Re: CephFS as replacement for NFS and NBD

Hi Markus,

thank you for your input.

First, could you point us to issues about dconf on NFS?
I think some people in the list are using NFS, they'd want to know.

About Ceph, it might indeed be useful for LTSP, and maybe even more in 
the future, if programs start relying on blazing fast SSD speeds.
No network could match 500 MB/sec (5 gbps) per client.
On the other hand, maybe some local cache there will be enough.

So, patches about Ceph == welcome, but personally I don't have the 
required time to work on this.

Ditching LDM in favor of normal, pam-aware DMs,
supporting UEFI clients,
supporting IPv6,
supporting Wayland...
...are more of a priority for me.

Best,
Alkis


On 2/7/19 1:06 AM, Markus Kienast wrote:
> Hi Alkis,
> 
> I recently discovered, that dconf has limitations with NFS, which got me 
> thinking about network storage and LTSP in general.
> 
>  From another project I have gathered quite some experience with CephFS 
> and Rados Block Devices - a distributed network storage software, which 
> could prove quite useful for LTSP as well.
> 
> The underlaying technology is called Rados, it is the actual distributed 
> storage layer and on top of that the project provides a Block Layer, a 
> Network FS layer and an object storage layer with an S3 and Swift interface.
> 
> CephFS (full POSIX compliance) could replace NFS and
> Rados Block Devices could replace NBD.
> 
> Expecially in clustered setups, this would provide some advantages.
> * redundancy
> * more clients could be sustained, due to its distributed nature
> * might even be possible to use some clients as additional distributed 
> storage nodes if they have HDDs
> Please let me know, what you think about that.
> 
> https://ceph.com/
> 


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