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tools/cephfs: make cephfs-data-scan prints the max used ino

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Fixes: http://tracker.ceph.com/issues/26925
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
This commit is contained in:
Yan, Zheng 2018-08-13 09:56:04 +08:00
parent bfd0cde8ff
commit e943ff0b8f
2 changed files with 35 additions and 1 deletions
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8
doc/cephfs/disaster-recovery-experts.rst
View File

@ -183,6 +183,14 @@ The example below shows how to run 4 workers simultaneously:
It is **important** to ensure that all workers have completed the
scan_extents phase before any workers enter the scan_inodes phase.
Output of 'scan_links' command includes max used inode number for each
MDS rank. You may need to update InoTables of each MDS rank.
::
cephfs-table-tool recovery-fs:x show inode
cephfs-table-tool recovery-fs:x take_inos <max ino of mds.x)
After completing the metadata recovery, you may want to run cleanup
operation to delete ancillary data geneated during recovery.

28
src/tools/cephfs/DataScan.cc
View File

@ -903,7 +903,7 @@ int DataScan::scan_links()
return -EINVAL;
}
interval_set<inodeno_t> used_inos;
interval_set<uint64_t> used_inos;
map<inodeno_t, int> remote_links;
struct link_info_t {
@ -1035,6 +1035,28 @@ int DataScan::scan_links()
}
}
}
map<unsigned, uint64_t> max_ino_map;
{
auto prev_max_ino = (uint64_t)1 << 40;
for (auto p = used_inos.begin(); p != used_inos.end(); ++p) {
auto cur_max = p.get_start() + p.get_len() - 1;
if (cur_max < prev_max_ino)
continue; // system inodes
if ((prev_max_ino >> 40) != (cur_max >> 40)) {
unsigned rank = (prev_max_ino >> 40) - 1;
max_ino_map[rank] = prev_max_ino;
} else if ((p.get_start() >> 40) != (cur_max >> 40)) {
unsigned rank = (p.get_start() >> 40) - 1;
max_ino_map[rank] = ((uint64_t)(rank + 2) << 40) - 1;
}
prev_max_ino = cur_max;
}
unsigned rank = (prev_max_ino >> 40) - 1;
max_ino_map[rank] = prev_max_ino;
}
used_inos.clear();
for (auto& p : dup_primaries) {
@ -1109,6 +1131,10 @@ int DataScan::scan_links()
return r;
}
for (auto& p : max_ino_map) {
std::cout << "mds." << p.first << " max used ino " << p.second << std::endl;
}
return 0;
}