-/* LBS: An LFS-inspired filesystem backup system
- * Copyright (C) 2007 Michael Vrable
+/* Cumulus: Smart Filesystem Backup to Dumb Servers
*
- * Backup data is stored in a collection of objects, which are grouped together
+ * Copyright (C) 2008 The Regents of the University of California
+ * Written by Michael Vrable <mvrable@cs.ucsd.edu>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/* Backup data is stored in a collection of objects, which are grouped together
* into segments for storage purposes. This implementation of the object store
* represents segments as TAR files and objects as files within them. */
#include <assert.h>
#include <errno.h>
#include <stdio.h>
+#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/resource.h>
using std::max;
using std::list;
using std::map;
+using std::pair;
using std::set;
using std::string;
fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
}
-Tarfile::Tarfile(const string &path, const string &segment)
+Tarfile::Tarfile(RemoteFile *file, const string &segment)
: size(0),
segment_name(segment)
{
assert(sizeof(struct tar_header) == TAR_BLOCK_SIZE);
- real_fd = open(path.c_str(), O_WRONLY | O_CREAT, 0666);
- if (real_fd < 0)
- throw IOException("Error opening output file");
-
+ this->file = file;
+ real_fd = file->get_fd();
filter_fd = spawn_filter(real_fd, filter_program, &filter_pid);
}
static const size_t SEGMENT_SIZE = 4 * 1024 * 1024;
-static map<string, int64_t> group_sizes;
+/* Backup size summary: segment type -> (uncompressed size, compressed size) */
+static map<string, pair<int64_t, int64_t> > group_sizes;
ObjectReference TarSegmentStore::write_object(const char *data, size_t len,
const std::string &group)
segment = new segment_info;
segment->name = generate_uuid();
+ segment->group = group;
segment->basename = segment->name + ".tar";
segment->basename += filter_extension;
- segment->fullname = path + "/" + segment->basename;
- segment->file = new Tarfile(segment->fullname, segment->name);
segment->count = 0;
segment->size = 0;
+ segment->rf = remote->alloc_file(segment->basename, "segments");
+ segment->file = new Tarfile(segment->rf, segment->name);
segments[group] = segment;
} else {
segment->count++;
segment->size += len;
- group_sizes[group] += len;
+ group_sizes[group].first += len;
ObjectReference ref(segment->name, id_buf);
void TarSegmentStore::dump_stats()
{
printf("Data written:\n");
- for (map<string, int64_t>::iterator i = group_sizes.begin();
+ for (map<string, pair<int64_t, int64_t> >::iterator i = group_sizes.begin();
i != group_sizes.end(); ++i) {
- printf(" %s: %lld\n", i->first.c_str(), i->second);
+ printf(" %s: %lld (%lld compressed)\n", i->first.c_str(),
+ i->second.first, i->second.second);
}
}
if (db != NULL) {
SHA1Checksum segment_checksum;
- if (segment_checksum.process_file(segment->fullname.c_str())) {
+ if (segment_checksum.process_file(segment->rf->get_local_path().c_str())) {
string checksum = segment_checksum.checksum_str();
db->SetSegmentChecksum(segment->name, segment->basename, checksum,
segment->size);
}
+
+ struct stat stat_buf;
+ if (stat(segment->rf->get_local_path().c_str(), &stat_buf) == 0) {
+ group_sizes[segment->group].second += stat_buf.st_size;
+ }
}
+ segment->rf->send();
+
segments.erase(segments.find(group));
delete segment;
}