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Quotas in Light weight Disk Pool Manager (proposal)

Quotas in Light weight Disk Pool Manager (proposal). Jean-Philippe Baud, IT-GD, CERN June 2007. VOMS integration. DNs are mapped to virtual UIDs: the virtual uid is created on the fly the first time the system receives a request for this DN (no pool account)

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Quotas in Light weight Disk Pool Manager (proposal)

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  1. Quotas in Light weight Disk Pool Manager (proposal) Jean-Philippe Baud, IT-GD, CERN June 2007

  2. VOMS integration • DNs are mapped to virtual UIDs: the virtual uid is created on the fly the first time the system receives a request for this DN (no pool account) • VOMS roles are mapped to virtual GIDs • A given user may have one DN and several roles, so a given user may be mapped to one UID and several GIDs • Secondary groups are now supported (1.6.4) • Authorization in name space is done using primary and secondary groups • Disk pool selection is done using primary group GSSD June 2007: DPM quotas

  3. Proposal for DPM quotas • Unix-like quotas • Quotas are defined per disk pool • Usage in a given pool is per DN and per VOMS FQAN • Primary group gets charged for usage • Quotas in a given pool can be defined/enabled per DN and/or per VOMS FQAN • Quotas can be assigned by admin • Default quotas can be assigned by admin and applied to new users/groups contacting the DPM GSSD June 2007: DPM quotas

  4. Proposal for DPM quota interfaces • Unix-like quota interfaces • User interface • dpns-quota gives quota and usage information for a given user/group (restricted to the own user information) • Administrator interface • dpns-quotacheck to compute the current usage on an existing system • dpns-repquota to list the usage and quota information for all users/groups • dpns-setquota to set or change quotas for a given user/group GSSD June 2007: DPM quotas

  5. Proposal for DPM quota implementation • Unix-like quota structures struct dpm_quota { char poolname[16]; char q_type; int q_id; u_signed64 maxbytes; u_signed64 curbytes; u_signed64 rsvdnotused; u_signed64 maxfiles; u_signed64 curfiles; }; GSSD June 2007: DPM quotas

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