Introduction to iRODS Jean-Yves Nief.

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Presentation transcript:

Introduction to iRODS Jean-Yves Nief

Storage virtualization Scientific collaborations spread world-wide: Data can also be spread among different sites. Using heterogeneous: storage technologies (disk/tape, file systems/hierarchical storage system/databases/(home grown) information systems/…). operating systems (Linux: Red Hat/Ubuntu/CentOS/Suse…, Unix: BSD/Solaris 10/AIX/Mac OSX, Windows). Virtual organization needed: Authentication and access rights to the data. Storage virtualization: To be independent from technology and hardware evolution. To be independent of local organisation of the files (servers, mount point etc…).  Logical view of the data independent of the physical location. iRODS - France Grille 31/01/12

Requirements/features (I) Logical organization of the data decoupled from the physical organization: Various client tools: GUI, Web, APIs (PHP, C, Java etc…), shell commands (icd, imkdir, iput, iget….). Authentication: password, certificate X509. Organization of the users’ space by: Type (sysadmin, domainadmin, simple user…). Zones, domains, groups. ACL on the objects and directories. Tickets: temporary rights on a file. iRODS - France Grille 31/01/12

Requirements/features (II) Replica and versions handling. Access to the data from their attributes instead of their name and physical location. File search by metadata associated to them. Files annotations. Auditing: record of all the actions on the system. Storage resources hierarchy: Logical resources: set of physical resources. Compound resources: cache resource (temporary eg: disks) + 1 archival resource (ex: tapes). Ability to interface the system with any kind of information systems, storage system (like HPSS). iRODS - France Grille 31/01/12

SRB (iRODS predecessor) used in HEP, astroparticles, biology, biomedical projects since 2003. 3.7 PBs of data referenced and handled by SRB in 2012. will be phased out in 2013. …. iRODS - France Grille 31/01/12

Beyond storage virtualization Storage virtualization not enough. For client applications relying on these middlewares: No safeguard. No guarantee of a strict application of the data preservation policy. Real need for a data distribution project to define a coherent and homogeneous policy for: data management. storage resource management. Crucial for massive archival projects (digital libraries …). No grid tool had these features until 2006. European Workshop on HPSS 27/01/10

Virtualization of the data management policy Typical pitfalls: No respect of given pre-established rules. Several data management applications may exist at the same moment. Several versions of the same application can be used within a project at the same.  potential inconsistency. Remove various constraints for various sites from the client applications. Solution: Data management policy virtualization. Policy expressed in terms of rules. Storage virtualization @ CC-IN2P3 - CNES 02/06/09 06/06/2018

A few examples of rules Customized access rights to the system: Disallow file removal from a particular directory even by the owner. Security and integrity check of the data: Automatic checksum launched in the background. On the fly anonymization of the files even if it has not been made by the client. Metadata registration: Automated metadata registration associated to objects (inside or outside the iRODS database). Small files aggregation before migration to MSS. Customized transfer parameters: Number of streams, stream size, TCP window as a function of the client or server IP. … up to your needs … Storage virtualization @ CC-IN2P3 - CNES 02/06/09 06/06/2018

iRule Oriented Data Systems. iRODS iRule Oriented Data Systems. Project begun in January 2006, led by DICE team (USA). First version official in December 2006 (v 0.5). Open source. Financed by: NSF, NARA (National Archives and Records Administration). CC-IN2P3 (France), e-science (UK), ARCS (Australia): collaborators. Storage virtualization @ CC-IN2P3 - CNES 02/06/09 06/06/2018

iRODS Based on the same ideas used in SRB. iCAT for iRODS  MCAT for SRB. But goes much further: Data management based on rules build on the server side. System can be fully customized without modifying any single line of the iRODS code. Write your own services by adding your own modules. Virtualization of the data management policy. Logical name space for the rules: Clustering in sets of rules. Chaining the rules in a complex workflow (with a C like language). Versioning handling. Storage virtualization @ CC-IN2P3 - CNES 02/06/09 06/06/2018

Clients and APIs APIs and some of the clients: C library calls …………………… Application level .NET …………………………….. Windows client API Unix / Windows commands …. Scripting languages Java I/O class library (JARGON) Web services, sites Php, python …………………….. Web sites SAGA …………………………… Grid API Web browser (Java-python) ….. Web interface Windows browser ……………… Windows interface WebDAV ………………………... iPhone interface Fedora digital library middleware Digital library middleware Dspace digital library ………….. Digital library services Kepler workflow ………………… Grid workflow Fuse user-level file system ……. Unix file system iDROP …………………………… Drag and drop GUI iRODS - France Grille 31/01/12

iRODS: the rules (I) A rule (prefix ac) contains: Name. Condition. Function(s) call: other rule(s) or micro-services. Recovery in case of error. A micro-service (prefixe msi): Does a given task, can rely on internal functionnalities of iRODS. Standard interface provided for the standard fournie micro-services. 256 micro-services available (extensible at will). Rule example (called when a file is removed): Storage virtualization @ CC-IN2P3 - CNES 02/06/09 06/06/2018

iRODS: the rules (II) this rule will be executed automatically after a new file has been put into iRODS. It replicates the newly created file on two other resources and add a comment metadata on the first replica. acPostProcForPut { on ($objPath like "/tempZone/home/cines-test/archivage/*.tar") { acAdonis1($objPath,"test"); # } msiSysReplDataObj("demoResc4","null"); # replication on an other disk space called “demoResc4” msiSysReplDataObj("diskcache“,"null"); # replication on an other disk space called “diskcache” msiSysMetaModify("comment++++numRepl=0",“salut"); # modify the file metadata called comment for replica number 0 iRODS - France Grille 31/01/12

Example of iRODS users Irods @ USA/Canada Irods @ France Canadian Virtual Observatory NASA iPLANT NARA (US national archives) Private companies (DataDirect Network ….) Irods @ France BNF (national archives) Cines Ciment Observatoire de Strasbourg (in production for the International VO services) Australia, Japan… iRODS - France Grille 31/01/12

iRODS @ CC-IN2P3 iRODS: 1.5 PB with a growth of 5 TBs/day http://cctools.in2p3.fr/mrtguser/compta_irods.php Arts and Humanities (Adonis): 40 TB interfaced with Fedora Commons. HEP (BaBar): SLAC/LYON 3TB/day. Astroparticle (AMS, Double chooz): 2 TB/day. Biology / biomedical apps (Phylogenetics, embryogenesis, neuroscience, cardiology): 30 TB. Volume estimated for Dec 2012: 5 PBs. iRODS - France Grille 31/01/12

Some informations For test accounts and questions: contact: nief@cc.in2p3.fr Documentation: https://www.irods.org/index.php/Main_Page Discussion list: irod-chat@googlegroups.com iRODS - France Grille 31/01/12