func (b *Buy) Populate(s *ddtxn.Store, ex *ddtxn.ETransaction) {
for i := 0; i < b.nbidders; i++ {
k := ddtxn.ProductKey(i)
s.CreateKey(k, int32(0), ddtxn.SUM)
}
dlog.Printf("Created %v products; np: %v\n", b.nbidders, b.nproducts)
for i := 0; i < b.nbidders; i++ {
k := ddtxn.UserKey(uint64(i))
s.CreateKey(k, "x", ddtxn.WRITE)
}
dlog.Printf("Created %v bidders\n", b.nbidders)
dlog.Printf("Done with Populate")
}
// Calls rand 4 times
func (b *Buy) MakeOne(w int, local_seed *uint32, sp uint32, txn *ddtxn.Query) {
var bidder int
var product int
if *partition {
rnd := ddtxn.RandN(local_seed, sp/8)
lb := int(rnd)
bidder = lb + w*int(sp)
} else {
bidder = int(ddtxn.RandN(local_seed, uint32(b.nbidders)))
}
x := int(ddtxn.RandN(local_seed, 100))
if b.zipfd > 0 {
product = int(b.z[w].Uint64())
} else {
product = int(ddtxn.RandN(local_seed, uint32(b.nproducts)))
}
if x < b.read_rate {
if x > b.ncontended_rate {
// Contended read; use Zipfian distribution or np
txn.K1 = ddtxn.UserKey(uint64(bidder))
txn.K2 = ddtxn.ProductKey(product)
} else {
// (Hopefully) uncontended read. Random product.
product = int(ddtxn.RandN(local_seed, uint32(b.nbidders)))
txn.K1 = ddtxn.UserKey(uint64(bidder))
txn.K2 = ddtxn.ProductKey(product)
}
txn.TXN = ddtxn.D_READ_TWO
} else {
amt := int32(ddtxn.RandN(local_seed, 10))
txn.K1 = ddtxn.UserKey(uint64(bidder))
txn.K2 = ddtxn.ProductKey(product)
txn.A = amt
txn.TXN = ddtxn.D_BUY
}
}