Very intensive I/O under mon process

2013-01-02 Thread Andrey Korolyov
I have just observed that ceph-mon process, at least bobtail one, has an extremely high density of writes - times above _overall_ cluster amount of writes, measured by qemu driver(and they are very close to be fair). For example, test cluster of 32 osds have 7.5 MByte/s of writes on each mon node

Re: Very intensive I/O under mon process

2013-01-02 Thread Joao Eduardo Luis
On 01/02/2013 03:40 PM, Andrey Korolyov wrote: I have just observed that ceph-mon process, at least bobtail one, has an extremely high density of writes - times above _overall_ cluster amount of writes, measured by qemu driver(and they are very close to be fair). For example, test cluster of 32

Re: Very intensive I/O under mon process

2013-01-02 Thread Andrey Korolyov
On Wed, Jan 2, 2013 at 8:00 PM, Joao Eduardo Luis joao.l...@inktank.com wrote: On 01/02/2013 03:40 PM, Andrey Korolyov wrote: I have just observed that ceph-mon process, at least bobtail one, has an extremely high density of writes - times above _overall_ cluster amount of writes, measured by

Re: Very intensive I/O under mon process

2013-01-02 Thread Sage Weil
On Wed, 2 Jan 2013, Andrey Korolyov wrote: On Wed, Jan 2, 2013 at 8:00 PM, Joao Eduardo Luis joao.l...@inktank.com wrote: On 01/02/2013 03:40 PM, Andrey Korolyov wrote: I have just observed that ceph-mon process, at least bobtail one, has an extremely high density of writes - times