storage revision 1.5
1 $NetBSD: storage,v 1.5 2009/09/15 21:07:58 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 The following elements and projects are pencilled in for 6.0, but 10 please do not rely on them being there. 11 12 1. devfs 13 2. logical volume management 14 3. a native port of Sun's ZFS 15 4. ReFUSE-lowlevel 16 5. web-based management tools for storage subsystems 17 6. support for flash devices - NAND and MMC/SD 18 7. rump extensions 19 8. virtualised disks in userland 20 9. in-kernel iSCSI initiator 21 22 We currently expect to branch 6.0 in the March 2010 timeframe, with a view 23 to a 6.0 release later in 2010. 24 25 We'll continue to update this roadmap as features and dates get firmed up. 26 27 Some explanations 28 ================= 29 30 1. devfs 31 --------- 32 33 Devfs will allow device special files (the files used to access 34 devices) to be created dynamically as and when they are attached to 35 the system. This will greatly reduce the number of files in a /dev 36 directory and removes the need to run the MAKEDEV script when support 37 for new devices is added to the NetBSD kernel. NetBSD's devfs 38 implementation will also allow multiple instances of the file system 39 to be mounted simultaneously, which is very useful for chroot jails. 40 Please contact core@ if you are interested in devfs development. 41 42 Responsible: mjf 43 44 2. Logical Volume Management 45 ---------------------------- 46 47 Based on the Linux lvm2 and devmapper software, with a new kernel component 48 for NetBSD written. Merged in 5.99.5 sources, will be in 6.0. 49 50 Responsible: haad, martin 51 52 3. Native port of Sun's ZFS 53 --------------------------- 54 55 Two Summer of Code projects have been held, concentrating on the 56 provision of ZFS support for NetBSD. Mostly completed by haad, and 57 building on ver's work, this is the port of Sun's ZFS, with 58 modifications to make it compile on NetBSD by ad@, and based on the 59 Sun code for the block layer. Discussions are still taking place to 60 get the design right for support for the openat(2) system call family, 61 and the correct architecture for reclaiming vnodes. 62 63 The ZFS source code has been committed to the repository. 64 65 Responsible: haad, ad, ver 66 67 4. ReFUSE-lowlevel 68 ------------------ 69 70 FUSE has two interfaces, the normal high-level one, and a lower-level 71 interface which is closer to the way standard file systems operate. This 72 adds the low-level functionality in the same way that ReFUSE adds the 73 high-level functionality 74 75 Responsible: pooka, agc 76 77 5. Web-based Management tools for Storage Subsystems 78 ---------------------------------------------------- 79 80 Standard tools for managing the storage subsystems that NetBSD provides, 81 using a standard web-server as the basic user interface on the storage 82 device, allowing remote management by a standard web browser. 83 84 Responsible: agc 85 86 6. Support for flash devices - NAND and MMC/SD 87 ---------------------------------------------- 88 89 The NetBSD Foundation is interested in having a file system which is 90 optimised to work with today's flash devices, including SSDs both with 91 wear-levelling functionality and without, as well as support for NAND, 92 and MMC/SD devices. Please get in touch with core@ if you're interested 93 in helping out with this area of development. 94 95 Responsible: TBD 96 97 7. RUMP Extensions 98 ------------------ 99 100 Rump support has been in NetBSD for 2 releases now, and continues to be 101 developed actively. Recent additions have included cgd support, and smbfs 102 client support. 103 104 Responsible: pooka 105 106 8. Virtualised disks in Userland 107 -------------------------------- 108 109 For better support of virtualization, a library which provides a consistent 110 view of virtualized disk images has been developed by jmcneill. 111 112 Responsible: jmcneill 113 114 9. In-kernel iSCSI Initiator 115 ---------------------------- 116 117 NetBSD has had a userland implementation of an iSCSI initiator since 118 NetBSD 4.99.35, based on ReFUSE. There is a possibility that an 119 in-kernel initiator may be available - please contact core if you are 120 interested in this functionality. 121 122 Responsible: core 123 124 125 Alistair Crooks 126 Tue 15 Sep 2009 08:44:14 PDT 127
Indexes created Thu Oct 23 22:10:10 GMT 2025