mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
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451 lines
17 KiB
Go
451 lines
17 KiB
Go
// Copyright 2018 The LevelDB-Go and Pebble Authors. All rights reserved. Use
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// of this source code is governed by a BSD-style license that can be found in
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// the LICENSE file.
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package sstable
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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"math"
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"reflect"
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"sort"
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"unsafe"
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"github.com/cockroachdb/pebble/internal/intern"
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)
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const propertiesBlockRestartInterval = math.MaxInt32
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const propGlobalSeqnumName = "rocksdb.external_sst_file.global_seqno"
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var propTagMap = make(map[string]reflect.StructField)
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var propBoolTrue = []byte{'1'}
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var propBoolFalse = []byte{'0'}
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var propOffsetTagMap = make(map[uintptr]string)
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func generateTagMaps(t reflect.Type, indexPrefix []int) {
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for i := 0; i < t.NumField(); i++ {
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f := t.Field(i)
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if f.Type.Kind() == reflect.Struct {
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if tag := f.Tag.Get("prop"); i == 0 && tag == "pebble.embbeded_common_properties" {
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// CommonProperties struct embedded in Properties. Note that since
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// CommonProperties is placed at the top of properties we can use
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// the offsets of the fields within CommonProperties to determine
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// the offsets of those fields within Properties.
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generateTagMaps(f.Type, []int{i})
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continue
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}
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panic("pebble: unknown struct type in Properties")
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}
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if tag := f.Tag.Get("prop"); tag != "" {
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switch f.Type.Kind() {
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case reflect.Bool:
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case reflect.Uint32:
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case reflect.Uint64:
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case reflect.String:
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default:
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panic(fmt.Sprintf("unsupported property field type: %s %s", f.Name, f.Type))
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}
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if len(indexPrefix) > 0 {
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// Prepend the index prefix so that we can use FieldByIndex on the top-level struct.
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f.Index = append(indexPrefix[:len(indexPrefix):len(indexPrefix)], f.Index...)
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}
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propTagMap[tag] = f
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propOffsetTagMap[f.Offset] = tag
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}
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}
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}
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func init() {
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generateTagMaps(reflect.TypeOf(Properties{}), nil)
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}
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// CommonProperties holds properties for either a virtual or a physical sstable. This
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// can be used by code which doesn't care to make the distinction between physical
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// and virtual sstables properties.
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//
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// For virtual sstables, fields are constructed through extrapolation upon virtual
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// reader construction. See MakeVirtualReader for implementation details.
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//
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// NB: The values of these properties can affect correctness. For example,
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// if NumRangeKeySets == 0, but the sstable actually contains range keys, then
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// the iterators will behave incorrectly.
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type CommonProperties struct {
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// The number of entries in this table.
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NumEntries uint64 `prop:"rocksdb.num.entries"`
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// Total raw key size.
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RawKeySize uint64 `prop:"rocksdb.raw.key.size"`
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// Total raw value size.
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RawValueSize uint64 `prop:"rocksdb.raw.value.size"`
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// Total raw key size of point deletion tombstones. This value is comparable
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// to RawKeySize.
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RawPointTombstoneKeySize uint64 `prop:"pebble.raw.point-tombstone.key.size"`
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// Sum of the raw value sizes carried by point deletion tombstones
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// containing size estimates. See the DeleteSized key kind. This value is
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// comparable to Raw{Key,Value}Size.
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RawPointTombstoneValueSize uint64 `prop:"pebble.raw.point-tombstone.value.size"`
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// The number of point deletion entries ("tombstones") in this table that
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// carry a size hint indicating the size of the value the tombstone deletes.
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NumSizedDeletions uint64 `prop:"pebble.num.deletions.sized"`
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// The number of deletion entries in this table, including both point and
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// range deletions.
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NumDeletions uint64 `prop:"rocksdb.deleted.keys"`
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// The number of range deletions in this table.
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NumRangeDeletions uint64 `prop:"rocksdb.num.range-deletions"`
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// The number of RANGEKEYDELs in this table.
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NumRangeKeyDels uint64 `prop:"pebble.num.range-key-dels"`
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// The number of RANGEKEYSETs in this table.
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NumRangeKeySets uint64 `prop:"pebble.num.range-key-sets"`
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// Total size of value blocks and value index block. Only serialized if > 0.
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ValueBlocksSize uint64 `prop:"pebble.value-blocks.size"`
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}
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// String is only used for testing purposes.
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func (c *CommonProperties) String() string {
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var buf bytes.Buffer
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v := reflect.ValueOf(*c)
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loaded := make(map[uintptr]struct{})
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writeProperties(loaded, v, &buf)
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return buf.String()
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}
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// NumPointDeletions is the number of point deletions in the sstable. For virtual
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// sstables, this is an estimate.
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func (c *CommonProperties) NumPointDeletions() uint64 {
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return c.NumDeletions - c.NumRangeDeletions
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}
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// Properties holds the sstable property values. The properties are
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// automatically populated during sstable creation and load from the properties
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// meta block when an sstable is opened.
