Hi All,
I am testing running ceph luminous(12.2.1-249-g42172a4
(42172a443183ffe6b36e85770e53fe678db293bf) on ARM server.
The ARM server has a two cores@1.4GHz cpu and 2GB ram and I am running 2 osd
per ARM server with 2x8TB(or 2x10TB) hdd.
Now I am facing constantly oom problem.I have tried upgrade ceph(to fix osd
memroy leak problem) and lower the bluestore cache setting.The oom problems
did get better but still occurs constantly.
I am hoping someone can gives me some advice of the follow questions.
Is it impossible to run ceph in this config of hardware or Is it possible I can
do some tunning the solve this problem(even to lose some performance to avoid
the oom problem)?
Is it a good idea to use raid0 to combine the 2 HDD into one so I can only run
one osd to save some memory?
How is memory usage of osd related to the size of HDD?
PS:my ceph.conf bluestore cache setting
[osd]
bluestore_cache_size = 104857600
bluestore_cache_kv_max = 67108864
osd client message size cap = 67108864
2017-12-10
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