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167 lines
8.5 KiB
Markdown
167 lines
8.5 KiB
Markdown
Release Notes for GlusterFS 3.7.0
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## Major Changes and Features
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Documentation about major changes and features is included in the [`doc/features/`](https://github.com/gluster/glusterfs/tree/master/doc/features/) directory of GlusterFS repository.
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### Geo Replication
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Many improvements have gone in the geo replication. A detailed documentation about all the improvements can be found [here](https://github.com/kshithijiyer/glusterdocs/blob/master/docs/release-notes/geo-rep-in-3.7.md)
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### Bitrot Detection
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Bitrot detection is a technique used to identify an “insidious” type of disk error where data is silently corrupted with no indication from the disk to the
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storage software layer that an error has occurred. When bitrot detection is enabled on a volume, gluster performs signing of all files/objects in the volume and scrubs data periodically for signature verification. All anomalies observed will be noted in log files.
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For more information, refer [here](https://github.com/gluster/glusterfs-specs/blob/master/done/GlusterFS%203.7/BitRot.md).
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### Multi threaded epoll for performance improvements
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Gluster 3.7 introduces multiple threads to dequeue and process more requests from epoll queues. This improves performance by processing more I/O requests. Workloads that involve read/write operations on a lot of small files can benefit from this enhancement.
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For more information refer [here](https://github.com/gluster/glusterfs-specs/blob/master/done/GlusterFS%203.7/Small%20File%20Performance.md).
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### Volume Tiering [Experimental]
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Policy based tiering for placement of files. This feature will serve as a foundational piece for building support for data classification.
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For more information refer [here](https://github.com/gluster/glusterfs-specs/blob/master/done/GlusterFS%203.7/Data%20Classification.md).
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Volume Tiering is marked as an experimental feature for this release. It is expected to be fully supported in a 3.7.x minor release.
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### Trashcan
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This feature will enable administrators to temporarily store deleted files from Gluster volumes for a specified time period.
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For more information refer [here](https://github.com/gluster/glusterfs-specs/blob/master/done/GlusterFS%203.7/Trash.md).
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### Efficient Object Count and Inode Quota Support
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This improvement enables an easy mechanism to retrieve the number of objects per directory or volume. Count of objects/files within a directory hierarchy is stored as an extended attribute of a directory. The extended attribute can be queried to retrieve the count.
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For more information refer [here](https://github.com/gluster/glusterfs-specs/blob/master/done/GlusterFS%203.7/Object%20Count.md).
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This feature has been utilized to add support for inode quotas.
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For more details about inode quotas, refer [here](https://github.com/gluster/glusterfs-specs/blob/master/done/Features/quota-object-count.md).
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### Pro-active Self healing for Erasure Coding
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Gluster 3.7 adds pro-active self healing support for erasure coded volumes.
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### Exports and Netgroups Authentication for NFS
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This feature adds Linux-style exports & netgroups authentication to the native NFS server. This enables administrators to restrict access to specific clients & netgroups for volume/sub-directory NFSv3 exports.
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For more information refer [here](https://github.com/gluster/glusterfs-specs/blob/master/done/GlusterFS%203.7/Exports%20and%20Netgroups%20Authentication.md).
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### GlusterFind
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GlusterFind is a new tool that provides a mechanism to monitor data events within a volume. Detection of events like modified files is made easier without having to traverse the entire volume.
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For more information refer [here](../GlusterFS-Tools/glusterfind.md).
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### Rebalance Performance Improvements
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Rebalance and remove brick operations in Gluster get a performance boost by speeding up identification of files needing movement and a multi-threaded mechanism to move all such files.
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For more information refer [here](https://github.com/gluster/glusterfs-specs/blob/master/done/GlusterFS%203.7/Improve%20Rebalance%20Performance.md).
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### NFSv4 and pNFS support
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Gluster 3.7 supports export of volumes through NFSv4, NFSv4.1 and pNFS. This support is enabled via NFS Ganesha. Infrastructure changes done in Gluster 3.7 to support this feature include:
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- Addition of upcall infrastructure for cache invalidation.
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- Support for lease locks and delegations.
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- Support for enabling Ganesha through Gluster CLI.