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type Properties struct {
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// CommonProperties needs to be at the top of the Properties struct so that the
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// offsets of the fields in CommonProperties match the offsets of the embedded
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// fields of CommonProperties in Properties.
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CommonProperties `prop:"pebble.embbeded_common_properties"`
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// The name of the comparer used in this table.
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ComparerName string `prop:"rocksdb.comparator"`
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// The compression algorithm used to compress blocks.
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CompressionName string `prop:"rocksdb.compression"`
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// The compression options used to compress blocks.
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CompressionOptions string `prop:"rocksdb.compression_options"`
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// The total size of all data blocks.
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DataSize uint64 `prop:"rocksdb.data.size"`
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// The external sstable version format. Version 2 is the one RocksDB has been
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// using since 5.13. RocksDB only uses the global sequence number for an
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// sstable if this property has been set.
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ExternalFormatVersion uint32 `prop:"rocksdb.external_sst_file.version"`
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// The name of the filter policy used in this table. Empty if no filter
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// policy is used.
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FilterPolicyName string `prop:"rocksdb.filter.policy"`
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// The size of filter block.
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FilterSize uint64 `prop:"rocksdb.filter.size"`
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// The global sequence number to use for all entries in the table. Present if
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// the table was created externally and ingested whole.
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GlobalSeqNum uint64 `prop:"rocksdb.external_sst_file.global_seqno"`
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// Total number of index partitions if kTwoLevelIndexSearch is used.
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IndexPartitions uint64 `prop:"rocksdb.index.partitions"`
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// The size of index block.
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IndexSize uint64 `prop:"rocksdb.index.size"`
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// The index type. TODO(peter): add a more detailed description.
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IndexType uint32 `prop:"rocksdb.block.based.table.index.type"`
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// For formats >= TableFormatPebblev4, this is set to true if the obsolete
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// bit is strict for all the point keys.
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IsStrictObsolete bool `prop:"pebble.obsolete.is_strict"`
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// The name of the merger used in this table. Empty if no merger is used.
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MergerName string `prop:"rocksdb.merge.operator"`
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// The number of blocks in this table.
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NumDataBlocks uint64 `prop:"rocksdb.num.data.blocks"`
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// The number of merge operands in the table.
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NumMergeOperands uint64 `prop:"rocksdb.merge.operands"`
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// The number of RANGEKEYUNSETs in this table.
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NumRangeKeyUnsets uint64 `prop:"pebble.num.range-key-unsets"`
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// The number of value blocks in this table. Only serialized if > 0.
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NumValueBlocks uint64 `prop:"pebble.num.value-blocks"`
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// The number of values stored in value blocks. Only serialized if > 0.
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NumValuesInValueBlocks uint64 `prop:"pebble.num.values.in.value-blocks"`
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// The name of the prefix extractor used in this table. Empty if no prefix
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// extractor is used.
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PrefixExtractorName string `prop:"rocksdb.prefix.extractor.name"`
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// If filtering is enabled, was the filter created on the key prefix.
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PrefixFiltering bool `prop:"rocksdb.block.based.table.prefix.filtering"`
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// A comma separated list of names of the property collectors used in this
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// table.
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PropertyCollectorNames string `prop:"rocksdb.property.collectors"`
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// Total raw rangekey key size.
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RawRangeKeyKeySize uint64 `prop:"pebble.raw.range-key.key.size"`
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// Total raw rangekey value size.
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RawRangeKeyValueSize uint64 `prop:"pebble.raw.range-key.value.size"`
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// The total number of keys in this table that were pinned by open snapshots.
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SnapshotPinnedKeys uint64 `prop:"pebble.num.snapshot-pinned-keys"`
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// The cumulative bytes of keys in this table that were pinned by
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// open snapshots. This value is comparable to RawKeySize.
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SnapshotPinnedKeySize uint64 `prop:"pebble.raw.snapshot-pinned-keys.size"`
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// The cumulative bytes of values in this table that were pinned by
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// open snapshots. This value is comparable to RawValueSize.
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SnapshotPinnedValueSize uint64 `prop:"pebble.raw.snapshot-pinned-values.size"`
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// Size of the top-level index if kTwoLevelIndexSearch is used.
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TopLevelIndexSize uint64 `prop:"rocksdb.top-level.index.size"`
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// User collected properties.
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UserProperties map[string]string
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// If filtering is enabled, was the filter created on the whole key.
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WholeKeyFiltering bool `prop:"rocksdb.block.based.table.whole.key.filtering"`
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// Loaded set indicating which fields have been loaded from disk. Indexed by
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// the field's byte offset within the struct
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// (reflect.StructField.Offset). Only set if the properties have been loaded
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// from a file. Only exported for testing purposes.
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Loaded map[uintptr]struct{}
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}
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// NumPointDeletions returns the number of point deletions in this table.
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func (p *Properties) NumPointDeletions() uint64 {
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return p.NumDeletions - p.NumRangeDeletions
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}
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// NumRangeKeys returns a count of the number of range keys in this table.
