Projects

From OpenZFS
Jump to navigation Jump to search

Active projects

Projects that are currently being worked on:

  • resumable send/receive ( Csiden is working on this)
  • Storage of small files in dnode ( Mahrens is working on this)
  • Raspberry Pi support ( ryao is working on this)
    • Based on ZFS on Linux, which already works on ARM
    • Some unresolved issues with running out of kernel virtual address space

Inter-platform coordination ideas

Ideas for projects that would help coordinate changes between platforms:

  • Mechanism for pull changes from one place to another
    • Make it easier to build, test, code review, and integrate ZFS changes into illumos
  • Cross-Platform Test Suite
    • One sourcebase rather than porting STF to every platform?
    • Maybe integrate XFS Test Suite
  • Userland ZFS
    • we already have ztest / libzpool
    • want to expand this to also be able to test more of zfs in userland
    • want to be able to run /sbin/zfs, /sbin/zpool against userland implementation
    • want to be able to run most of testrunner (and/or STF) test suite against userland implementation
  • ZFS (ZPL) Version Feature Flags
    • Import ZFS on Linux sa=xattr into Illumos
  • /dev/zfs ioctl interface versioning
    • Ensure that future additions/changes to the interface maintain maximum compatibility with userland tools
    • Enable FreeBSD Linux jails / Illumos lx brandz to use ZFS on Linux utilities
  • Port ZPIOS [1] to Illumos from ZFS on Linux
    • This requires a rewrite to stop using Linux interfaces.
  • Virtual machine images with OpenZFS (see discussion on talk page)
    • to easily try OpenZFS on a choice of distributions within a virtual machine
    • images could be built for running on public clouds
    • images for installing to real hardware

General feature ideas

  • ZFS Channel Programs
  • device removal
    • based on indirect vdevs, rather than bprewrite
  • Reflink[2] support
  • Unified ashift handling [3]
  • Raidz Hybrid Allocator (preferably compatible with pool version 29 for Solaris 10u11 compatibility)
  • 1MB blocksize (preferably compatible with pool version 32, as pool-feature-flag)
  • Replace larger ZIO caches with explicit pages.
    • Subproject: Document useful kernel interfaces for page manipulation on various platforms
  • Improved SPA namespace collision management
    • Mostly needed by virtual machine hosts
    • work in progress in Gentoo
    • Temporary pool names in zpool import [4]
    • Temporary pool names in zpool create
  • TRIM Support
    • Realtime TRIM
    • Freespace TRIM
      • Walk metaslab space maps and issue discard commands to the vdevs.
  • Platform agnostic encryption support (preferably compatible with pool version 30, as pool-feature-flag)
    • The early ZFS encryption code published in the zfs-crypto repository of OpenSolaris.org could be a starting point. A copy is available from Richard Yao upon request.
  • Deduplication improvements
    • Bloom Filter
    • Use dedicated kmem_cache for deduplication table entries (easy to implement; will reduce DDT entries from 512-bytes to 320-bytes).

Lustre feature ideas

The Lustre project supports the use of ZFS as an Object Storage Target. They maintain their own feature request page with ZFS project ideas. Below is a list of project ideas that are well defined, benefit Lustre and have no clear benefit outside of that context.