99 lines
3.1 KiB
Erlang
99 lines
3.1 KiB
Erlang
%% -*- erlang -*-
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%%%% leveled
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%% @doc A path under which leveled data files will be stored.
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{mapping, "leveled.data_root", "leveled.data_root", [
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{default, "$(platform_data_dir)/leveled"},
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{datatype, directory}
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]}.
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%% @doc Strategy for flushing data to disk
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%% Can be set to riak_sync, sync (if OTP > 16) or none. Use none, and the OS
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%% will flush when most efficient. Use riak_sync or sync to flush after every
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%% PUT (not recommended wihtout some hardware support e.g. flash drives and/or
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%% Flash-backed Write Caches)
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{mapping, "leveled.sync_strategy", "leveled.sync_strategy", [
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{default, none},
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{datatype, atom}
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]}.
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%% @doc The key size of the Bookie's in-memory cache
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{mapping, "leveled.cache_size", "leveled.cache_size", [
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{default, 4000},
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{datatype, integer},
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hidden
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]}.
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%% @doc The key size of the Penciller's in-memory cache
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{mapping, "leveled.penciller_cache_size", "leveled.penciller_cache_size", [
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{default, 28000},
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{datatype, integer},
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hidden
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]}.
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%% @doc Compression method
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%% Can be lz4 or native (which will use the Erlang native zlib compression)
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%% within term_to_binary
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{mapping, "leveled.compression_method", "leveled.compression_method", [
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{default, lz4},
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{datatype, atom}
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]}.
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%% @doc Compression point
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%% The point at which compression is applied to the Journal (the Ledger is
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%% always compressed). Use on_receipt or on_compact. on_compact is suitable
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%% when values are unlikely to yield much benefit from compression
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%% (compression is only attempted when compacting)
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{mapping, "leveled.compression_point", "leveled.compression_point", [
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{default, on_receipt},
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{datatype, atom}
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]}.
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%% @doc The approximate size (in bytes) when a Journal file should be rolled.
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%% Normally keep this as around the size of o(100K) objects. Default is 500MB
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{mapping, "leveled.journal_size", "leveled.journal_size", [
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{default, 500000000},
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{datatype, integer}
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]}.
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%% @doc The number of journal compactions per vnode per day
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%% The higher the value, the more compaction runs, and the sooner space is
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%% recovered. But each run has a cost
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{mapping, "leveled.compaction_runs_perday", "leveled.compaction_runs_perday", [
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{default, 16},
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{datatype, integer}
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]}.
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%% @doc Compaction Low Hour
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%% The hour of the day in which journal compaction can start. Use Low hour
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%% of 0 and High hour of 23 to have no compaction window (i.e. always compact
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%% regardless of time of day)
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{mapping, "leveled.compaction_low_hour", "leveled.compaction_low_hour", [
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{default, 0},
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{datatype, integer}
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]}.
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%% @doc Compaction Top Hour
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%% The hour of the day, after which journal compaction should stop.
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%% If low hour > top hour then, compaction will work overnight between low
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%% hour and top hour (inclusive). Timings rely on server's view of local time
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{mapping, "leveled.compaction_top_hour", "leveled.compaction_top_hour", [
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{default, 23},
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{datatype, integer}
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]}.
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%% @doc Max Journal Files Per Compaction Run
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%% In a single compaction run, what is the maximum number of consecutive files
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%% which may be compacted.
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{mapping, "leveled.max_run_length", "leveled.max_run_length", [
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{default, 8},
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{datatype, integer},
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hidden
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]}.
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