void clear(size_t nvertices) {
int nblocks = (nvertices - 1) / verticesperblock + 1;
for(int i=0; i < nblocks; i++) {
std::string bfilename = blockfilename(i);
if (file_exists(bfilename)) {
remove(bfilename.c_str());
}
delete_block_uncompressed_sizefile(bfilename);
}
}
static void delete_shards(std::string base_filename, int nshards) {
#ifdef DYNAMICEDATA
typedef int EdgeDataType;
#else
typedef EdgeDataType_ EdgeDataType;
#endif
logstream(LOG_DEBUG) << "Deleting files for " << base_filename << " shards=" << nshards << std::endl;
std::string intervalfname = filename_intervals(base_filename, nshards);
if (file_exists(intervalfname)) {
int err = remove(intervalfname.c_str());
if (err != 0) logstream(LOG_ERROR) << "Error removing file " << intervalfname
<< ", " << strerror(errno) << std::endl;
}
/* Note: degree file is not removed, because same graph with different number
of shards share the file. This should be probably change.
std::string degreefname = filename_degree_data(base_filename);
if (file_exists(degreefname)) {
remove(degreefname.c_str());
} */
size_t blocksize = 4096 * 1024;
while (blocksize % sizeof(EdgeDataType) != 0) blocksize++;
for(int p=0; p < nshards; p++) {
int blockid = 0;
std::string filename_edata = filename_shard_edata<EdgeDataType>(base_filename, p, nshards);
std::string fsizename = filename_edata + ".size";
if (file_exists(fsizename)) {
int err = remove(fsizename.c_str());
if (err != 0) logstream(LOG_ERROR) << "Error removing file " << fsizename
<< ", " << strerror(errno) << std::endl;
}
while(true) {
std::string block_filename = filename_shard_edata_block(filename_edata, blockid, blocksize);
if (file_exists(block_filename)) {
int err = remove(block_filename.c_str());
if (err != 0) logstream(LOG_ERROR) << "Error removing file " << block_filename
<< ", " << strerror(errno) << std::endl;
} else {
break;
}
#ifdef DYNAMICEDATA
delete_block_uncompressed_sizefile(block_filename);
#endif
blockid++;
}
std::string dirname = dirname_shard_edata_block(filename_edata, blocksize);
if (file_exists(dirname)) {
int err = remove(dirname.c_str());
if (err != 0) logstream(LOG_ERROR) << "Error removing directory " << dirname
<< ", " << strerror(errno) << std::endl;
}
std::string adjname = filename_shard_adj(base_filename, p, nshards);
logstream(LOG_DEBUG) << "Deleting " << adjname << " exists: " << file_exists(adjname) << std::endl;
if (file_exists(adjname)) {
int err = remove(adjname.c_str());
if (err != 0) logstream(LOG_ERROR) << "Error removing file " << adjname
<< ", " << strerror(errno) << std::endl;
}
}
std::string numv_filename = base_filename + ".numvertices";
if (file_exists(numv_filename)) {
int err = remove(numv_filename.c_str());
if (err != 0) logstream(LOG_ERROR) << "Error removing file " << numv_filename
<< ", " << strerror(errno) << std::endl;
}
/* Degree file */
std::string deg_filename = filename_degree_data(base_filename);
if (file_exists(deg_filename)) {
int err = remove(deg_filename.c_str());
if (err != 0) logstream(LOG_ERROR) << "Error removing file " << deg_filename
<< ", " << strerror(errno) << std::endl;
}
}
