Hi, Cephers.
Our ceph version is Hammer(0.94.7).
I implemented ceph with OpenStack, all instances use block storage as a local volume.
After increasing the PG number from 256 to 768, many vms are shutdown.
That was very strange case for me.
Below vm's is libvirt error log.
osd/osd_types.cc: In function 'bool pg_t::is_split(unsigned int, unsigned int, std::set<pg_t>*) const' thread 7fc4c01b9700 time 2016-06-28 14:17:35.004480
osd/osd_types.cc: 459: FAILED assert(m_seed < old_pg_num)
ceph version 0.94.1 (e4bfad3a3c51054df7e537a724c8d0bf9be972ff)
1: (()+0x15374b) [0x7fc4d1ca674b]
2: (()+0x222f01) [0x7fc4d1d75f01]
3: (()+0x222fdd) [0x7fc4d1d75fdd]
4: (()+0xc5339) [0x7fc4d1c18339]
5: (()+0xdc3e5) [0x7fc4d1c2f3e5]
6: (()+0xdcc4a) [0x7fc4d1c2fc4a]
7: (()+0xde1b2) [0x7fc4d1c311b2]
8: (()+0xe3fbf) [0x7fc4d1c36fbf]
9: (()+0x2c3b99) [0x7fc4d1e16b99]
10: (()+0x2f160d) [0x7fc4d1e4460d]
11: (()+0x80a5) [0x7fc4cd7aa0a5]
12: (clone()+0x6d) [0x7fc4cd4d7cfd]
NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.
terminate called after throwing an instance of 'ceph::FailedAssertion'
2016-06-28 05:17:36.557+0000: shutting down
Could you anybody explain this?
Thank you.
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