On Fri, Sep 28, 2018, 7:16 PM Hetz Ben Hamo <hetz@hetz.biz> wrote:

Hi,

Gobinda, great work!

One thing though - the device names (sda, sdb etc..)

On many servers, it's hard to know which disk is which. Lets say I have 10 spinning disk + 2 SSD's. Which is sda? what about NVME? worse - sometimes replacing disks replaces the sda to something else. We used to have the same problem with NICs and now this has been resolved on CentOS/RHEL 7.X

Could the HCI part - the disk selection part specifically - give more details? maybe Disk ID or WWN, or anything that can identify a disk?

/dev/disk/by-id is the right identifier. 

During installation, it'd be nice if it could show as much data as possible - sdX, /dev/disk/by-id, size and perhaps manufacturer. 

Y. 

Also - SSD caching, most of the time it is recommended to use 2 drives if possible for good performance. Can a user select X number of drives?

Thanks

On Fri, Sep 28, 2018 at 6:43 PM Gobinda Das <godas@redhat.com> wrote:

Hi All,

 Status update on "Hyperconverged Gluster oVirt support"

Features Completed:

================

  cockpit-ovirt

  -------------

  1- Asymmetric brick configuration.Brick can be configured per host basis i.e. If the user wanted to make use of sdb from host1, sdc from host2, and sdd from host3.

  2- Dedupe and Compression integration via VDO support (see https://github.com/dm-vdo/kvdo). Gluster bricks are created on vdo devices

  3- LVM cache configuration support (Configure cache by using fast block device such as SSD drive to imrove the performance of a larger and slower logical volumes)

  4- Auto addition of 2nd and 3rd hosts in a 3 node setup during deployment

  5- Auto creation of storage domains based on gluster volumes created during setup

  6- Single node deployment support via Cockpit UI. For details on single node deployment - https://www.ovirt.org/documentation/gluster-hyperconverged/chap-Single_node_hyperconverged/

  7- Gluster Management Dashboard (Dashboard will show the nodes in cluster,Volumes and bricks. User can expand the cluster and also can create new volume in existing cluster nodes )

  oVirt

  -------

  1- Reset brick support from UI to allow users to replace a faulty brick

  2- Create brick from engine now supports configuring an SSD device as lvmcache device when bricks are created on spinning disks

  3- VDO monitoring

 GlusterFS

---------------

 Enhancements to performance with fuse by 15x

 1. Cluster after eager lock change for better detection of multiple clients

 2. Changing qemu option aio to "native" instead of "threads".

 end-to-end deployment:

 --------------------------------

 1- End to end deployment of a Gluster + Ovirt hyperconverged environment using ansible roles ( https://github.com/gluster/gluster-ansible/tree/master/playbooks ). The only pre-requisite is a CentOS node/oVirt node

Future Plan:

==========

 cockpit-ovirt:

  1- ansible-roles integration for deployment

  2- Support for different volume types 

   

 vdsm:

  1- Python3 compatibility of vdsm-gluster

  2- Native 4K support

--

Thanks,

Gobinda

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