storage revision 1.2
1 $NetBSD: storage,v 1.2 2008/08/04 15:39:46 simonb 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 20 The following elements and projects are pencilled in for 5.0, but 21 please do not rely on them being there. 22 23 9. pud 24 10. devfs 25 11. journalling functionality for ffs 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 17. read/write support for UDF file systems 32 33 We are working on the following elements, and expect them to be in 6.0: 34 35 18. OSD (object storage device) 36 19. basic FCIP support 37 38 We expect to branch for the 5.0 release in April or May 2008, which would 39 put a NetBSD 5.0 Release date in Q4 2008. An annual release cycle would 40 thus mean that 6.0 would be branched in April or May 2009. 41 42 Pictorially, this looks like: 43 44 2008 2009 45 Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug 46 |===|===|===|===|===|===|===|===|===|===|===|===|===|===|===|===|===|===|===| 47 48 | ------- 5.0 --------- | | ------- 6.0 49 branch release branch 50 51 1-8 11,16 9,10,12,13,14,17 15 18 19 52 53 We'll continue to update this roadmap as features and dates get firmed up. 54 55 56 Some explanations 57 ================= 58 59 10. devfs 60 --------- 61 62 Devfs will allow device special files (the files used to access 63 devices) to be created dynamically as and when they are attached to 64 the system. This will greatly reduce the number of files in a /dev 65 directory and removes the need to run the MAKEDEV script when support 66 for new devices is added to the NetBSD kernel. NetBSD's devfs 67 implementation will also allow multiple instances of the file system 68 to be mounted simultaneously, which is very useful for chroot jails. 69 70 Responsible: mjf 71 72 11. Journalling Functionality for FFS 73 ------------------------------------- 74 75 Contributed by Wasabi Systems, Inc, technical review on tech-kern 76 in March 2008, merged to HEAD in July 2008, will be in NetBSD 5.0. 77 78 12. Logical Volume Management 79 ----------------------------- 80 81 Based on the Linux lvm2 and devmapper software, with a new kernel component 82 for NetBSD written. 83 84 Responsible: haad, martin 85 86 13. Native port of Sun's ZFS 87 ---------------------------- 88 89 Mostly completed by ad@, this is the FreeBSD port of Sun's ZFS, with 90 modifications to make it compile on NetBSD 5.0 by ad@, and based on 91 the original Sun code for the block layer, rather than the GEOM-based 92 layer. 93 94 Responsible: oster, agc 95 96 14. ReFUSE-lowlevel 97 ------------------- 98 99 FUSE has two interfaces, the normal high-level one, and a lower-level 100 interface which is closer to the way standard file systems operate. This 101 adds the low-level functionality in the same way that ReFUSE adds the 102 high-level functionality 103 104 Responsible: pooka, agc 105 106 15. Web-based Management tools for Storage Subsystems 107 ----------------------------------------------------- 108 109 Standard tools for managing the storage subsystems that NetBSD provides, 110 using a standard web-server as the basic user interface on the storage 111 device, allowing remote management by a standard web browser. 112 113 Responsible: agc 114 115 16. OSD 116 ------- 117 118 Based on the T10 specification, and the Intel reference code. An Object 119 Storage Device, where some of the functionality of a file system is placed 120 in the storage device. 121 122 Responsible: agc 123 124 125 Alistair Crooks 126 Sun Mar 2 23:31:03 GMT 2008 127
Indexes created Thu Oct 23 22:10:10 GMT 2025