RepoMirrors/ceph
1
0
Fork 0
mirror of https://github.com/ceph/ceph synced 2025-02-23 11:07:35 +00:00
Code Issues Packages Projects Releases Wiki Activity

common/options: Set bluestore min_alloc size to 4K

Browse Source 
Signed-off-by: Mark Nelson <mnelson@redhat.com>
This commit is contained in:
Mark Nelson 2019-10-02 12:18:38 -05:00
parent 804458bf51
commit 0ec75c99dd
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/common/options.cc
View File

@ -4492,13 +4492,13 @@ std::vector<Option> get_global_options() {
.set_long_description("A smaller allocation size generally means less data is read and then rewritten when a copy-on-write operation is triggered (e.g., when writing to something that was recently snapshotted). Similarly, less data is journaled before performing an overwrite (writes smaller than min_alloc_size must first pass through the BlueStore journal). Larger values of min_alloc_size reduce the amount of metadata required to describe the on-disk layout and reduce overall fragmentation."),
Option("bluestore_min_alloc_size_hdd", Option::TYPE_SIZE, Option::LEVEL_ADVANCED)
.set_default(64_K)
.set_default(4_K)
.set_flag(Option::FLAG_CREATE)
.set_description("Default min_alloc_size value for rotational media")
.add_see_also("bluestore_min_alloc_size"),
Option("bluestore_min_alloc_size_ssd", Option::TYPE_SIZE, Option::LEVEL_ADVANCED)
.set_default(16_K)
.set_default(4_K)
.set_flag(Option::FLAG_CREATE)
.set_description("Default min_alloc_size value for non-rotational (solid state) media")
.add_see_also("bluestore_min_alloc_size"),