[Gluster-Maintainers] Announcing Gluster release 9

[Rinku Kothiya]

Hi,

The Gluster community is pleased to announce the release of 9.0, our latest
release.

This is a major release that includes a range of code improvements and
stability fixes along with a few features as noted below. A selection of
the key features and changes are documented in this [1] page.



*Announcements:*
1. Releases that receive maintenance updates post release 9 are 8 and 9 [2]

2. Release 9 will receive maintenance updates around the 30th of every
month for the first 3 months post release (i.e Mar'21, Apr'21, May'21).
   Post the initial 3 months, it will receive maintenance updates every 2
months till EOL.

3. For upgrading to release 9 refer to the release 9 upgrade guide [3].

   Make sure you are not using any of the following deprecated features :

- Block device (bd) xlator
- Decompounder feature
- Crypt xlator
- Symlink-cache xlator
- Stripe feature
- Tiering support (tier xlator and changetimerecorder)
- Glupy


*Highlights of this release are:*

  *Added support for:*

- io_uring in Gluster (io_uring support in kernel required along with the
presence of liburing library and headers)
- support running with up to 5000 volumes (Testing done on: 5k volumes on 3
nodes, brick_mux was enabled with default configuration)


*Features:*

- Added io_uring support for Gluster
- Added Support for 5K volumes
- Enabled granular-entry-heal by default
- Optimizations for rename dir heal
- Added support for monitoring the epoll/rpc layer
- Brick mux: Added support to spawn a thread per process basis instead of
spawning a per brick
- Improve rebalance of sparse files
- LTO/GCC10 - Gluster is now compiled with LTO enabled by default



*Major issues:*

- None


Bugs addressed are provided towards the end, in the release notes [1]


Thank you,
Gluster community

*References:*

[1] Release notes:
     https://docs.gluster.org/en/latest/release-notes/9.0/

[2] Release schedule:
     https://www.gluster.org/release-schedule/

[3] Upgrade guide to release-9:
     https://docs.gluster.org/en/latest/Upgrade-Guide/upgrade-to-9/

[4] Packages:

     Packages that will be available :

https://github.com/gluster/glusterdocs/blob/master/docs/Install-Guide/Community-Packages.md

     Packages at :
     https://download.gluster.org/pub/gluster/glusterfs/9/9.0/
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