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erasure coding: skip erasure coding if less than recommended 4 nodes

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This commit is contained in:
Chris Lu 2021-10-25 14:38:11 -07:00
parent 5296c397f4
commit 5f2d7c1589
1 changed files with 13 additions and 0 deletions
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13
weed/shell/command_ec_decode.go
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@ -4,6 +4,7 @@ import (
"context"
"flag"
"fmt"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb"
"github.com/chrislusf/seaweedfs/weed/storage/types"
"io"
@ -40,6 +41,7 @@ func (c *commandEcDecode) Do(args []string, commandEnv *CommandEnv, writer io.Wr
encodeCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
volumeId := encodeCommand.Int("volumeId", 0, "the volume id")
collection := encodeCommand.String("collection", "", "the collection name")
applyChanges := fixCommand.Bool("force", false, "force the encoding even if the cluster has less than recommended 4 nodes")
if err = encodeCommand.Parse(args); err != nil {
return nil
}
@ -56,6 +58,17 @@ func (c *commandEcDecode) Do(args []string, commandEnv *CommandEnv, writer io.Wr
return err
}
if !applyChanges {
var nodeCount int
eachDataNode(topologyInfo, func(dc string, rack RackId, dn *master_pb.DataNodeInfo) {
nodeCount++
})
if nodeCount < erasure_coding.ParityShardsCount {
glog.V(0).Infof("skip erasure coding with %d nodes, less than recommended %d nodes", nodeCount, erasure_coding.ParityShardsCount)
return nil
}
}
// volumeId is provided
if vid != 0 {
return doEcDecode(commandEnv, topologyInfo, *collection, vid)