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The OSDs should be marked down within about 30 seconds. Can you
provide additional information such as ceph version and the ceph.conf
file.

Thanks,

- ----------------
Robert LeBlanc
PGP Fingerprint 79A2 9CA4 6CC4 45DD A904  C70E E654 3BB2 FA62 B9F1

On Thu, Aug 27, 2015 at 12:23 AM, [email protected]  wrote:
Hi,
I'm testing ceph feature,and now have a probem make me confused.

Network construction is as shown in the figure below:
  serverB is primary monitor , it has 5 osds
  serverC is secondary monitor, it has 5 osds
  serverD is tertiary monitor,it has 5 osds
  client A use a rbd block via 'rbd map' command.

When shutdown serverB(primary monitor), input ‘ceph osd tree’ on
serverC or serverD will show all the osd is up and in, At this time
,if input ‘rbd create aaa –size 100’, it will block, after neally 18
minutes, osds on serverB change status to down, and command ‘rbd
create xxx’ return;

My question:
1.       Why rbd create will block about 18minutes? Is this because
the status of osds on serverB(the shutdown one) is not modified to
down? What is the time mechanism about this?

2.       When write objects, if primary osd think other osd is up, it
will always wait until other osd reply, it doesn’t have timeout
mechanism, isn’t it?

3.       The same environment , if I shutdown serverC(secondary
monitor) , ‘ceph osd tree’ show four osds down and another one osd is
up;

if I shutdown serverD,the result is five osds are all down or all up,
when all osd is up,the result is the same as shutdown server B;

shutdown primary monitor / secondary monitor / tertiary monitor, ceph
status is not the same,I’m very confused about this.Can someone help
me?

- 
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