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control tag encoding of keyServersValue using a knob

This commit is contained in:
Evan Tschannen 2020-05-13 13:29:13 -07:00
parent 4a7d91f645
commit 1e0c10e9e8
3 changed files with 8 additions and 1 deletions
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5
fdbclient/SystemData.cpp
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@ -46,6 +46,11 @@ const KeyRef keyServersKey( const KeyRef& k, Arena& arena ) {
return k.withPrefix( keyServersPrefix, arena );
}
const Value keyServersValue( Standalone<RangeResultRef> result, const std::vector<UID>& src, const std::vector<UID>& dest ) {
if(!SERVER_KNOBS->TAG_ENCODE_KEY_SERVERS) {
BinaryWriter wr(IncludeVersion()); wr << src << dest;
return wr.toValue();
}
std::vector<Tag> srcTag;
std::vector<Tag> destTag;

1
fdbserver/Knobs.cpp
View File

@ -232,6 +232,7 @@ void ServerKnobs::initialize(bool randomize, ClientKnobs* clientKnobs, bool isSi
init( DD_SS_FAILURE_VERSIONLAG, 250000000 );
init( DD_SS_ALLOWED_VERSIONLAG, 200000000 ); if( randomize && BUGGIFY ) { DD_SS_FAILURE_VERSIONLAG = deterministicRandom()->randomInt(15000000, 500000000); DD_SS_ALLOWED_VERSIONLAG = 0.75 * DD_SS_FAILURE_VERSIONLAG; }
init( DD_SS_STUCK_TIME_LIMIT, 300.0 ); if( randomize && BUGGIFY ) { DD_SS_STUCK_TIME_LIMIT = 200.0 + deterministicRandom()->random01() * 100.0; }
init( TAG_ENCODE_KEY_SERVERS, false ); if( randomize && BUGGIFY ) TAG_ENCODE_KEY_SERVERS = true;
// TeamRemover
init( TR_FLAG_DISABLE_MACHINE_TEAM_REMOVER, false ); if( randomize && BUGGIFY ) TR_FLAG_DISABLE_MACHINE_TEAM_REMOVER = deterministicRandom()->random01() < 0.1 ? true : false; // false by default. disable the consistency check when it's true

3
fdbserver/Knobs.h
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@ -179,7 +179,8 @@ public:
int64_t DD_SS_FAILURE_VERSIONLAG; // Allowed SS version lag from the current read version before marking it as failed.
int64_t DD_SS_ALLOWED_VERSIONLAG; // SS will be marked as healthy if it's version lag goes below this value.
double DD_SS_STUCK_TIME_LIMIT; // If a storage server is not getting new versions for this amount of time, then it becomes undesired.
bool TAG_ENCODE_KEY_SERVERS;
// TeamRemover to remove redundant teams
bool TR_FLAG_DISABLE_MACHINE_TEAM_REMOVER; // disable the machineTeamRemover actor
double TR_REMOVE_MACHINE_TEAM_DELAY; // wait for the specified time before try to remove next machine team