diff options
| author | Dustin Black <dblack@redhat.com> | 2016-05-25 16:30:48 -0400 |
|---|---|---|
| committer | Niels de Vos <ndevos@redhat.com> | 2016-06-07 18:36:58 -0700 |
| commit | 7d3cb8f729297137e5d84b28cce7507a9ca48f12 (patch) | |
| tree | 7c8c772fde71d647ccd2fe854446553f668c0383 /doc | |
| parent | 445a3b741db8bb89fa126c3082ceda92732a5df9 (diff) | |
Added release notes for Tiering aware Geo-replication
Change-Id: I0041d983aa1ff98e1e52c559af1517b17db2526b
BUG: 1317278
Signed-off-by: Dustin Black <dblack@redhat.com>
Reviewed-on: http://review.gluster.org/14571
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
Smoke: Gluster Build System <jenkins@build.gluster.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/release-notes/3.8.0.md | 33 |
1 files changed, 30 insertions, 3 deletions
diff --git a/doc/release-notes/3.8.0.md b/doc/release-notes/3.8.0.md index 0510d05772b..58059fe5e33 100644 --- a/doc/release-notes/3.8.0.md +++ b/doc/release-notes/3.8.0.md @@ -31,9 +31,36 @@ Building directly from the git repository has not changed. ### FIXME: insert more useful release notes here -#### SEEK -*Notes for users:* All modern filesystems support SEEK_DATA and SEEK_HOLE with the lseek() systemcall. This improves performance when reading sparse files. GlusterFS now supports the SEEK operation as well. Linux kernel 4.5 comes with an improved FUSE module where lseek() can be used. QEMU can now detect holes in VM images when using the Gluster-block driver. -*Limitations:* The deprecated stripe functionality has not been extended with SEEK. SEEK for sharding has not been implemented yet, and is expected to follow later in a 3.8 update (bug 1301647). NFS-Ganesha will support SEEK over NFSv4 in the near future, posisbly with the upcoming nfs-ganesha 2.4. +### SEEK +*Notes for users:* All modern filesystems support SEEK_DATA and SEEK_HOLE with +the lseek() systemcall. This improves performance when reading sparse files. +GlusterFS now supports the SEEK operation as well. Linux kernel 4.5 comes with +an improved FUSE module where lseek() can be used. QEMU can now detect holes in +VM images when using the Gluster-block driver. + +*Limitations:* The deprecated stripe functionality has not been extended with +SEEK. SEEK for sharding has not been implemented yet, and is expected to follow +later in a 3.8 update (bug 1301647). NFS-Ganesha will support SEEK over NFSv4 in +the near future, posisbly with the upcoming nfs-ganesha 2.4. + +#### Tiering aware Geo-replication +*Notes for users:* +Tiering moves files between hot/cold tier bricks. +Geo-replication syncs files from bricks in Master volume to Slave volume. +With this, Users can configure geo-replication session in a Tiering based volume. + +*Limitations:* +Configuring geo-replication session in Tiering based volume is same as earlier. +But, before attaching / detaching tier few steps needs to be followd: + +Before attaching a tier to a volume with existing geo-replication session, the session needs to be stopped. +Please find detailed steps here: +https://access.redhat.com/documentation/en-US/Red_Hat_Storage/3.1/html/Administration_Guide/chap-Managing_Data_Tiering-Attach_Volumes.html#idp11442496 + +While detaching a tier from a Tiering based volume with existing geo-replication session, checkpoint of session needs to be done. +Please find detailed steps here: +https://access.redhat.com/documentation/en-US/Red_Hat_Storage/3.1/html/Administration_Guide/chap-Managing_Data_Tiering-Detach_Tier.html#idp32905264 + ## Bugs addressed |