Feature Request - Support For thin provisioned block storage (iSCSI, FC... /SAN)

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Feature Request - Support For thin provisioned block storage (iSCSI, FC... /SAN) #645

Open nagilum99 opened 8 months ago

nagilum99 commented 8 months ago

While XenServer got it's proprietary GFS2, XCP-ng still lack the option of a thin-provisioned, modern, block storage. Many storage systems are connected via iSCSI or (probably lest often than iSCSI) Fibre Channel.

The current LVM/VHD-combo currently still lacks of:

2 TB limit
Thin provisioning (effiicient space usage)
Snapshots using TP (effiicient space usage and enabling big VMs to be snapshooted, migrated etc)

Due to performance reasons it was less of a thing with pure HDD storages, as it can easily end up in lots of fragments, but due to a steady increase of hybrid or even full-flash storages, it's barely a point anymore.

Still something to cach up with VMware and (now back) XenServer.

olivierlambert commented 7 months ago

Hi,

The GFS2 SR from XenServer is not production ready: it's based on SMAPIv3, without support for any migration path from SMAPIv1, no live storage migration, no backup/delta capability and so on.

But we have plans on our side: improving SMAPIv3 and build a driver for a shared block based. Maybe GFS2 is an option, maybe not.

nagilum99 commented 7 months ago

Is there any schedule for that? Even a rough one?

olivierlambert commented 7 months ago

First, getting one SMAPIv3 local driver available (matter of weeks now), then backup capabilities, then a migration path, then shared file based SR (NFS) and finally shared block (the hardest thing). No ETA because depends on previous steps.

gfac4hub commented 3 weeks ago

I see that this was discussed about 7 months ago. As you know, support for block storage on fibre channel and elimination of 2 TB limits would be a huge deal in supplanting other vendors dominance in the enterprise marketplace. I just wanted to check how things are going in moving towards this feature?