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enhance smoosh to cleanup search indexes when ddocs change #4718

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enhance smoosh to cleanup search indexes when ddocs change #4718

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25 changes: 1 addition & 24 deletions src/dreyfus/src/dreyfus_fabric_cleanup.erl
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Original file line number Diff line number Diff line change
Expand Up @@ -14,40 +14,17 @@

-module(dreyfus_fabric_cleanup).

-include("dreyfus.hrl").
-include_lib("mem3/include/mem3.hrl").
-include_lib("couch/include/couch_db.hrl").

-export([go/1]).

go(DbName) ->
{ok, DesignDocs} = fabric:design_docs(DbName),
ActiveSigs = lists:usort(
lists:flatmap(
fun active_sigs/1,
[couch_doc:from_json_obj(DD) || DD <- DesignDocs]
)
),
ActiveSigs = dreyfus_util:active_sigs(DbName),
cleanup_local_purge_doc(DbName, ActiveSigs),
clouseau_rpc:cleanup(DbName, ActiveSigs),
ok.

active_sigs(#doc{body = {Fields}} = Doc) ->
try
{RawIndexes} = couch_util:get_value(<<"indexes">>, Fields, {[]}),
{IndexNames, _} = lists:unzip(RawIndexes),
[
begin
{ok, Index} = dreyfus_index:design_doc_to_index(Doc, IndexName),
Index#index.sig
end
|| IndexName <- IndexNames
]
catch
error:{badmatch, _Error} ->
[]
end.

cleanup_local_purge_doc(DbName, ActiveSigs) ->
{ok, BaseDir} = clouseau_rpc:get_root_dir(),
DbNamePattern = <<DbName/binary, ".*">>,
Expand Down
30 changes: 29 additions & 1 deletion src/dreyfus/src/dreyfus_util.erl
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Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,8 @@
maybe_create_local_purge_doc/2,
maybe_create_local_purge_doc/3,
get_signature_from_idxdir/1,
verify_index_exists/2
verify_index_exists/2,
active_sigs/1
]).

get_shards(DbName, #index_query_args{partition = nil} = Args) ->
Expand Down Expand Up @@ -428,6 +429,33 @@ verify_index_exists(DbName, Props) ->
false
end.

active_sigs(DbName) when is_binary(DbName) ->
couch_util:with_db(DbName, fun active_sigs/1);
active_sigs(Db) ->
{ok, DesignDocs} = couch_db:get_design_docs(Db),
lists:usort(
lists:flatmap(
fun sigs_from_ddoc/1,
[couch_doc:from_json_obj(DD) || DD <- DesignDocs]
)
).

sigs_from_ddoc(#doc{body = {Fields}} = Doc) ->
try
{RawIndexes} = couch_util:get_value(<<"indexes">>, Fields, {[]}),
{IndexNames, _} = lists:unzip(RawIndexes),
[
begin
{ok, Index} = dreyfus_index:design_doc_to_index(Doc, IndexName),
Index#index.sig
end
|| IndexName <- IndexNames
]
catch
error:{badmatch, _Error} ->
[]
end.

-ifdef(TEST).
-include_lib("eunit/include/eunit.hrl").

Expand Down
27 changes: 20 additions & 7 deletions src/fabric/src/fabric.erl
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Expand Up @@ -590,25 +590,38 @@ cleanup_index_files(DbName) ->
cleanup_local_indices_and_purge_checkpoints([]) ->
ok;
cleanup_local_indices_and_purge_checkpoints([_ | _] = Dbs) ->
AllIndices = lists:map(fun couch_mrview_util:get_index_files/1, Dbs),
AllPurges = lists:map(fun couch_mrview_util:get_purge_checkpoints/1, Dbs),
Sigs = couch_mrview_util:get_signatures(hd(Dbs)),
ok = cleanup_purges(Sigs, AllPurges, Dbs),
ok = cleanup_indices(Sigs, AllIndices).
MrViewIndices = lists:map(fun couch_mrview_util:get_index_files/1, Dbs),
MrViewPurges = lists:map(fun couch_mrview_util:get_purge_checkpoints/1, Dbs),
MrViewSigs = couch_mrview_util:get_signatures(hd(Dbs)),
ok = cleanup_mrview_purges(MrViewSigs, MrViewPurges, Dbs),
ok = cleanup_mrview_indices(MrViewSigs, MrViewIndices),

cleanup_purges(Sigs, AllPurges, Dbs) ->
ClouseauSigs = dreyfus_util:active_sigs(hd(Dbs)),
ok = cleanup_clouseau_indices(Dbs, ClouseauSigs),

NouveauSigs = nouveau_util:active_sigs(hd(Dbs)),
ok = cleanup_nouveau_indices(Dbs, NouveauSigs).

cleanup_mrview_purges(Sigs, AllPurges, Dbs) ->
Fun = fun(DbPurges, Db) ->
couch_mrview_cleanup:cleanup_purges(Db, Sigs, DbPurges)
end,
lists:zipwith(Fun, AllPurges, Dbs),
ok.

