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randomize file locations

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This commit is contained in:
Chris Lu 2020-10-07 23:58:32 -07:00
parent ec08a1670b
commit eed492b73b
1 changed files with 9 additions and 4 deletions
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13
weed/filer/reader_at.go
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@ -3,14 +3,14 @@ package filer
import (
"context"
"fmt"
"github.com/golang/groupcache/singleflight"
"io"
"sync"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/util/chunk_cache"
"github.com/chrislusf/seaweedfs/weed/wdclient"
"github.com/golang/groupcache/singleflight"
"io"
"math/rand"
"sync"
)
type ChunkReadAt struct {
@ -64,6 +64,11 @@ func LookupFn(filerClient filer_pb.FilerClient) LookupFileIdFunctionType {
targetUrls = append(targetUrls, targetUrl)
}
for i := len(targetUrls) - 1; i > 0; i-- {
j := rand.Intn(i + 1)
targetUrls[i], targetUrls[j] = targetUrls[j], targetUrls[i]
}
return
}
}