83 lines
2.7 KiB
Go
83 lines
2.7 KiB
Go
// Copyright 2025 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package utils
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import (
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"context"
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"github.com/pingcap/log"
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"github.com/pingcap/tidb/pkg/config/kerneltype"
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"github.com/pingcap/tidb/pkg/kv"
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"github.com/pingcap/tidb/pkg/meta"
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)
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// GenGlobalIDs generates several global ids by transaction way.
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func GenGlobalIDs(ctx context.Context, n int, storage kv.Storage) ([]int64, error) {
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ids := make([]int64, 0)
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ctx = kv.WithInternalSourceType(ctx, kv.InternalTxnBR)
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err := kv.RunInNewTxn(
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ctx,
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storage,
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true,
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func(ctx context.Context, txn kv.Transaction) error {
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var e error
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t := meta.NewMutator(txn)
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ids, e = t.GenGlobalIDs(n)
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return e
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})
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return ids, err
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}
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// CheckNextGenCompatibility determines whether the current restore task targets a Next-Gen TiDB cluster.
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//
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// Logic summary:
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// - Classic kernel + keyspaceName: unsupported combination, may consume extra disk space.
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// If checkRequirements=true, the function aborts; otherwise it only warns.
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// - Next-Gen kernel + no keyspaceName: invalid configuration, causes SST ingest panic.
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// - Next-Gen kernel + keyspaceName: valid Next-Gen restore.
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// - Otherwise: Classic restore.
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//
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// Arguments:
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//
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// keyspaceName the name of the keyspace to restore into.
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// checkRequirements if true, the function enforces strict validation and exits on conflicts.
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//
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// Returns true if the restore is considered Next-Gen; false otherwise.
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func CheckNextGenCompatibility(keyspaceName string, checkRequirements bool) bool {
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switch {
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case kerneltype.IsClassic() && len(keyspaceName) > 0:
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// Classic kernel does not support keyspace restores.
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// This may cause excessive disk usage (e.g., downloading all 3 peers).
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msg := "classic kernel does not support keyspace restore; " +
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"it may cause high disk usage. If you are certain this can be ignored, " +
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"set --check-requirements=false or better use the next-gen build instead."
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if checkRequirements {
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log.Fatal(msg)
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}
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log.Warn(msg + " Skipping check due to --check-requirements=false.")
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case kerneltype.IsNextGen():
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// Next-Gen kernel requires keyspaceName to avoid SST ingest panic.
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if len(keyspaceName) == 0 {
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log.Fatal("next-gen restore requires keyspaceName; missing value may cause SST ingest panic.")
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}
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return true
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}
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return false
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}
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