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Merge pull request #8482 from majianpeng/bluestore-prefallocate

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os/bluestore/BlueStore: preallocate space when use file instead of blockdevice

Reviewed-by: Sage Weil <sage@redhat.com>
This commit is contained in:
Sage Weil 2016-05-11 10:52:42 -04:00
commit 5168d912bf
2 changed files with 29 additions and 0 deletions
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1
src/common/config_opts.h
View File

@ -940,6 +940,7 @@ OPTION(bluestore_block_db_create, OPT_BOOL, false)
OPTION(bluestore_block_wal_path, OPT_STR, "")
OPTION(bluestore_block_wal_size, OPT_U64, 96 * 1024*1024) // rocksdb wal
OPTION(bluestore_block_wal_create, OPT_BOOL, false)
OPTION(bluestore_block_preallocate_file, OPT_BOOL, false) //whether preallocate space if block/db_path/wal_path is file rather that block device.
OPTION(bluestore_min_alloc_size, OPT_U32, 64*1024)
OPTION(bluestore_onode_map_size, OPT_U32, 1024) // onodes per collection
OPTION(bluestore_cache_tails, OPT_BOOL, true) // cache tail blocks in Onode

28
src/os/bluestore/BlueStore.cc
View File

@ -1703,6 +1703,34 @@ int BlueStore::_setup_block_symlink_or_file(
VOID_TEMP_FAILURE_RETRY(::close(fd));
return r;
}
if (g_conf->bluestore_block_preallocate_file) {
#ifdef HAVE_POSIX_FALLOCATE
r = ::posix_fallocate(fd, 0, size);
if (r < 0) {
r = -errno;
derr << __func__ << " failed to prefallocate " << name << " file to "
<< size << ": " << cpp_strerror(r) << dendl;
VOID_TEMP_FAILURE_RETRY(::close(fd));
return r;
}
#else
char data[1024*128];
for (uint64_t off = 0; off < size; off += sizeof(data)) {
if (off + sizeof(data) > size)
r = ::write(fd, data, size - off);
else
r = ::write(fd, data, sizeof(data));
if (r < 0) {
r = -errno;
derr << __func__ << " failed to prefallocate w/ write " << name << " file to "
<< size << ": " << cpp_strerror(r) << dendl;
VOID_TEMP_FAILURE_RETRY(::close(fd));
return r;
}
}
#endif
}
dout(1) << __func__ << " resized " << name << " file to "
<< pretty_si_t(size) << "B" << dendl;
}