Resilient file system
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ReFS is a new file system developed by Microsoft as an advancement to NTFS. It provides high data availability, prevents data corruption, and supports large volumes of storage up to petabytes in size. ReFS uses checksums and auto-repair to ensure data integrity and resilience. While it improves upon NTFS in areas like storage capacity and self-healing of data errors, ReFS lacks some features of NTFS like deduplication, compression, and hard links.
Resilient file system
- 2. Introduction Features of ReFS Attributes of ReFS How ReFS works?? Improvements in NTFS Difference between ReFS and NTFS Symptoms of ReFS Failure Scalability of ReFS Petabytes of Storage in ReFS. Pros and Cons of ReFS Summary
- 3. ReFS is acronym for Resilient File System developed by Microsoft for Windows 8 Servers in advancement to the NTFS. ReFS has inherited some features from NTFS and has ignored some like Hardlink, Quotas, File Compression etc. ReFS provides high data availability and prevents data from being corrupted. ReFS supports high volume of storage.
- 4. ReFS provides resiliency to the data due to which data never gets corrupted. ReFS never takes the File System Offline. In Windows 8, ReFS will be introduced only as part of Windows Server 8, which is the same approach we have used for each and every file system. ReFS uses B+ file system structure.
- 5. Integrity Availability Scalability Proactive Error Identification Build In Resilience Reliability Data Stripping Compatibility
- 6. Maximum Size of Single File: 2^64-1 bytes Maximum no. of files in directory: 2^64 Maximum File Name Length: 32K 255 Unicode characters Maximum Path Length: 32K Maximum Storage Space: 4PB
- 7. Data Storage Integrity is maintained through “Data Verification and AutoCorrection” Of File System. CHKDSK is not applicable in ReFS as auto correction of corrupted data is done.
- 8. • The main improvement from NTFS to ReFS is that the time required for CHKDSK on corrupted volume is greatly reduced. • Windows Server 8 takes negligible time as compared to Windows Server 2008.
- 9. Functionality NTFS ReFS De Duplication Yes No Named Streams Yes No Object Ids Yes No File System Compression Yes No File Encryption Yes No Sparse Files Yes No Hard Links Yes No Quotas Yes No Maximum Size of Single File (264-1) bytes (264-1) bytes Maximum Size of Single Volume Roughly 256 TB Roughly 4.7 ZB (zettabytes) Support on Removable Media Yes No Maximum Path Length 32K 32K Boot to file system Yes No WDS Yes No
- 10. Although ReFS is made to resist failures, it itself can also fail. During ReFS failure, OS can’t access ReFS volume and error message is displayed. ReFS can’t be recovered…….Only Data Recovery is done.
- 11. As the amount and size of information that's stored on computers continues to speedily increase, ReFS is meant to work well with very massive information sets, petabytes and bigger. The ReFS on-disk format is intended to support volume sizes up to 2^78 bytes using 16KB cluster sizes whereas the Windows stack addresses permits 2^64 bytes. This format also supports 2^64-1 byte file sizes, 2^64 files during a directory, and also the same range of directories during a volume.
- 12. Storage Volume are used in combination with ReFS to increase the storage space . Collection of physical drives is called Just a Bunch of Drives Just a Bunch of Drives(JBOD) with Serial ATA and SCSI is used to store petabytes. Storage Spaces also supports common fault tolerance like data Stripping, Mirroring and Stripping with parity.
- 13. Pros CheckSum Metadata Consistency AutoRepair Resilience Scalability Integrity Cons No Recovery tool for ReFS No File Compression. No DeDuplication No Hardlinks No Quotas No File Conversion Support
- 14. ReFS is a future of file system. It provides many features like integrity, protection against data loss, scalability etc. But if few modifications are made in it, it can be made better. Being a new file system, it must support all the features of old file system like NTFS.