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package shell
import (
"flag"
"fmt"
"io"
)
func init() {
Commands = append(Commands, &commandEcBalance{})
}
type commandEcBalance struct {
}
func (c *commandEcBalance) Name() string {
return "ec.balance"
}
func (c *commandEcBalance) Help() string {
return `balance all ec shards among all racks and volume servers
ec.balance [-c EACH_COLLECTION|<collection_name>] [-force] [-dataCenter <data_center>] [-shardReplicaPlacement <replica_placement>]
Algorithm:
` + ecBalanceAlgorithmDescription
}
func (c *commandEcBalance) HasTag(CommandTag) bool {
return false
}
func (c *commandEcBalance) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
balanceCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
collection := balanceCommand.String("collection", "EACH_COLLECTION", "collection name, or \"EACH_COLLECTION\" for each collection")
dc := balanceCommand.String("dataCenter", "", "only apply the balancing for this dataCenter")
shardReplicaPlacement := balanceCommand.String("shardReplicaPlacement", "", "replica placement for EC shards, or master default if empty")
maxParallelization := balanceCommand.Int("maxParallelization", DefaultMaxParallelization, "run up to X tasks in parallel, whenever possible")
applyBalancing := balanceCommand.Bool("force", false, "apply the balancing plan")
if err = balanceCommand.Parse(args); err != nil {
return nil
}
infoAboutSimulationMode(writer, *applyBalancing, "-force")
if err = commandEnv.confirmIsLocked(args); err != nil {
return
}
var collections []string
if *collection == "EACH_COLLECTION" {
collections, err = ListCollectionNames(commandEnv, false, true)
if err != nil {
return err
}
} else {
collections = append(collections, *collection)
}
fmt.Printf("balanceEcVolumes collections %+v\n", len(collections))
rp, err := parseReplicaPlacementArg(commandEnv, *shardReplicaPlacement)
if err != nil {
return err
}
return EcBalance(commandEnv, collections, *dc, rp, *maxParallelization, *applyBalancing)
}
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