automount would probably work for you.
From: Up Safe [mailto:upands...@gmail.com]
Sent: Tuesday, 22 May 2018 12:33 AM
To: David Turner
Cc: Adrian Saul ; ceph-users
Subject: Re: [ceph-users] multi site with cephfs
I'll explain.
Right now we have 2 sites (racks) with several dozens of servers at
Den mån 21 maj 2018 kl 18:28 skrev Up Safe :
> I don't believe I have this kind of behavior.
> AFAIK, files are created or modified by only 1 client at a time.
>
Make sure that this is the case then, its _very_ easy to start out with
something along the lines of "right now I cannot image this" an
for our usage but is noticeably
>>>>>> slower
>>>>>> than comparable local ceph based RBD shares.
>>>>>>
>>>>>>
>>>>>>
>>>>>> Essentially we just setup the ceph pools behind cephFS to ha
cephFS to have
>>>>> replicas on each site. To export it we are simply using Linux kernel NFS
>>>>> and it gets exported from 4 hosts that act as CephFS clients. Those 4
>>>>> hosts are then setup in an DNS record that resolves to all 4 IPs, and
d cluster of about
>>>>>>> 40km with redundant 10G fibre between sites – link latency is in the
>>>>>>> order
>>>>>>> of 1-2ms. Performance is reasonable for our usage but is noticeably
>>>>>>> slower
>>>>>&
mparable local ceph based RBD shares.
>>>>>>
>>>>>>
>>>>>>
>>>>>> Essentially we just setup the ceph pools behind cephFS to have
>>>>>> replicas on each site. To export it we are simply using Linux kernel NFS
>
;> and it gets exported from 4 hosts that act as CephFS clients. Those 4
>>>>> hosts are then setup in an DNS record that resolves to all 4 IPs, and we
>>>>> then use automount to do automatic mounting and host failover on the NFS
>>>>> clients. Autom
and it
>>>> gets exported from 4 hosts that act as CephFS clients. Those 4 hosts are
>>>> then setup in an DNS record that resolves to all 4 IPs, and we then use
>>>> automount to do automatic mounting and host failover on the NFS clients.
>>>> Automo
>>>
>>>
>>>
>>> I stress this is a limited setup that we use for some fairly light duty,
>>> but we are looking to move things like user home directories onto this.
>>> YMMV.
>>>
>>>
>>>
>>>
>>>
oking to move things like user home directories onto this.
>> YMMV.
>>
>>
>>
>>
>>
>> *From:* ceph-users [mailto:ceph-users-boun...@lists.ceph.com] *On Behalf
>> Of *Up Safe
>> *Sent:* Monday, 21 May 2018 5:36 PM
>> *To:* David Turner
&
is a limited setup that we use for some fairly light duty,
> but we are looking to move things like user home directories onto this.
> YMMV.
>
>
>
>
>
> *From:* ceph-users [mailto:ceph-users-boun...@lists.ceph.com] *On Behalf
> Of *Up Safe
> *Sent:* Monday, 21 May 2018 5:3
-users-boun...@lists.ceph.com] On Behalf Of Up Safe
Sent: Monday, 21 May 2018 5:36 PM
To: David Turner
Cc: ceph-users
Subject: Re: [ceph-users] multi site with cephfs
Hi,
can you be a bit more specific?
I need to understand whether this is doable at all.
Other options would be using ganesha, but I
Hi,
can you be a bit more specific?
I need to understand whether this is doable at all.
Other options would be using ganesha, but I understand it's very limited on
NFS;
or start looking at gluster.
Basically, I need the multi site option, i.e. active-active read-write.
Thanks
On Wed, May 16, 20
Object storage multi-site is very specific to using object storage. It
uses the RGW API's to sync s3 uploads between each site. For CephFS you
might be able to do a sync of the rados pools, but I don't think that's
actually a thing yet. RBD mirror is also a layer on top of things to sync
between
But this is not the question here.
The question is whether I can configure multi site for CephFS.
Will I be able to do so by following the guide to set up the multi site for
object storage?
Thanks
On Wed, May 16, 2018, 16:45 John Hearns wrote:
> The answer given at the seminar yesterday was tha
The answer given at the seminar yesterday was that a practical limit was
around 60km.
I don't think 100km is that much longer. I defer to the experts here.
On 16 May 2018 at 15:24, Up Safe wrote:
> Hi,
>
> About a 100 km.
> I have a 2-4ms latency between them.
>
> Leon
>
> On Wed, May 16,
Hi,
About a 100 km.
I have a 2-4ms latency between them.
Leon
On Wed, May 16, 2018, 16:13 John Hearns wrote:
> Leon,
> I was at a Lenovo/SuSE seminar yesterday and asked a similar question
> regarding separated sites.
> How far apart are these two geographical locations? It does matter.
>
>
Leon,
I was at a Lenovo/SuSE seminar yesterday and asked a similar question
regarding separated sites.
How far apart are these two geographical locations? It does matter.
On 16 May 2018 at 15:07, Up Safe wrote:
> Hi,
>
> I'm trying to build a multi site setup.
> But the only guides I've found
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