Yes, they're both delayed and a guesstimate: the OSDs send periodic
information to the monitors about the state of their PGs, which
includes amount of data read/written from them. The monitor
extrapolates the throughput at each report interval based on the pg
updates it received during that time.
-
Good point. I have seen some really weird numbers something like 7x my
normal client IO. This happens very rarely though.
On Tue, Sep 15, 2015 at 2:25 PM, Mark Nelson wrote:
> FWIW I wouldn't totally trust these numbers. At one point a while back I
> had ceph reporting 226GB/s for several second
I have a program that monitors the speed, and I have seen 1TB/s pop up and
there is just no way that is true.
Probably the way it is calculated is prone to extreme measurements, where
if you average it out you get a more realistic number.
On Tue, Sep 15, 2015 at 12:25 PM Mark Nelson wrote:
> FWI
FWIW I wouldn't totally trust these numbers. At one point a while back
I had ceph reporting 226GB/s for several seconds sustained. While that
would have been really fantastic, I suspect it probably wasn't the case. ;)
Mark
On 09/15/2015 11:25 AM, Barclay Jameson wrote:
Unfortunately, it's no
Unfortunately, it's not longer idle as my CephFS cluster is now in production :)
On Tue, Sep 15, 2015 at 11:17 AM, Gregory Farnum wrote:
> On Tue, Sep 15, 2015 at 9:10 AM, Barclay Jameson
> wrote:
>> So, I asked this on the irc as well but I will ask it here as well.
>>
>> When one does 'ceph -s
On Tue, Sep 15, 2015 at 9:10 AM, Barclay Jameson
wrote:
> So, I asked this on the irc as well but I will ask it here as well.
>
> When one does 'ceph -s' it shows client IO.
>
> The question is simple.
>
> Is this total throughput or what the clients would see?
>
> Since it's replication factor of
So, I asked this on the irc as well but I will ask it here as well.
When one does 'ceph -s' it shows client IO.
The question is simple.
Is this total throughput or what the clients would see?
Since it's replication factor of 3 that means for every write 3 are
actually written.
First lets assum
