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 not longer idle as my CephFS cluster is now in production :)
On Tue, Sep 15, 2015 at 11:17 AM, Gregory Farnum <gfarnum@xxxxxxxxxx> wrote:
On Tue, Sep 15, 2015 at 9:10 AM, Barclay Jameson
<almightybeeij@xxxxxxxxx> 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 3 that means for every write 3 are
actually written.
First lets assume I have only one cephfs client writing data.
If this is total throughput then to get the maximum throughput for
what a client would see do I need to divide it by 3?
Else, if this is what my client sees then do I need to multiply this
by 3 to see what my maximum cluster throughput would be?
I believe this is client-facing IO. It's pretty simple to check if
you've got an idle cluster; run rados bench and see if they're about
the same or about three times as large. ;)
-Greg
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