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  • 1. Zettabyte File Storage Systems Sameer Deshmukh Shri Guru Gobind Singhji Insitute of Engineering and Technology Nanded
  • 2. Overview
    • Introduction
    • Evolution History
    • Design Issues in ZFS
    • Actual ZFS
    • Benefits of ZFS
    • ZFS Limitations
    • Supported Platforms
    • Conclusion
    • References
  • 3. Motivation
    • ZFS an innovative approach in area of File Systems.
    • ZFS is proved as Desktop to Data center.
    • One of the Open Source Revolution.
  • 4. Introduction
    • ZFS Playing an important role in IT industry.
    • Advanced than existing File Systems.
    • Sooner will be spreading to UNIX, Linux or may be Windows.
    • Immense Capacity.
    • Simple Administration
    • Provides Data Integrity.
    • Performance
  • 5. Historical Perspective.
    • 80 great minds Led by Jeff Bonwick
    • developed ZFS.
    • Actual implementation started in year 2000.
    • Announced on September 14,2004.
    • Released on November 16,2005.
    • Included in Sun Solaris on 06/06.
  • 6. Design Issues In ZFS .
    • Simplified Administration
    • Main Task of Administrator.
    • Sometimes may prone to errors.
    • Solaris best option.
    • Allows administrator to state his intent rather than to implement it.
    • Reduced no of tasks and reduced time.
  • 7.
    • Cannot guarantee correct data End to end data integrity
    • Hard to manage in slices Any number of slices
    • Not Flexible and platform Flexible and platform
    • dependent independent.
    • Lack one to one association One to one association
    Pooled Storage
  • 8. Data Integrity and Security .
    • Disk should avoid corruption or rot or malicious
    • In past dealing with file systems was like a nightmare
    • Earlier version of UFS.
    • ‘ fsck’ command .
    • Mirrored disks
    • Direct Region Logging (DRL)
  • 9. Capacity of ZFS
    • 128 bit file system
    • 2^128, or 10^38 allocation units
    • Nearly 256 Quadrillion Zettabytes
    • 1 ZB = 1 billion TB
  • 10. The Zettabyte File System
    • Storage Model
  • 11. Storage Pool Allocator
    • Allocates block from all devices in a storage pool
    • SPA presents itself as interface to allocate and free virtually addressed blocks
    • DVA ( Data Virtual Addresses)
    • DVA allows dynamic addition and removal of devices from storage pool
    • SPA also simplifies administration
    • Uses 128-bit block addresses, so each storage pool can address up to 256 quadrillion blocks
  • 12. Error detection and Correction
    • Block check summed before written to disk
    • Check summed stored in parent block.
    • Entire pool self validating
    • Also allows self healing in some circumstances
    • Virtual Device
      • SPA allows mirroring, stripping,cocatenation
      • Virtual device driver called vdews
      • vedws has routines to implement a particular feature
  • 13. Block Allocation devices
    • Dynamic Stripping to increase bandwidth
    • Slab Allocator to allocator
    • Metaslabs useful as performance increases
    • Slab Allocator provides Copy-On-Write Transaction
    • Slab Allocator prevents fragmentation of memory
  • 14. Data Management Unit
    • DMA consumes blocks from SPA and exports objects
    • Identification by 64 bit and contains 2^64 bytes of data along with all the manipulations
    • On disk data is consistent
    • Uberblock
    • Uberblock mechanism
    • Dynamic allocation of metadata is easier
    • Advantages of DMU
  • 15. Block Allocation devices
  • 16. ZFS POSIX Layer
    • ZPL makes DMU objects as like POSIX file systems
    • Implements as like POSIX acts
    • As transaction continues so no inconsistency is present on disk state
    • No need to use mkfs command to create file systems
    • Consist of logs due to which tracks of record is kept
    • The intent log can log either to disk or to NVRAM.
  • 17. Benefits of ZFS
    • The Future Proof File System
    • Cutting-Edge Data Integrity
    • Near Platter Speed
    • Volume Management is a Thing of the Past.
    • Reduced Costs
    • Compatibility
  • 18. ZFS Limitations
    • No BOOT Support.
    • Lacks Transparent Encryption.
    • Currently have n+1 redundancy.
    • N+ 2 redundancy only in Development Environment.
  • 19. Supported Platforms
    • Sun SOLARIS OS.
    • Available on SPARC and X86.
    • Apple to interested to port in MAC OS.
    • Linux too will have it in nearby future.
    • Porting to Free BSD is in progress
  • 20. Conclusion
    • Easy and automated manageability.
    • Data security and integrity.
    • Virtually unlimited scalability.
    • Services for demanding applications today and well into future.
  • 21. Hey! Administrator you need not dig it or monitor it As I have Solaris ZFS
  • 22. References
    • ZFS overview- http://www.opensolaris.org/os/community/zfs/porting
    • ZFS overview part 2- http://www.opensolaris.org/os/community/zfs/porting/zfs_part2_ease.html
    • The Zettabyte file systems- Jeff Bonwick, Matt Ahrens, Val Henson, Mark Maybee, and Mark Shellenbaum 2002
    • Jeff Bonwick.-The slab allocator: An object-caching kernel memory allocator.Proceedings of the 1994 USENIX Summer Technical Conference, 1994.
    • Sun Says File Systems Are An Important Differentiator http://www.itjungle.com/subs/ Breaking News.html
  • 23.
    • Open Solaris forum- http://src.opensolaris.org/
    • http://www.opensolaris.org/os/downloads/
    • http://www.opensolaris.org/os/community/zfs/docs /
    • Solaris ZFS most advanced file systems on planet. -http://www.repton.co.uk/
    • HELIOS Software GmbH - Sun Solaris 10 ZFS offers blazing file system performance-http://www.helios.de/news/
  • 24. Q ‘n’ A
  • 25. Thank You!