crimson/osd: create cold devices when mkfs

Signed-off-by: Zhang Song <zhangsong02@qianxin.com>
Signed-off-by: Xuehan Xu <xuxuehan@qianxin.com>

diff --git a/src/common/options/crimson.yaml.in b/src/common/options/crimson.yaml.in
index c4bad3917c9b1e52e706290789b99ac68b91e556..755fb0d5f9461b82949a558da35ec24128716c83 100644 (file)
--- a/src/common/options/crimson.yaml.in
+++ b/src/common/options/crimson.yaml.in
@@ -260,6 +260,11 @@ options:
   level: advanced
   desc: Size in bytes per second written to the hot devices, 0 indicates no limit
   default: 0
+- name: seastore_cold_devices_count
+  type: uint
+  level: dev
+  desc: create cold devices during mkfs
+  default: 0
 - name: seastore_cold_device_type
   type: str
   level: dev

diff --git a/src/crimson/osd/main.cc b/src/crimson/osd/main.cc
index 86bbbe1ab98d5ccb56aafc25734e8ba622e9087b..744cddb9a421fc8994f00e2ff8b4ae8bc57942be 100644 (file)
--- a/src/crimson/osd/main.cc
+++ b/src/crimson/osd/main.cc
@@ -264,6 +264,15 @@ int main(int argc, const char* argv[])
               // use a random osd uuid if not specified
               osd_uuid.generate_random();
             }
+            if (auto c = local_conf().get_val<uint64_t>("seastore_cold_devices_count");
+                c != 0) {
+              auto root = local_conf().get_val<std::string>("osd_data");
+              for (size_t i = 1; i <= c; i++) {
+                auto path = fmt::format("{}/block.{}", root, i);
+                seastar::touch_directory(path).get();
+              }
+              seastar::sync_directory(root).get();
+            }
             osd.mkfs(
              *store,
              whoami,