stasis-bLSM/test/check_datapage.cpp

#include <string>
#include <vector>
#include <iostream>
#include <sstream>
#include <logstore.h>
#include <datapage.h>

#include <assert.h>
#include <limits.h>
#include <math.h>
#include <pthread.h>
#include <sys/time.h>
#include <time.h>

#include "check_util.h"
#include "regionAllocator.h"

#include <stasis/transactional.h>
#undef begin
#undef end

template class DataPage<datatuple>;


void insertProbeIter(size_t NUM_ENTRIES)
{
    srand(1000);
    unlink("storefile.txt");
    unlink("logfile.txt");

    sync();

    diskTreeComponent::internalNodes::init_stasis();

    int xid = Tbegin();

    std::vector<std::string> data_arr;
    std::vector<std::string> key_arr;
    preprandstr(NUM_ENTRIES, data_arr, 5*4096, true);
    preprandstr(NUM_ENTRIES+200, key_arr, 50, true);//well i can handle upto 200
    
    std::sort(key_arr.begin(), key_arr.end(), &mycmp);

    removeduplicates(key_arr);
    if(key_arr.size() > NUM_ENTRIES)
        key_arr.erase(key_arr.begin()+NUM_ENTRIES, key_arr.end());
    
    NUM_ENTRIES=key_arr.size();
    
    if(data_arr.size() > NUM_ENTRIES)
        data_arr.erase(data_arr.begin()+NUM_ENTRIES, data_arr.end());

    RegionAllocator * alloc = new RegionAllocator(xid, 10000); // ~ 10 datapages per region.

    printf("Stage 1: Writing %d keys\n", NUM_ENTRIES);
      
    int pcount = 1000;
    int dpages = 0;
    DataPage<datatuple> *dp=0;
    int64_t datasize = 0;
    std::vector<pageid_t> dsp;
    for(size_t i = 0; i < NUM_ENTRIES; i++)
    {
        //prepare the key
        datatuple *newtuple = datatuple::create(key_arr[i].c_str(), key_arr[i].length()+1, data_arr[i].c_str(), data_arr[i].length()+1);

        datasize += newtuple->byte_length();
        if(dp==NULL || !dp->append(newtuple))
        {
            dpages++;
            if(dp)
                dp->writes_done();
                delete dp;

            dp = new DataPage<datatuple>(xid, pcount, alloc);

			bool succ = dp->append(newtuple);
			assert(succ);

            dsp.push_back(dp->get_start_pid());
        }
    }
    if(dp) {
      dp->writes_done();
      delete dp;
    }

    printf("Total data set length: %lld\n", (long long)datasize);
    printf("Storage utilization: %.2f\n", (datasize+.0) / (PAGE_SIZE * pcount * dpages));
    printf("Number of datapages: %d\n", dpages);
    printf("Writes complete.\n");
    
    Tcommit(xid);
    xid = Tbegin();


    printf("Stage 2: Reading %d tuples\n", NUM_ENTRIES);

    
    int tuplenum = 0;
    for(int i = 0; i < dpages ; i++)
    {
        DataPage<datatuple> dp(xid, 0, dsp[i]);
        DataPage<datatuple>::iterator itr = dp.begin();
        datatuple *dt=0;
        while( (dt=itr.getnext()) != NULL)
            {
                assert(dt->keylen() == key_arr[tuplenum].length()+1);
                assert(dt->datalen() == data_arr[tuplenum].length()+1);
                tuplenum++;
                datatuple::freetuple(dt);
                dt = 0;
            }

    }
    
    printf("Reads completed.\n");
  
	Tcommit(xid);

	diskTreeComponent::internalNodes::deinit_stasis();
}


/** @test
 */
int main()
{
    insertProbeIter(10000);

    
    
    return 0;
}