Merge pull request #4 from dbrumbaugh/master

Updates for VLDB revision

1 files changed, 144 insertions, 0 deletions

diff --git a/benchmarks/vldb/alex_bench.cpp b/benchmarks/vldb/alex_bench.cpp
new file mode 100644
index 0000000..ba687f3
--- /dev/null
+++ b/benchmarks/vldb/alex_bench.cpp
@@ -0,0 +1,144 @@
+#define ENABLE_TIMER
+
+#include "alex.h"
+
+#include "file_util.h"
+#include "psu-util/progress.h"
+#include "psu-util/timer.h"
+
+typedef uint64_t key_type;
+typedef uint64_t value_type;
+
+typedef alex::Alex<key_type, value_type> Alex;
+
+struct record {
+    key_type key;
+    value_type value;
+};
+
+struct query {
+    key_type lower_bound;
+    key_type upper_bound;
+};
+
+void usage(char *progname) {
+    fprintf(stderr, "%s reccnt datafile queryfile\n", progname);
+}
+
+static size_t g_deleted_records = 0;
+static double delete_proportion = 0.05;
+
+static void insert_records(Alex *structure, size_t start, size_t stop, 
+                           std::vector<record> &records, std::vector<size_t> &to_delete, 
+                           size_t &delete_idx, bool delete_records, gsl_rng *rng) {
+
+    psudb::progress_update(0, "Insert Progress");
+    size_t reccnt = 0;
+    for (size_t i=start; i<stop; i++) {
+        structure->insert(records[i].key, records[i].value);
+
+        if (delete_records && gsl_rng_uniform(rng) <= 
+            delete_proportion && to_delete[delete_idx] <= i) {
+
+            structure->erase_one(records[i].key);
+            delete_idx++;
+            g_deleted_records++;
+        }
+    }
+
+    psudb::progress_update(1, "Insert Progress");
+}
+
+size_t g_global_cnt = 0;
+
+static void run_queries(Alex *alex, std::vector<query> &queries) {
+    for (size_t i=0; i<queries.size(); i++) {
+        size_t cnt=0; 
+        auto ptr = alex->find(queries[i].lower_bound);
+        while (ptr != alex->end() && ptr.key() <= queries[i].upper_bound) {
+            cnt++;
+            ptr++;
+        }
+
+        g_global_cnt += cnt;
+    }
+}
+
+Alex *warmup_alex(std::vector<record> records, size_t cnt) {
+    if (cnt >= records.size()) {
+        fprintf(stderr, "[E] Requesting warmup with more records than are available.\n");
+        exit(EXIT_FAILURE);
+    }
+
+    auto alex = new Alex();
+    std::pair<key_type, value_type> *insert_vec = new std::pair<key_type, value_type>[cnt];
+
+    for (size_t i=0; i<cnt; i++) {
+        insert_vec[i] = {records[i].key, records[i].value};
+    }
+
+    std::sort(insert_vec, insert_vec + cnt);
+    alex->bulk_load(insert_vec, cnt);
+    delete[] insert_vec;
+
+    return alex;
+}
+
+int main(int argc, char **argv)
+{
+    if (argc < 4) {
+        usage(argv[0]);
+        exit(EXIT_FAILURE);
+    }
+
+    size_t n = atol(argv[1]);
+    std::string d_fname = std::string(argv[2]);
+    std::string q_fname = std::string(argv[3]);
+
+    gsl_rng *rng = gsl_rng_alloc(gsl_rng_mt19937);
+
+
+    auto data = read_sosd_file<record>(d_fname, n);
+    std::vector<size_t> to_delete(n * delete_proportion);
+    size_t j=0;
+    for (size_t i=0; i<data.size() && j<to_delete.size(); i++) {
+        if (gsl_rng_uniform(rng) <= delete_proportion) {
+            to_delete[j++] = i;
+        } 
+    }
+
+    auto queries = read_range_queries<query>(q_fname, .0001);
+
+
+    size_t warmup = .1 * n;
+    size_t delete_idx = 0;
+
+    auto alex = warmup_alex(data, warmup);
+
+    TIMER_INIT();
+
+    TIMER_START();
+    insert_records(alex, warmup, data.size(), data, to_delete, delete_idx, true, rng);
+    TIMER_STOP();
+
+    auto insert_latency = TIMER_RESULT();
+    size_t insert_throughput = (size_t) ((double) (n - warmup) / (double) insert_latency * 1e9);
+
+    TIMER_START();
+    run_queries(alex, queries);
+    TIMER_STOP();
+
+    auto query_latency = TIMER_RESULT() / queries.size();
+
+    auto ext_size = alex->model_size() + alex->data_size() - (alex->size() * sizeof(record));
+
+    fprintf(stdout, "%ld\t%ld\t%lld\t%ld\n", insert_throughput, query_latency, ext_size, g_global_cnt);
+    fflush(stdout);
+
+    gsl_rng_free(rng);
+    fflush(stderr);
+
+    delete alex;
+
+    exit(EXIT_SUCCESS);
+}