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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,167 @@ | ||
| // Copyright 2021 Dolthub, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package commands | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "io" | ||
| "math" | ||
| "path/filepath" | ||
|
|
||
| "github.com/dolthub/dolt/go/cmd/dolt/cli" | ||
| "github.com/dolthub/dolt/go/cmd/dolt/errhand" | ||
| "github.com/dolthub/dolt/go/libraries/doltcore/dbfactory" | ||
| "github.com/dolthub/dolt/go/libraries/doltcore/env" | ||
| "github.com/dolthub/dolt/go/libraries/utils/argparser" | ||
| "github.com/dolthub/dolt/go/libraries/utils/filesys" | ||
| "github.com/dolthub/dolt/go/store/nbs" | ||
| ) | ||
|
|
||
| const tableFileIndexFlag = "index" | ||
|
|
||
| type InspectCmd struct { | ||
| } | ||
|
|
||
| // Name is returns the name of the Dolt cli command. This is what is used on the command line to invoke the command | ||
| func (cmd InspectCmd) Name() string { | ||
| return "inspect" | ||
| } | ||
|
|
||
| // Hidden should return true if this command should be hidden from the help text | ||
| func (cmd InspectCmd) Hidden() bool { | ||
| return true | ||
| } | ||
|
|
||
| // RequiresRepo should return false if this interface is implemented, and the command does not have the requirement | ||
| // that it be run from within a data repository directory | ||
| func (cmd InspectCmd) RequiresRepo() bool { | ||
| return true | ||
| } | ||
|
|
||
| // Description returns a description of the command | ||
| func (cmd InspectCmd) Description() string { | ||
| return "Inspects a Dolt Database and collects stats." | ||
| } | ||
|
|
||
| // CreateMarkdown creates a markdown file containing the helptext for the command at the given path | ||
| func (cmd InspectCmd) CreateMarkdown(wr io.Writer, commandStr string) error { | ||
| return nil | ||
| } | ||
|
|
||
| func (cmd InspectCmd) ArgParser() *argparser.ArgParser { | ||
| ap := argparser.NewArgParser() | ||
| ap.SupportsFlag(tableFileIndexFlag, "i", "Measure distribution error in table file chunk indexes.") | ||
| return ap | ||
| } | ||
|
|
||
| // Exec executes the command | ||
| func (cmd InspectCmd) Exec(ctx context.Context, commandStr string, args []string, dEnv *env.DoltEnv) int { | ||
| ap := cmd.ArgParser() | ||
| help, usage := cli.HelpAndUsagePrinters(cli.GetCommandDocumentation(commandStr, cli.CommandDocumentationContent{}, ap)) | ||
| apr := cli.ParseArgsOrDie(ap, args, help) | ||
|
|
||
| var verr errhand.VerboseError | ||
| if apr.Contains(tableFileIndexFlag) { | ||
| verr = cmd.measureChunkIndexDistribution(ctx, dEnv) | ||
| } | ||
|
|
||
| return HandleVErrAndExitCode(verr, usage) | ||
| } | ||
|
|
||
| func (cmd InspectCmd) measureChunkIndexDistribution(ctx context.Context, dEnv *env.DoltEnv) errhand.VerboseError { | ||
| newGen := filepath.Join(dEnv.GetDoltDir(), dbfactory.DataDir) | ||
| oldGen := filepath.Join(newGen, "oldgen") | ||
|
|
||
| itr, err := NewTableFileIter([]string{newGen, oldGen}, dEnv.FS) | ||
| if err != nil { | ||
| return errhand.VerboseErrorFromError(err) | ||
| } | ||
|
|
||
| sumErr, sumCnt := 0.0, 0 | ||
| for { | ||
| path, _ := itr.next() | ||
| if path == "" { | ||
| break | ||
| } | ||
|
|
||
| summary, err := cmd.processTableFile(path, dEnv.FS) | ||
| if err != nil { | ||
| return errhand.VerboseErrorFromError(err) | ||
| } | ||
| sumErr += summary.sumErr | ||
| sumCnt += int(summary.count) | ||
|
|
||
| cli.Println(summary.format()) | ||
| } | ||
| cli.Printf("average guess error: %f", sumErr/float64(sumCnt)) | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (cmd InspectCmd) processTableFile(path string, fs filesys.Filesys) (sum *chunkIndexSummary, err error) { | ||
| var rdr io.ReadCloser | ||
| rdr, err = fs.OpenForRead(path) | ||
| if err != nil { | ||
| return sum, err | ||
| } | ||
| defer func() { | ||
| cerr := rdr.Close() | ||
| if err == nil { | ||
| err = cerr | ||
| } | ||
| }() | ||
|
|
||
| var prefixes []uint64 | ||
| prefixes, err = nbs.GetTableIndexPrefixes(rdr.(io.ReadSeeker)) | ||
| if err != nil { | ||
| return sum, err | ||
| } | ||
|
|
||
| sum = &chunkIndexSummary{ | ||
| file: path, | ||
| count: uint32(len(prefixes)), | ||
| //errs: make([]float64, 0, len(prefixes)), | ||
| } | ||
|
|
||
| for i, prefix := range prefixes { | ||
| sum.addPrefix(i, prefix) | ||
| } | ||
| return | ||
| } | ||
|
|
||
| type chunkIndexSummary struct { | ||
| file string | ||
| count uint32 | ||
| //errs []float64 | ||
| sumErr float64 | ||
| maxErr float64 | ||
| } | ||
|
|
||
| func (s *chunkIndexSummary) format() string { | ||
| return fmt.Sprintf("file: %s \t count: %d sum error: %f \t max error: %f ", | ||
| s.file, s.count, s.sumErr, s.maxErr) | ||
| } | ||
|
|
||
| func (s *chunkIndexSummary) addPrefix(i int, prefix uint64) { | ||
| g := nbs.GuessPrefixOrdinal(prefix, s.count) | ||
| guessErr := math.Abs(float64(i - g)) | ||
|
|
||
| //s.errs = append(s.errs, guessErr) | ||
| s.sumErr += guessErr | ||
| if guessErr > s.maxErr { | ||
| s.maxErr = guessErr | ||
| } | ||
| } |
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