#include "xbt/log.h"
+#include "simgrid/s4u/Actor.hpp"
#include "simgrid/s4u/Host.hpp"
#include "simgrid/s4u/Storage.hpp"
#include "simgrid/simix.hpp"
sg_size_t File::read(sg_size_t size)
{
+ if (size_ == 0) /* Nothing to read, return */
+ return 0;
+
+ /* Find the host where the file is physically located and read it */
+ Host* host = localStorage->getHost();
XBT_DEBUG("READ %s on disk '%s'", getPath(), localStorage->getCname());
// if the current position is close to the end of the file, we may not be able to read the requested size
sg_size_t read_size = localStorage->read(std::min(size, size_ - current_position_));
current_position_ += read_size;
+
+ if (strcmp(host->getCname(), Host::current()->getCname())) {
+ /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
+ XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", host->getCname(), read_size);
+ Host* m_host_list[] = {Host::current(), host};
+ double* flops_amount = new double[2]{0, 0};
+ double* bytes_amount = new double[4]{0, 0, static_cast<double>(read_size), 0};
+
+ this_actor::parallel_execute(2, m_host_list, flops_amount, bytes_amount);
+ }
+
return read_size;
}
+/** \brief Write into a file (local or remote)
+ *
+ * \param size of the file to write
+ * \param fd is a the file descriptor
+ * \return the number of bytes successfully write or -1 if an error occurred
+ */
sg_size_t File::write(sg_size_t size)
{
+ if (size == 0) /* Nothing to write, return */
+ return 0;
+
+ /* Find the host where the file is physically located (remote or local)*/
+ Host* host = localStorage->getHost();
+
+ if (strcmp(host->getCname(), Host::current()->getCname())) {
+ /* the file is hosted on a remote host, initiate a communication between src and dest hosts for data transfer */
+ XBT_DEBUG("File is on %s remote host, initiate data transfer of %llu bytes.", host->getCname(), size);
+ Host* m_host_list[] = {Host::current(), host};
+ double* flops_amount = new double[2]{0, 0};
+ double* bytes_amount = new double[4]{0, static_cast<double>(size), 0, 0};
+
+ this_actor::parallel_execute(2, m_host_list, flops_amount, bytes_amount);
+ }
+
XBT_DEBUG("WRITE %s on disk '%s'. size '%llu/%llu'", getPath(), localStorage->getCname(), size, size_);
// If the storage is full before even starting to write
if (sg_storage_get_size_used(localStorage) >= sg_storage_get_size(localStorage))
}
}
+int File::remoteCopy(sg_host_t host, const char* fullpath)
+{
+ /* Find the host where the file is physically located and read it */
+ Storage* storage_src = localStorage;
+ Host* src_host = storage_src->getHost();
+ seek(0, SEEK_SET);
+ XBT_DEBUG("READ %s on disk '%s'", getPath(), localStorage->getCname());
+ // if the current position is close to the end of the file, we may not be able to read the requested size
+ sg_size_t read_size = localStorage->read(size_);
+ current_position_ += read_size;
+
+ /* Find the host that owns the storage where the file has to be copied */
+ Storage* storage_dest = nullptr;
+ Host* dst_host;
+ size_t longest_prefix_length = 0;
+
+ for (auto const& elm : host->getMountedStorages()) {
+ std::string mount_point = std::string(fullpath).substr(0, elm.first.size());
+ if (mount_point == elm.first && elm.first.length() > longest_prefix_length) {
+ /* The current mount name is found in the full path and is bigger than the previous*/
+ longest_prefix_length = elm.first.length();
+ storage_dest = elm.second;
+ }
+ }
+
+ if (storage_dest != nullptr) {
+ /* Mount point found, retrieve the host the storage is attached to */
+ dst_host = storage_dest->getHost();
+ } else {
+ XBT_WARN("Can't find mount point for '%s' on destination host '%s'", fullpath, host->getCname());
+ return -1;
+ }
+
+ XBT_DEBUG("Initiate data transfer of %llu bytes between %s and %s.", read_size, src_host->getCname(),
+ storage_dest->getHost()->getCname());
+ Host* m_host_list[] = {src_host, dst_host};
+ double* flops_amount = new double[2]{0, 0};
+ double* bytes_amount = new double[4]{0, static_cast<double>(read_size), 0, 0};
+
+ this_actor::parallel_execute(2, m_host_list, flops_amount, bytes_amount);
+
+ /* Create file on remote host, write it and close it */
+ File* fd = new File(fullpath, dst_host, nullptr);
+ sg_size_t write_size = fd->localStorage->write(read_size);
+ fd->localStorage->extension<FileSystemStorageExt>()->incrUsedSize(write_size);
+ (*(fd->localStorage->extension<FileSystemStorageExt>()->getContent()))[path_] = size_;
+ delete fd;
+ return 0;
+}
+
+int File::remoteMove(sg_host_t host, const char* fullpath)
+{
+ int res = remoteCopy(host, fullpath);
+ unlink();
+ return res;
+}
+
FileSystemStorageExt::FileSystemStorageExt(simgrid::s4u::Storage* ptr)
{
content_ = parseContent(ptr->getImpl()->content_name);
return new simgrid::s4u::File(fullpath, data);
}
+sg_size_t sg_file_read(sg_file_t fd, sg_size_t size)
+{
+ return fd->read(size);
+}
+
+sg_size_t sg_file_write(sg_file_t fd, sg_size_t size)
+{
+ return fd->write(size);
+}
+
void sg_file_close(sg_file_t fd)
{
delete fd;
delete fd;
}
+/**
+ * \brief Copy a file to another location on a remote host.
+ * \param file : the file to move
+ * \param host : the remote host where the file has to be copied
+ * \param fullpath : the complete path destination on the remote host
+ * \return If successful, the function returns 0. Otherwise, it returns -1.
+ */
+int sg_file_rcopy(sg_file_t file, sg_host_t host, const char* fullpath)
+{
+ return file->remoteCopy(host, fullpath);
+}
+
+/**
+ * \brief Move a file to another location on a remote host.
+ * \param file : the file to move
+ * \param host : the remote host where the file has to be moved
+ * \param fullpath : the complete path destination on the remote host
+ * \return If successful, the function returns 0. Otherwise, it returns -1.
+ */
+int sg_file_rmove(sg_file_t file, sg_host_t host, const char* fullpath)
+{
+ return file->remoteMove(host, fullpath);
+}
+
sg_size_t sg_storage_get_size_free(sg_storage_t st)
{
return st->extension<FileSystemStorageExt>()->getSize() - st->extension<FileSystemStorageExt>()->getUsedSize();