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- Corosync and pacemaker based implementation providing resource monitoring and failover to accomplish NFS HA.
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For more information refer the below links:
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- [NFS Ganesha Integration](https://github.com/gluster/glusterfs-specs/blob/master/done/Features/glusterfs_nfs-ganesha_integration.md)
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- [Upcall Infrastructure](https://github.com/gluster/glusterfs-specs/blob/master/done/Features/upcall.md)
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- [Gluster CLI for NFS Ganesha](https://github.com/gluster/glusterfs-specs/blob/master/done/GlusterFS%203.7/Gluster%20CLI%20for%20NFS%20Ganesha.md)
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- [High Availability for NFS Ganesha](https://github.com/gluster/glusterfs-specs/blob/master/done/GlusterFS%203.7/HA%20for%20Ganesha.md)
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- [pNFS support for Gluster](https://github.com/gluster/glusterfs-specs/blob/master/done/Features/mount_gluster_volume_using_pnfs.md)
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pNFS support for Gluster volumes and NFSv4 delegations are in beta for this release. Infrastructure changes to support Lease locks and NFSv4 delegations are targeted for a 3.7.x minor release.
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### Snapshot Scheduling
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With this enhancement, administrators can schedule volume snapshots.
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For more information, see [here](https://github.com/gluster/glusterfs-specs/blob/master/done/GlusterFS%203.7/Scheduling%20of%20Snapshot.md).
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### Snapshot Cloning
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Volume snapshots can now be cloned to create a new writeable volume.
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For more information, see [here](https://github.com/gluster/glusterfs-specs/blob/master/done/GlusterFS%203.7/Clone%20of%20Snapshot.md).
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### Sharding [Experimental]
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Sharding addresses the problem of fragmentation of space within a volume. This feature adds support for files that are larger than the size of an individual brick. Sharding works by chunking files to blobs of a configurabe size.
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For more information, see [here](https://github.com/gluster/glusterfs-specs/blob/master/done/GlusterFS%203.7/Sharding%20xlator.md).
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Sharding is an experimental feature for this release. It is expected to be fully supported in a 3.7.x minor release.
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### RCU in glusterd
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Thread synchronization and critical section access has been improved by introducing userspace RCU in glusterd
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### Arbiter Volumes
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Arbiter volumes are 3 way replicated volumes where the 3rd brick of the replica is automatically configured as an arbiter. The 3rd brick contains only metadata which provides network partition tolerance and prevents split-brains from happening.
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For more information, see [here](https://github.com/gluster/glusterfs-specs/blob/master/done/Features/afr-arbiter-volumes.md).
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### Better split-brain resolution
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split-brain resolutions can now be also driven by users without administrative intervention.
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For more information, see the 'Resolution of split-brain from the mount point' section [here](https://github.com/gluster/glusterfs-specs/blob/master/done/Features/heal-info-and-split-brain-resolution.md).
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### Minor Improvements
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* Message ID based logging has been added for several translators.
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* Quorum support for reads.
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* Snapshot names contain timestamps by default.Subsequent access to the snapshots should be done by the name listed in `gluster snapshot list`
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* Support for `gluster volume get <volname>` added.
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* libgfapi has added handle based functions to get/set POSIX ACLs based on common libacl structures.
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### Known Issues
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* Enabling Bitrot on volumes with more than 2 bricks on a node is known to cause problems.
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* Addition of bricks dynamically to cold or hot tiers in a tiered volume is not supported.
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* The following configuration changes are necessary for qemu and samba integration with libgfapi to work seamlessly:
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~~~
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# gluster volume set <volname> server.allow-insecure on
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~~~
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Edit `/etc/glusterfs/glusterd.vol` to contain this line: `option rpc-auth-allow-insecure on`
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Post 1, restarting the volume would be necessary:
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~~~
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# gluster volume stop <volname>
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# gluster volume start <volname>
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~~~
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Post 2, restarting glusterd would be necessary:
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~~~
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# service glusterd restart
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~~~
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or
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~~~
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# systemctl restart glusterd
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~~~
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### Upgrading to 3.7.0
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Instructions for upgrading from previous versions of GlusterFS are maintained on [this page](../Upgrade-Guide/upgrade-to-3.7.md).
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