rocksdb: add option: writable_file_max_buffer_size = 0

This reduce memcopy between rocksdb and bluefs.

Signed-off-by: Jianpeng Ma <jianpeng.ma@intel.com>

diff --git a/src/common/config_opts.h b/src/common/config_opts.h
index fb074b50f7def0c37612e3c9e0ed1a7e0d86a147..29840ff53147f1bbe0a7cb135222a38523adbff3 100644 (file)
--- a/src/common/config_opts.h
+++ b/src/common/config_opts.h
@@ -1043,7 +1043,7 @@ OPTION(bluestore_freelist_type, OPT_STR, "bitmap") // extent | bitmap
 OPTION(bluestore_freelist_blocks_per_key, OPT_INT, 128)
 OPTION(bluestore_bitmapallocator_blocks_per_zone, OPT_INT, 1024) // must be power of 2 aligned, e.g., 512, 1024, 2048...
 OPTION(bluestore_bitmapallocator_span_size, OPT_INT, 1024) // must be power of 2 aligned, e.g., 512, 1024, 2048...
-OPTION(bluestore_rocksdb_options, OPT_STR, "compression=kNoCompression,max_write_buffer_number=4,min_write_buffer_number_to_merge=1,recycle_log_file_num=4,write_buffer_size=268435456")
+OPTION(bluestore_rocksdb_options, OPT_STR, "compression=kNoCompression,max_write_buffer_number=4,min_write_buffer_number_to_merge=1,recycle_log_file_num=4,write_buffer_size=268435456,writable_file_max_buffer_size=0")
 OPTION(bluestore_fsck_on_mount, OPT_BOOL, false)
 OPTION(bluestore_fsck_on_mount_deep, OPT_BOOL, true)
 OPTION(bluestore_fsck_on_umount, OPT_BOOL, false)