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[News] Linux Gets Another New Filesystem from Nokia (UBI)

  • Subject: [News] Linux Gets Another New Filesystem from Nokia (UBI)
  • From: Roy Schestowitz <newsgroups@xxxxxxxxxxxxxxx>
  • Date: Sat, 29 Mar 2008 03:24:08 +0000
  • Newsgroups: comp.os.linux.advocacy
  • Organization: Freelance
  • User-agent: KNode/0.10.4
UBI File System

,----[ Quote ]
| "Here is a new flash file system developed by Nokia engineers with help from 
| the University of Szeged. The new file-system is called UBIFS, which stands 
| for UBI file system. UBI is the wear-leveling/ bad-block handling/volume 
| management layer which is already in mainline (see drivers/mtd/ubi)," began 
| Artem Bityutskiy. He explained that UBIFS is stable and "very close to being 
| production ready", aiming to offer improved performance and scalability 
| compared to JFFS2 by implementing write-back caching, and storing a 
| file-system index rather than rebuilding it each time the media is mounted.        
`----

http://kerneltrap.org/Linux/UBI_File_System

Filesystems are still one of those areas where Linux is far ahead of Apple and
Microsoft. In Linux, it's all taken for granted because it just works (no
defragmentation needed, for example). And that's just the purpose of the
kernel. If it's good, you never think about it. It just serves the
applications well, without crashing or requiring attention.


Related:

Using MySQL as a filesystem

,----[ Quote ]
| With MySQLfs you can store a filesystem inside a MySQL relational database. 
| MySQLfs breaks up the byte content of files that you store in its filesystem 
| into tuples in the database, which allows you to store large files in the 
| filesystem without requiring the database to support extremely large BLOB 
| fields. With MySQLfs you can throw a filesystem into a MySQL database and 
| take advantage of whatever database backup, clustering, and replication setup 
| you have to protect your MySQLfs filesystem.      
`----

http://www.linux.com/feature/127055


ext4 Implementation

,----[ Quote ]
| One major feature present in Fedora 9 will be the ext4 implementation. The 
| new filesystem will not be the default for the distro, but will be available 
| for users and systems administrators to enable. New functionality includes 
| larger capacities and online defragmentation, for better performance and more 
| reliability. To find out more, we talked with Eric Sandeen, Fedora project 
| member and filesystem developer at Red Hat.     
`----

http://fedoraproject.org/wiki/Interviews/EricSandeen


A better ext4 filesystem for Linux

,----[ Quote
| A new Linux filesystem gets rid of the 256-petabyte limit, and adds a 
| checksum feature for the journal. But developers want you to know that it's 
| not yet ready for production sytems.   
`----

http://www.linuxworld.com/news/2008/012908-kernel.html


ext4 2.6.25 Merge Plans

,----[ Quote ]
| "The following patches have been in the -mm tree for a while, and I plan to 
| push them to Linus when the 2.6.25 merge window opens," began Theodore Ts'o, 
| offering the patches for review before they are merged.  
`---- 

http://kerneltrap.org/Linux/Ext4_2.6.25_Merge_Plans


ZFS, XFS, EXT4 Filesystems Compared

,----[ Quote ]
| EXT4 is fast for metadata operations, tar, untar, cpio, and postmark. EXT4 is 
| much faster than the others under FFSB. EXT4 with hardware RAID and external 
| journal device is ludicrously fast. EXT4 seems to have a bad interaction with 
| software RAID, probably because mkfs fails to query the RAID layout when 
| setting the filesystem parameters.    
| 
| ZFS has excellent performance on metadata tests. ZFS has very bad sequential 
| transfer with hardware RAID and appalling sequential transfer with software 
| RAID. ZFS can copy the linux kernel source code in only 3 seconds! ZFS has 
| equal latency for read and write requests under mixed loads, which is good.   
| 
| XFS has good sequential transfer under Bonnie++. Oddly XFS has better 
| sequential reads when using an external journal, which makes little sense. Is  
| noatime broken on XFS? XFS is very slow on all the metadata tests. XFS takes 
| the RAID layout into consideration and it performs well on randomio with 
| hardware or software RAID.    
`----

http://tastic.brillig.org/%7Ejwb/zfs-xfs-ext4.html


First benchmarks of the ext4 file system

,----[ Quote ]
| The ext4 file system promises improved data integrity
| and performance, together with less limitations, and is
| definitely the step in the right way. Even if there are
| some regressions in our measurements, when compared to
| ext3, they're quite small and no doubt will be fixed
| before the development is finished. On the other hand,
| under some workloads ext4 is already showing much better
| results.
`----

http://linux.inet.hr/first_benchmarks_of_the_ext4_file_system.html


Could Oracle Crash Sun's ZFS Party

,----[ Quote ]
| Even the proud Linus Torvalds has admitted that something like ZFS is a 
| technology worth having. If Oracle's Btrfs matures to a point where it was 
| comparable to ZFS then it would neutralise one percieved advantage of Solaris 
| of the Linux kernel.   
`----

http://g-campbell.blogspot.com/2008/02/could-oracle-crash-suns-zfs-party.html


Kernel space: a better btrfs

,----[ Quote ]
| A powerful new filesystem for Linux already supports fast snapshots, 
| checksums for all data, and online resizing--and plans to add ZFS-style 
| built-in striping and mirroring.  
`----

http://www.linuxworld.com/news/2008/012208-kernel.html?fsrc=rss-linux-news


ext4 2.6.25 Merge Plans

,----[ Quote ]
| "The following patches have been in the -mm tree for a while, and I plan to 
| push them to Linus when the 2.6.25 merge window opens," began Theodore Ts'o, 
| offering the patches for review before they are merged.  
`---- 

http://kerneltrap.org/Linux/Ext4_2.6.25_Merge_Plans


Btrfs Online Resizing, Ext3 Conversion, and More

,----[ Quote ]
| Chris Mason announced version 0.10 of his new Btrfs filesystem, listing the 
| following new features, "explicit back references, online resizing (including 
| shrinking), in place conversion from Ext3 to Btrfs, data=ordered support, 
| mount options to disable data COW and checksumming, and barrier support for 
| sata and IDE drives".     
`----

http://kerneltrap.org/Linux/Btrfs_Online_Resizing_Ext3_Conversion_and_More


Linux: Btrfs, File Data and Metadata Checksums

,----[ Quote ]
| Chris Mason announced an early alpha release of his new Btrfs 
| filesystem, "after the last FS summit, I started working on a new 
| filesystem that maintains checksums of all file data and metadata." He 
| listed the following features as "mostly implemented": "extent based file 
| storage (2^64 max file size), space efficient packing of small files, 
| space efficient indexed directories, dynamic inode allocation, writable 
| snapshots, subvolumes (separate internal filesystem roots), checksums on  
| data and metadata (multiple algorithms available), very fast offline 
| filesystem check".        
`----

http://kerneltrap.org/node/8376

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