github.com/weaviate/weaviate@v1.24.6/usecases/sharding/config_update.go (about)

     1  //                           _       _
     2  // __      _____  __ ___   ___  __ _| |_ ___
     3  // \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
     4  //  \ V  V /  __/ (_| |\ V /| | (_| | ||  __/
     5  //   \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
     6  //
     7  //  Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
     8  //
     9  //  CONTACT: hello@weaviate.io
    10  //
    11  
    12  package sharding
    13  
    14  import (
    15  	"fmt"
    16  )
    17  
    18  type nodeCounter interface {
    19  	NodeCount() int
    20  }
    21  
    22  func ValidateConfigUpdate(old, updated Config, nodeCounter nodeCounter) error {
    23  	if old.DesiredCount != updated.DesiredCount {
    24  		return fmt.Errorf("re-sharding not supported yet: shard count is immutable: "+
    25  			"attempted change from \"%d\" to \"%d\"", old.DesiredCount,
    26  			updated.DesiredCount)
    27  	}
    28  
    29  	if old.VirtualPerPhysical != updated.VirtualPerPhysical {
    30  		return fmt.Errorf("virtual shards per physical is immutable: "+
    31  			"attempted change from \"%d\" to \"%d\"", old.VirtualPerPhysical,
    32  			updated.VirtualPerPhysical)
    33  	}
    34  
    35  	return nil
    36  }