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 > 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 _overal

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 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 qemu driver(

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 o

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 h