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Schema clarifications

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This commit is contained in:
Martin Sumner 2020-12-09 09:18:38 +00:00
parent 186e3868a9
commit 182395ee00
2 changed files with 26 additions and 12 deletions
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22
priv/leveled_multi.schema
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@ -12,7 +12,7 @@
%% @doc Strategy for flushing data to disk
%% Can be set to riak_sync, sync (if OTP > 16) or none. Use none, and the OS
%% will flush when most efficient. Use riak_sync or sync to flush after every
%% PUT (not recommended wihtout some hardware support e.g. flash drives and/or
%% PUT (not recommended without some hardware support e.g. flash drives and/or
%% Flash-backed Write Caches)
{mapping, "multi_backend.$name.leveled.sync_strategy", "riak_kv.multi_backend", [
{default, none},
@ -91,11 +91,19 @@
%% The higher the value, the more compaction runs, and the sooner space is
%% recovered. But each run has a cost
{mapping, "multi_backend.$name.leveled.compaction_runs_perday", "riak_kv.multi_backend", [
{default, 16},
{default, 24},
{datatype, integer},
hidden
]}.
%% @doc The number of times per day to score an individual file for compaction
%% The default value will lead to each file, on average, being scored once
%% every 8 hours
{mapping, "multi_backend.$name.leveled.compaction_scores_perday", "riak_kv.multi_backend", [
{default, 3},
{datatype, integer}
]}.
%% @doc Compaction Low Hour
%% The hour of the day in which journal compaction can start. Use Low hour
%% of 0 and High hour of 23 to have no compaction window (i.e. always compact
@ -118,9 +126,11 @@
%% @doc Max Journal Files Per Compaction Run
%% In a single compaction run, what is the maximum number of consecutive files
%% which may be compacted.
%% which may be compacted. If increasing this value, the average number of
%% files per run may decrease, unless adjustments are also made to the
%% maxrunlength and singlefile compactionpercentage settings.
{mapping, "multi_backend.$name.leveled.max_run_length", "riak_kv.multi_backend", [
{default, 6},
{default, 4},
{datatype, integer},
hidden
]}.
@ -139,10 +149,10 @@
%% @doc Target Percentage for Single File
%% What is the target score for a run of a single file, to qualify for
%% compaction. If less than this percentage would be retained after compaction
%% then it is a candidate (e.g. in default case if 50% of space would be
%% then it is a candidate (e.g. in default case if 25% of space would be
%% recovered)
{mapping, "multi_backend.$name.leveled.singlefile_compactionpercentage", "riak_kv.multi_backend", [
{default, 50.0},
{default, 25.0},
{datatype, float},
hidden
]}.