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added a knob which reverts the new queue behavior

This commit is contained in:
Evan Tschannen 2020-03-04 16:23:49 -08:00
parent 125bd13198
commit 6d6f184e2f
3 changed files with 5 additions and 0 deletions
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3
fdbserver/DataDistributionQueue.actor.cpp
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@ -306,6 +306,9 @@ bool canLaunch( RelocateData & relocation, int teamSize, int singleRegionTeamSiz
// find the "workFactor" for this, were it launched now
int workFactor = getWorkFactor( relocation, singleRegionTeamSize );
int neededServers = std::min<int>( relocation.src.size(), teamSize - singleRegionTeamSize + 1 );
if(SERVER_KNOBS->USE_OLD_NEEDED_SERVERS) {
neededServers = std::max( 1, (int)relocation.src.size() - teamSize + 1 );
}
// see if each of the SS can launch this task
for( int i = 0; i < relocation.src.size(); i++ ) {
// For each source server for this relocation, copy and modify its busyness to reflect work that WOULD be cancelled

1
fdbserver/Knobs.cpp
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@ -104,6 +104,7 @@ ServerKnobs::ServerKnobs(bool randomize, ClientKnobs* clientKnobs, bool isSimula
init( INFLIGHT_PENALTY_HEALTHY, 1.0 );
init( INFLIGHT_PENALTY_UNHEALTHY, 500.0 );
init( INFLIGHT_PENALTY_ONE_LEFT, 1000.0 );
init( USE_OLD_NEEDED_SERVERS, false );
init( PRIORITY_RECOVER_MOVE, 110 );
init( PRIORITY_REBALANCE_UNDERUTILIZED_TEAM, 120 );

1
fdbserver/Knobs.h
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@ -104,6 +104,7 @@ public:
double INFLIGHT_PENALTY_REDUNDANT;
double INFLIGHT_PENALTY_UNHEALTHY;
double INFLIGHT_PENALTY_ONE_LEFT;
bool USE_OLD_NEEDED_SERVERS;
// Higher priorities are executed first
// Priority/100 is the "priority group"/"superpriority". Priority inversion