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ceph version：0.94.2 ceph.conf: [global] I don't have any special configuration
Thanks 发件人: Robert LeBlanc [mailto:robert@xxxxxxxxxxxxx]
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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,
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Robert LeBlanc
PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1
On Thu, Aug 27, 2015 at 12:23 AM, zhao.mingyue@xxxxxxx 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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