Jason918 commented on code in PR #18801:
URL: https://github.com/apache/pulsar/pull/18801#discussion_r1044135877


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conf/standalone.conf:
##########
@@ -29,6 +29,11 @@ metadataStoreUrl=
 # Configuration file path for metadata store. It's supported by 
RocksdbMetadataStore and EtcdMetadataStore for now
 metadataStoreConfigPath=
 
+# Whether we should enable fsync for local metadata store. It's supported by 
RocksdbMetadataStore for now
+# If this flag is true, metadata writes will be slower.
+# If this flag is false, and the machine crashes, some recent metadata writes 
may be lost.
+# Note that if it is just the process that crashes (i.e., the machine does not 
reboot), no writes will be lost even if it is false.
+metadataFsyncEnabled=true

Review Comment:
   > Whether we should automatically set wal_bytes_per_sync=1 and set 
WriteOptions.sync=false ?
   
   IIUC, `WriteOptions.sync` only applies `fsync` on WAL. So there is no need 
to config `wal_bytes_per_sync`.



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