Hi Konstantin!
Quoting Konstantin Shalygin (k0...@k0ste.ru):
> >Is there any recommandation of how many osds a single flash device can
> >serve? The optane ones can do 2000MB/s write + 500.000 iop/s.
>
> Any sizes of db, except 3/30/300 is useless.
I have this from Mattia Belluco in my notes wh
i'm plannung to split the block db to a seperate flash device which i
also would like to use as an OSD for erasure coding metadata for rbd
devices.
If i want to use 14x 14TB HDDs per Node
https://docs.ceph.com/docs/master/rados/configuration/bluestore-config-ref/#sizing
recommends a minimum size
One tricky thing is each layer of RocksDB is 100% on SSD or 100% on HDD,
so either you need to tweak the rocksdb configuration , or there will be a
huge waste, e.g 20GB DB partition makes no difference compared to a 3GB
one (under default rocksdb configuration)
Janne Johansson 于2020年1月14日周二 下午4
(sorry for empty mail just before)
> i'm plannung to split the block db to a seperate flash device which i
>> also would like to use as an OSD for erasure coding metadata for rbd
>> devices.
>>
>> If i want to use 14x 14TB HDDs per Node
>>
>> https://docs.ceph.com/docs/master/rados/configuration/
Den mån 13 jan. 2020 kl 08:09 skrev Stefan Priebe - Profihost AG <
s.pri...@profihost.ag>:
> Hello,
>
> i'm plannung to split the block db to a seperate flash device which i
> also would like to use as an OSD for erasure coding metadata for rbd
> devices.
>
> If i want to use 14x 14TB HDDs per Nod
Hello,
does anybody have real live experience with externel block db?
Greets,
Stefan
Am 13.01.20 um 08:09 schrieb Stefan Priebe - Profihost AG:
> Hello,
>
> i'm plannung to split the block db to a seperate flash device which i
> also would like to use as an OSD for erasure coding metadata for rb
