Expose EloqStore IO QoS configuration

eloqkv.ini

@@ -130,9 +130,6 @@ node_group_replica_num = 1
 # eloq_store_max_inflight_write: Maximum number of in-flight write operations.
 # eloq_store_max_inflight_write=65536
 
-# eloq_store_max_write_batch_pages: Maximum pages covered by a single write batch.
-# eloq_store_max_write_batch_pages=256
-
 # eloq_store_coroutine_stack_size: Coroutine stack size in bytes for storage workers.
 # eloq_store_coroutine_stack_size=32768
 
@@ -188,6 +185,28 @@ node_group_replica_num = 1
 # Maximum number of concurrent standby rsync/ssh jobs managed by EloqStore.
 # eloq_store_standby_max_concurrency=100
 
+# Per-disk IOPS limit. EloqStore divides this budget across the shards using
+# each store path. Set to 0 to disable IOPS limiting.
+# eloq_store_disk_rate_limit_iops=275000
+
+# Per-disk throughput limit in MB/s. Set to 0 to disable byte-rate limiting.
+# eloq_store_disk_rate_limit_mbps=0
+
+# Maximum rate-limit credit that can accumulate while idle, in milliseconds.
+# Smaller values smooth bursts; larger values allow burstier IO.
+# eloq_store_rate_limit_burst_ms=2
+
+# IO size charged as one operation by the IOPS limiter.
+# eloq_store_rate_limit_io_unit=2KB
+
+# Percentage of the rate budget reserved for background reads and writes.
+# EloqStore clamps this value to the range [1, 99].
+# eloq_store_rate_bg_ratio=25
+
+# Maximum number of in-flight device commands per shard. This complements the
+# sustained rate limit with an instantaneous queue-depth bound; 0 disables it.
+# eloq_store_max_inflight_io=0
+
 # size of each data page.
 # eloq_store_data_page_size=4096