UCSD Hadoop User and Account Mappings

This twiki is for decribing the UCSD CMS T2 Hadoop and GUMS account mappings to support the CMS experiments storage account requirements.

Table of Contents

CMS Account Mappings per GUMS Server

CMS User account Mapping Example. There are two GUMS servers, gums-2.t2.ucsd.edu for CE and gums-3.t2.ucsd.edu for SE.

Example Mappings for higher level roles and users with optional high priority role.

gums-2.t2.ucsd.edu(CE) gums-3.t2.ucsd.edu (SE)
cmsphedex cmswriter
cmsprod cmswriter
bmangano_pa bmangano
bmangano bmangano

Note: _pa = high priority

CMS Directories and Permission examples

Directory Ownership Permissions Notes
/hadoop/cms/store/user/bmangano bmangano:cmsuser rwxr-x--- rwxr-xr-x to start
/hadoop/cms/store/user/bmangano_pa bmangano:cmsuser rwxr-x--- rwxr-xr-x to start
/hadoop/cms/phedex/store/ cmswriter:cmsuser rwxr-x--- rwxr-xr-x to start

Notes

  • All users are placed in the cmsuser group
  • Hadoop honors a hidden sticky bit on directories

Authors

-- TerrenceMartin - 2009/08/28

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Topic revision: r2 - 2009/09/18 - 17:31:33 - TerrenceMartin
 
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