cleanup_indices(Sigs, AllIndices) ->
cleanup_mrview_indices(Sigs, AllIndices) ->
Fun = fun(DbIndices) ->
couch_mrview_cleanup:cleanup_indices(Sigs, DbIndices)
end,
lists:foreach(Fun, AllIndices).

cleanup_clouseau_indices(Dbs, ActiveSigs) ->
Fun = fun(Db) -> clouseau_rpc:cleanup(Db, ActiveSigs) end,
lists:foreach(Fun, Dbs).
cleanup_nouveau_indices(Dbs, ActiveSigs) ->
Fun = fun(Db) -> nouveau_api:delete_path(nouveau_util:index_name(Db), ActiveSigs) end,
lists:foreach(Fun, Dbs).
Comment on lines +618 to +623
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These shouldn't crash if either of those are not enabled? If there is a chance we could wrap them in a try ... catch maybe?

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clouseau_rpc:cleanup is a gen_server:cast so that's fine even if the target node doesn't exist.

all the nouveau_api functions have a send_if_enabled check and return {error, nouveau_not_enabled} when it's not enabled.

in either case I ignore the function result, but perhaps I should check that it's one of the two expected results?

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Makes sense. The only worry was that we would throw an exception and prevent other indexes from getting cleaned up. Thanks for double-checking, I think it's fine as is, then.


%% @doc clean up index files for a specific db on all nodes
-spec cleanup_index_files_all_nodes(dbname()) -> [reference()].
cleanup_index_files_all_nodes(DbName) ->
Expand Down
9 changes: 1 addition & 8 deletions src/nouveau/src/nouveau_fabric_cleanup.erl
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Expand Up @@ -14,9 +14,6 @@

-module(nouveau_fabric_cleanup).

-include_lib("couch/include/couch_db.hrl").

-include("nouveau.hrl").
-include_lib("mem3/include/mem3.hrl").

-export([go/1]).
Expand All @@ -26,7 +23,7 @@ go(DbName) ->
ActiveSigs =
lists:usort(
lists:flatmap(
fun(Doc) -> active_sigs(DbName, Doc) end,
fun(Doc) -> nouveau_util:active_sigs(DbName, Doc) end,
[couch_doc:from_json_obj(DD) || DD <- DesignDocs]
)
),
Expand All @@ -37,7 +34,3 @@ go(DbName) ->
end,
Shards
).

active_sigs(DbName, #doc{} = Doc) ->
Indexes = nouveau_util:design_doc_to_indexes(DbName, Doc),
lists:map(fun(Index) -> Index#index.sig end, Indexes).
18 changes: 18 additions & 0 deletions src/nouveau/src/nouveau_util.erl
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Expand Up @@ -22,6 +22,8 @@
index_name/1,
design_doc_to_indexes/2,
design_doc_to_index/3,
active_sigs/1,
active_sigs/2,
verify_index_exists/2,
ensure_local_purge_docs/2,
maybe_create_local_purge_doc/2,
Expand Down Expand Up @@ -98,6 +100,22 @@ design_doc_to_index(DbName, #doc{id = Id, body = {Fields}}, IndexName) ->
{error, InvalidDDocError}
end.

active_sigs(DbName) when is_binary(DbName) ->
couch_util:with_db(DbName, fun active_sigs/1);
active_sigs(Db) ->
DbName = couch_db:name(Db),
{ok, DesignDocs} = couch_db:get_design_docs(Db),
lists:usort(
lists:flatmap(
fun(Doc) -> active_sigs(DbName, Doc) end,
[couch_doc:from_json_obj(DD) || DD <- DesignDocs]
)
).

active_sigs(DbName, #doc{} = Doc) ->
Indexes = design_doc_to_indexes(DbName, Doc),
lists:map(fun(Index) -> Index#index.sig end, Indexes).

verify_index_exists(DbName, Props) ->
try
Type = couch_util:get_value(<<"type">>, Props),
Expand Down
5 changes: 5 additions & 0 deletions src/smoosh/src/smoosh_server.erl
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Expand Up @@ -123,6 +123,9 @@ handle_db_event(DbName, local_updated, St) ->
handle_db_event(DbName, updated, St) ->
enqueue(DbName),
{ok, St};
handle_db_event(DbName, ddoc_updated, St) ->
enqueue({?INDEX_CLEANUP, mem3:dbname(DbName)}),
{ok, St};
handle_db_event(DbName, {index_commit, IdxName}, St) ->
enqueue({DbName, IdxName}),
{ok, St};
Expand Down Expand Up @@ -342,6 +345,8 @@ find_channel(#state{} = State, [Channel | Rest], Object) ->
find_channel(State, Rest, Object)
end.

stale_enough({?INDEX_CLEANUP, _}) ->
true;
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ddoc_updated events are rare, unlike database updates, so choosing not to action one would leave unreferenced indexes on disk for a long time, perhaps indefinitely.

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We're also triggering these during every shard compaction attempt, proportionally to the number of shards (so we'd roughly trigger once for each clustered db). That should be a low enough rate, it may be worth checking what it looks like a busy cluster.

stale_enough(Object) ->
LastUpdatedSec = last_updated(Object),
Staleness = erlang:monotonic_time(second) - LastUpdatedSec,
Expand Down