Re: cephfs quotas

[Luis Henriques <lhenriques@suse.com>]

"Yan, Zheng" <zyan@redhat.com> writes:

>> On 12 Dec 2017, at 00:52, Luis Henriques <lhenriques@suse.com> wrote:
>> 
>> Hi,
>> 
>> [ and sorry for hijacking this old thread! ]
>> 
>> Here's a write-up of what I was saying earlier on the cephfs standup:
>> 
>> Basically, by using the ceph branch wip-cephfs-quota-realm branch[1] the
>> kernel client should have everything needed to implement client-side
>> enforced quotas (just like the current fuse client).  That branch
>> contains code that will create a new realm whenever a client sets a
>> quota xattr, and the clients will be updated with this new realm.
>> 
>> My first question would be: is there something on the kernel client to
>> handle this realms (a snaprealm) that is still missing?  As far as I
>> could understand from reading the code there's nothing missing -- it
>> should be possible to walk through the realms hierarchy as the kernel
>> client will always get the updated realms hierarchy from the MDS -- both
>> for snapshots and for this new 'quota realms'.  Implementing a 'quota
>> realms' PoC based on the RFC I sent out a few weeks ago shouldn't take
>> too long.  Or is there something obvious that I'm missing?
>> 
>
> For maintaining realm hierarchy on kclient, nothing is missing.

Awesome, that was my understanding as well.  Thanks a lot for
confirming!

Cheers,
-- 
Luis