On 01/21/2015 01:48 AM, Blinick, Stephen L wrote:
Moved to 0.91 yesterday and ran into some issues, with a Memstore OSD of default size. After a few hundred K OPS client gets a FULL message and the avail space looks like:
[root@cephtestnode0 bmpa]# rados df
pool name KB objects clones degraded unfound rd rd KB wr wr KB
rbd 0 0 0 0 0 0 0 0 0
testmemstore 1505052 376263 0 0 0 0 0 376263 1505052
total used 1494247 376263
total avail 18014398508987737
total space 1000000
I was looking at pull request #2836 and found a case where there could be an unsigned int underflow in MemStore.cc:statfs:
st->f_bfree = st->f_bavail = MAX((st->f_blocks - used_bytes / st->f_bsize), 0);
But that wasn't the final issue.. I put some asserts where used_bytes could underflow as well and didn't catch anything. I will keep digging but wanted to find out if anyone else was seeing the issue as well.
FWIW, I hit this yesterday too. I hadn't started debugging it yet
though. Looks like you are farther along than I am, thanks Stephen! :)
Thanks,
Stephen
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