[doc][rfe] Need to call out Generic Driver limitations
Bug #1867950 reported by
Goutham Pacha Ravi
on 2020-03-18
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| | OpenStack Shared File Systems Service (Manila) |
Undecided
|
Unassigned | ||
Bug Description
The "Generic" backend/driver in Manila is a community maintained software defined storage backend/driver. It provisions and uses OpenStack compute (Nova) VMs as NFS/CIFS share servers and creates backing storage via Cinder volumes.
There are some limitations that need to be acknowledged for considering this driver in a production deployment of OpenStack Manila. Currently, there is no documentation on what these limitations are, besides the note that some Nova backends can only support 26 shares due to a limitation on the number of PCI devices [1]
[1] https:/
| Goutham Pacha Ravi (gouthamr) wrote : | #1 |
| Goutham Pacha Ravi (gouthamr) wrote : | #2 |
Some more notes on the SPOF issue can be found on this specification: https:/
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One of the limitations that severely affects availability in the cloud is the Single Point of Failure (SPOF) issue. The driver uses a Nova VM as its NAS (NFS/CIFS) server. If/When the server goes down, there is no way to continue serving data.