Add dynamic shard size for parquet converter

CHANGELOG.md

@@ -41,6 +41,7 @@
 * [ENHANCEMENT] Querier: Support chunks cache for parquet queryable. #6805
 * [ENHANCEMENT] Parquet Storage: Add some metrics for parquet blocks and converter. #6809
 * [ENHANCEMENT] Compactor: Optimize cleaner run time. #6815
+* [ENHANCEMENT] Parquet Storage: Allow percentage based dynamic shard size for Parquet Converter. #6817
 * [BUGFIX] Ingester: Avoid error or early throttling when READONLY ingesters are present in the ring #6517
 * [BUGFIX] Ingester: Fix labelset data race condition. #6573
 * [BUGFIX] Compactor: Cleaner should not put deletion marker for blocks with no-compact marker. #6576

pkg/parquetconverter/converter.go

@@ -34,6 +34,7 @@ import (
 	"github.com/cortexproject/cortex/pkg/storage/tsdb/bucketindex"
 	"github.com/cortexproject/cortex/pkg/storage/tsdb/users"
 	"github.com/cortexproject/cortex/pkg/tenant"
+	"github.com/cortexproject/cortex/pkg/util"
 	util_log "github.com/cortexproject/cortex/pkg/util/log"
 	"github.com/cortexproject/cortex/pkg/util/services"
 	"github.com/cortexproject/cortex/pkg/util/validation"
@@ -209,8 +210,10 @@ func (c *Converter) running(ctx context.Context) error {
 
 				var ring ring.ReadRing
 				ring = c.ring
-				if c.limits.ParquetConverterTenantShardSize(userID) > 0 {
-					ring = c.ring.ShuffleShard(userID, c.limits.ParquetConverterTenantShardSize(userID))
+				shardSize := c.limits.ParquetConverterTenantShardSize(userID)
+				if shardSize > 0 {
+					dynamicShardSize := util.DynamicShardSize(c.limits.ParquetConverterTenantShardSize(userID), ring.InstancesCount())
+					ring = c.ring.ShuffleShard(userID, dynamicShardSize)
 				}
 
 				userLogger := util_log.WithUserID(userID, c.logger)

pkg/util/validation/limits.go

@@ -207,8 +207,8 @@ type Limits struct {
 	CompactorPartitionSeriesCount    int64          `yaml:"compactor_partition_series_count" json:"compactor_partition_series_count"`
 
 	// Parquet converter
-	ParquetConverterEnabled         bool `yaml:"parquet_converter_enabled" json:"parquet_converter_enabled" doc:"hidden"`
-	ParquetConverterTenantShardSize int  `yaml:"parquet_converter_tenant_shard_size" json:"parquet_converter_tenant_shard_size" doc:"hidden"`
+	ParquetConverterEnabled         bool    `yaml:"parquet_converter_enabled" json:"parquet_converter_enabled" doc:"hidden"`
+	ParquetConverterTenantShardSize float64 `yaml:"parquet_converter_tenant_shard_size" json:"parquet_converter_tenant_shard_size" doc:"hidden"`
 
 	// This config doesn't have a CLI flag registered here because they're registered in
 	// their own original config struct.
@@ -305,7 +305,7 @@ func (l *Limits) RegisterFlags(f *flag.FlagSet) {
 	f.Int64Var(&l.CompactorPartitionIndexSizeBytes, "compactor.partition-index-size-bytes", 68719476736, "Index size limit in bytes for each compaction partition. 0 means no limit")
 	f.Int64Var(&l.CompactorPartitionSeriesCount, "compactor.partition-series-count", 0, "Time series count limit for each compaction partition. 0 means no limit")
 
-	f.IntVar(&l.ParquetConverterTenantShardSize, "parquet-converter.tenant-shard-size", 0, "The default tenant's shard size when the shuffle-sharding strategy is used by the parquet converter. When this setting is specified in the per-tenant overrides, a value of 0 disables shuffle sharding for the tenant.")
+	f.Float64Var(&l.ParquetConverterTenantShardSize, "parquet-converter.tenant-shard-size", 0, "The default tenant's shard size when the shuffle-sharding strategy is used by the parquet converter. When this setting is specified in the per-tenant overrides, a value of 0 disables shuffle sharding for the tenant. If the value is < 1 and > 0 the shard size will be a percentage of the total parquet converters.")
 	f.BoolVar(&l.ParquetConverterEnabled, "parquet-converter.enabled", false, "If set, enables the Parquet converter to create the parquet files.")
 
 	// Store-gateway.
@@ -842,7 +842,7 @@ func (o *Overrides) CompactorTenantShardSize(userID string) float64 {
 }
 
 // ParquetConverterTenantShardSize returns shard size (number of converters) used by this tenant when using shuffle-sharding strategy.
-func (o *Overrides) ParquetConverterTenantShardSize(userID string) int {
+func (o *Overrides) ParquetConverterTenantShardSize(userID string) float64 {
 	return o.GetOverridesForUser(userID).ParquetConverterTenantShardSize
 }