Behalf Of Liu,
Ming (HPIT-GADSC)
Sent: Thursday, April 30, 2015 11:25 AM
To: ceph-users@lists.ceph.com
Subject: [ceph-users] basic questions about Ceph
Hello,
I have a dumb question about Ceph, hope someone can help me.
I learned that on the bottom layer, there is a RADOS, which is an object
sto
Hello,
I have a dumb question about Ceph, hope someone can help me.
I learned that on the bottom layer, there is a RADOS, which is an object
storage layer. So as for me, it is basically an interface that one can save a
key/value object in each write operation. And each object will finally map to
thank you very much, Karan, for your explanation.
Regards
Pragya Jain
On Tuesday, 15 July 2014 1:53 PM, Karan Singh wrote:
>
>
>Hi Pragya
>
>
>Let me try to answer these.
>
>
>1# The decisions is based on your use case ( performance , reliability ) .If
>you need high performance out of yo
Hi Pragya
Let me try to answer these.
1# The decisions is based on your use case ( performance , reliability ) .If
you need high performance out of your cluster , the deployer will create a pool
on SSD and assign this pool to applications which require higher I/O. For Ex :
if you integrate op
thank you very much, Craig, for your clear explanation against my questions.
Now I am very clear about the concept of pools in ceph.
But I have two small questions:
1. How does the deployer decide that a particular type of information will be
stored in a particular pool? Are there any settings
hi all,
I have some very basic questions about pools in ceph.
According to ceph documentation, as we deploy a ceph cluster with radosgw
instance over it, ceph creates pool by default to store the data or the
deployer can also create pools according to the requirement.
Now, my question is:
1. w
On 07/26/2013 08:59 PM, John Wilkins wrote:
(d) If you have three monitors, Paxos will still work. 2 out of 3
monitors is a majority. A failure of a monitor means it's down, but
not out. If it were out of the cluster, then the cluster would assume
only two monitors, which wouldn't work with Paxos
John,
Thanks for the really insightful responses!
It would be nice to know what the dominant deployment scenario for the
native case (my question (c)).
Do they usually end up with something like OCFS2 on top of RBD for the
native case, or do they go with the CephFS?
Thanks,
Hari
On Fri, Jul 26
(a) This is true when using ceph-deploy for a cluster. It's one Ceph
Monitor for the cluster on one node. You can have many Ceph monitors,
but the typical high availability cluster has 3-5 monitor nodes. With
a manual install, you could conceivably install multiple monitors onto
a single node for t
Hi John,
Thanks for the responses.
For (a), I remember reading somewhere that one can only run a max of 1
monitor/node, I assume that that implies the single monitor process will be
responsible for ALL ceph clusters on that node, correct?
So (b) isn't really a Ceph issue, that's nice to know. An
Hi folks,
Some very basic questions.
(a) Can I be running more than 1 ceph cluster on the same node (assume that
I have no more than 1 monitor/node, but storage is contributed by one node
into more than 1 cluster)
(b) Are there any issues with running Ceph clients on the same node as the
other Ce
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