Re: Will multi-monitor speed up pg initializing?

2013-01-23 Thread Sage Weil 
On Wed, 23 Jan 2013, Chen, Xiaoxi wrote:
 
 Hi list,
  When first time I start my ceph cluster,it takes more than 15 
 minutes to get all the pg activeclean. It's fast at first (say 100pg/s) but 
 quite slow when only hundreds of PG left peering.
  Is it a common situation? Since there is quite a few disk IO and 
 network IO during this time, what stop osd from faster initialize?
  Can multi-monitor do any help with this?

How many PGs and OSDs?  Do the OSDs come up at the same time, or is there 
a small number of OSDs that initially get all PGs?

sage

Will multi-monitor speed up pg initializing?

2013-01-22 Thread Chen, Xiaoxi 

Hi list,
 When first time I start my ceph cluster,it takes more than 15 minutes 
to get all the pg activeclean. It's fast at first (say 100pg/s) but quite slow 
when only hundreds of PG left peering.
 Is it a common situation? Since there is quite a few disk IO and 
network IO during this time, what stop osd from faster initialize?
 Can multi-monitor do any help with this?
 
 Thanks.


 Xiaoxi
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