Ceph

06/11/2020

07:54 AM bluestore Bug #38745: spillover that doesn't make sense

Hi Seena,
"How did you find out that db is now on level 4? I mean what's the size limit on level one?"
These ar... Marcin W

06/10/2020

11:07 AM bluestore Bug #38745: spillover that doesn't make sense

Hi Seena,
Metadata is stored in RocksDB which a 'logging database'. It doesn't replace or remove entries, it just ... Marcin W

03/26/2020

08:53 AM bluestore Bug #38745: spillover that doesn't make sense

Hi Igor,
So, your recommendation is to create a volume which can serve enough space for levels 1-3, compaction and... Marcin W

03/24/2020

11:56 AM bluestore Bug #38745: spillover that doesn't make sense

BTW. These are the default RocksDB params IIRC (in GB):
base=256, multiplier=10, levels=5
0= 0.25
1= 0,25
2= 2,... Marcin W

11:47 AM bluestore Bug #38745: spillover that doesn't make sense

@Igor,
I've read somewhere in docs that recommended DB size is no less that 5% of block. IMO if we consider either... Marcin W

12/13/2019

02:07 PM bluestore Bug #42223: ceph-14.2.4/src/os/bluestore/fastbmap_allocator_impl.h: 750: FAILED ceph_assert(available >= allocated)

Due to this bug, a had to mitigate it with setting RocksDB param min_write_buffer_number_to_merge to 2. Since 14.2.5 ... Marcin W

11/13/2019

08:27 PM bluestore Bug #42223: ceph-14.2.4/src/os/bluestore/fastbmap_allocator_impl.h: 750: FAILED ceph_assert(available >= allocated)

@Igor,
Well done!
Would it also explain problem I had with 003808.sst(30MB) where all others were 16MB as they w... Marcin W

11/10/2019

12:02 PM bluestore Bug #42223: ceph-14.2.4/src/os/bluestore/fastbmap_allocator_impl.h: 750: FAILED ceph_assert(available >= allocated)

Dev guys,
I haven't checked the source code for handling KV store but is it possible that some parts use buffered ... Marcin W

11/02/2019

04:57 PM bluestore Bug #42223: ceph-14.2.4/src/os/bluestore/fastbmap_allocator_impl.h: 750: FAILED ceph_assert(available >= allocated)

I ran bluefs-export export twice on the same OSD and data MD5 hashes are identical for both copies. Marcin W

04:31 PM bluestore Bug #42223: ceph-14.2.4/src/os/bluestore/fastbmap_allocator_impl.h: 750: FAILED ceph_assert(available >= allocated)

Same here. Although, I have another OSD with same issues. Marcin W