this root restriction. Best regards, Miriam