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RocksDB puts L2 files to block.db only if it’s at least 2560+256+1024 Mb (almost 4 GB). And it will put L3 there only if it’s at least 25600+2560+256+1024 Mb (almost 30 GB). And L4 - only if it’s at least 256000+25600+2560+256+1024 Mb (roughly 286 GB).
In other words, all block.db sizes except 4, 30, 286 GB are pointless, Bluestore won’t use everything above the previous «round» size. At least if you don't change RocksDB settings. 286 GB And of these 4 is a lottoo small, Bluestore rarely needs that much286 is too big.
== RAID WRITE HOLE ==
