I believe they were chosen based on a 3rd party recommendation. I would
suggest carefully considering each of those options and what they do
before blindly using them.
Mark
On 7/8/20 3:30 PM, Frank Ritchie wrote:
Hi,
For this post:
https://ceph.io/community/bluestore-default-vs-tuned-performance-comparison/
I don't see a way to contact the authors so I thought I would try here.
Does anyone know how the rocksdb tuning parameters of:
"
bluestore_rocksdb_options =
compression=kNoCompression,max_write_buffer_number=32,min_write_buffer_number_to_merge=2,recycle_log_file_num=32,compaction_style=kCompactionStyleLevel,write_buffer_size=67108864,target_file_size_base=67108864,max_background_compactions=31,level0_file_num_compaction_trigger=8,level0_slowdown_writes_trigger=32,level0_stop_writes_trigger=64,max_bytes_for_level_base=536870912,compaction_threads=32,max_bytes_for_level_multiplier=8,flusher_threads=8,compaction_readahead_size=2MB
"
were chosen?
Some of the settings seem to not be in line with the rocksdb tuning guide:
https://github.com/facebook/rocksdb/wiki/RocksDB-Tuning-Guide
thx
Frank
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