storage revision 1.4
1 $NetBSD: storage,v 1.4 2009/01/26 05:09:25 agc Exp $ 2 3 NetBSD Storage Roadmap 4 ====================== 5 6 This is a small roadmap document, and deals with the storage and file 7 systems side of the operating system. 8 9 NetBSD 5.0 will ship with the following storage elements in place: 10 11 1. puffs/putter 12 2. ReFUSE 13 3. rump 14 4. RAIDframe 15 5. iSCSI target 16 6. iSCSI initiator 17 7. cgd 18 8. fss 19 9. journalling functionality for ffs 20 10. read/write support for UDF file systems 21 22 The following elements and projects are pencilled in for 6.0, but 23 please do not rely on them being there. 24 25 11. devfs 26 12. logical volume management 27 13. a native port of Sun's ZFS 28 14. ReFUSE-lowlevel 29 15. web-based management tools for storage subsystems 30 16. support for flash devices - NAND and MMC/SD 31 32 The timescales for 6.0 are not known at the present time, but we would 33 expect to branch 6.0 late in 2009, with a view to a 6.0 release in 34 early 2010. 35 36 We'll continue to update this roadmap as features and dates get firmed up. 37 38 Some explanations 39 ================= 40 41 11. devfs 42 --------- 43 44 Devfs will allow device special files (the files used to access 45 devices) to be created dynamically as and when they are attached to 46 the system. This will greatly reduce the number of files in a /dev 47 directory and removes the need to run the MAKEDEV script when support 48 for new devices is added to the NetBSD kernel. NetBSD's devfs 49 implementation will also allow multiple instances of the file system 50 to be mounted simultaneously, which is very useful for chroot jails. 51 52 Responsible: mjf 53 54 9. Journalling Functionality for FFS 55 ------------------------------------- 56 57 Contributed by Wasabi Systems, Inc, technical review on tech-kern 58 in March 2008, merged to HEAD in July 2008, will be in NetBSD 5.0. 59 60 12. Logical Volume Management 61 ----------------------------- 62 63 Based on the Linux lvm2 and devmapper software, with a new kernel component 64 for NetBSD written. Merged in 5.99.5 sources, will be in 6.0. 65 66 Responsible: haad, martin 67 68 13. Native port of Sun's ZFS 69 ---------------------------- 70 71 Mostly completed by ad@, this is the FreeBSD port of Sun's ZFS, with 72 modifications to make it compile on NetBSD 5.0 by ad@, and based on 73 the original Sun code for the block layer, rather than the GEOM-based 74 layer. 75 76 Responsible: ad, many others 77 78 14. ReFUSE-lowlevel 79 ------------------- 80 81 FUSE has two interfaces, the normal high-level one, and a lower-level 82 interface which is closer to the way standard file systems operate. This 83 adds the low-level functionality in the same way that ReFUSE adds the 84 high-level functionality 85 86 Responsible: pooka, agc 87 88 15. Web-based Management tools for Storage Subsystems 89 ----------------------------------------------------- 90 91 Standard tools for managing the storage subsystems that NetBSD provides, 92 using a standard web-server as the basic user interface on the storage 93 device, allowing remote management by a standard web browser. 94 95 Responsible: agc 96 97 98 Alistair Crooks 99 Sun 25 Jan 2009 20:55:12 PST 100
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