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func (p *Properties) NumRangeKeys() uint64 {
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return p.NumRangeKeyDels + p.NumRangeKeySets + p.NumRangeKeyUnsets
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}
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func writeProperties(loaded map[uintptr]struct{}, v reflect.Value, buf *bytes.Buffer) {
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vt := v.Type()
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for i := 0; i < v.NumField(); i++ {
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ft := vt.Field(i)
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if ft.Type.Kind() == reflect.Struct {
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// Embedded struct within the properties.
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writeProperties(loaded, v.Field(i), buf)
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continue
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}
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tag := ft.Tag.Get("prop")
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if tag == "" {
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continue
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}
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f := v.Field(i)
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// TODO(peter): Use f.IsZero() when we can rely on go1.13.
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if zero := reflect.Zero(f.Type()); zero.Interface() == f.Interface() {
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// Skip printing of zero values which were not loaded from disk.
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if _, ok := loaded[ft.Offset]; !ok {
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continue
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}
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}
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fmt.Fprintf(buf, "%s: ", tag)
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switch ft.Type.Kind() {
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case reflect.Bool:
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fmt.Fprintf(buf, "%t\n", f.Bool())
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case reflect.Uint32:
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fmt.Fprintf(buf, "%d\n", f.Uint())
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case reflect.Uint64:
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fmt.Fprintf(buf, "%d\n", f.Uint())
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case reflect.String:
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fmt.Fprintf(buf, "%s\n", f.String())
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default:
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panic("not reached")
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}
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}
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}
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func (p *Properties) String() string {
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var buf bytes.Buffer
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v := reflect.ValueOf(*p)
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writeProperties(p.Loaded, v, &buf)
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// Write the UserProperties.
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keys := make([]string, 0, len(p.UserProperties))
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for key := range p.UserProperties {
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keys = append(keys, key)
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}
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sort.Strings(keys)
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for _, key := range keys {
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fmt.Fprintf(&buf, "%s: %s\n", key, p.UserProperties[key])
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}
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return buf.String()
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}
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func (p *Properties) load(
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b block, blockOffset uint64, deniedUserProperties map[string]struct{},
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) error {
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i, err := newRawBlockIter(bytes.Compare, b)
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if err != nil {
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return err
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}
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p.Loaded = make(map[uintptr]struct{})
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v := reflect.ValueOf(p).Elem()
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for valid := i.First(); valid; valid = i.Next() {
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if f, ok := propTagMap[string(i.Key().UserKey)]; ok {
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p.Loaded[f.Offset] = struct{}{}
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field := v.FieldByIndex(f.Index)
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switch f.Type.Kind() {
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case reflect.Bool:
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field.SetBool(bytes.Equal(i.Value(), propBoolTrue))
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case reflect.Uint32:
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field.SetUint(uint64(binary.LittleEndian.Uint32(i.Value())))
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case reflect.Uint64:
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var n uint64
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if string(i.Key().UserKey) == propGlobalSeqnumName {
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n = binary.LittleEndian.Uint64(i.Value())
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} else {
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n, _ = binary.Uvarint(i.Value())
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}
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field.SetUint(n)
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case reflect.String:
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field.SetString(intern.Bytes(i.Value()))
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default:
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panic("not reached")
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}
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continue
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}
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if p.UserProperties == nil {
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p.UserProperties = make(map[string]string)
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}
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if _, denied := deniedUserProperties[string(i.Key().UserKey)]; !denied {
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p.UserProperties[intern.Bytes(i.Key().UserKey)] = string(i.Value())
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}
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}
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return nil
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}
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func (p *Properties) saveBool(m map[string][]byte, offset uintptr, value bool) {
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tag := propOffsetTagMap[offset]
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if value {
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m[tag] = propBoolTrue
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} else {
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m[tag] = propBoolFalse
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}
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}
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func (p *Properties) saveUint32(m map[string][]byte, offset uintptr, value uint32) {
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var buf [4]byte
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binary.LittleEndian.PutUint32(buf[:], value)
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m[propOffsetTagMap[offset]] = buf[:]
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}
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func (p *Properties) saveUint64(m map[string][]byte, offset uintptr, value uint64) {
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var buf [8]byte
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binary.LittleEndian.PutUint64(buf[:], value)
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m[propOffsetTagMap[offset]] = buf[:]
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}
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func (p *Properties) saveUvarint(m map[string][]byte, offset uintptr, value uint64) {
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var buf [10]byte
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n := binary.PutUvarint(buf[:], value)
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m[propOffsetTagMap[offset]] = buf[:n]
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}
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func (p *Properties) saveString(m map[string][]byte, offset uintptr, value string) {
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m[propOffsetTagMap[offset]] = []byte(value)
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}
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func (p *Properties) save(tblFormat TableFormat, w *rawBlockWriter) {
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m := make(map[string][]byte)
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for k, v := range p.UserProperties {
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m[k] = []byte(v)
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}
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if p.ComparerName != "" {
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p.saveString(m, unsafe.Offsetof(p.ComparerName), p.ComparerName)
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}
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if p.CompressionName != "" {
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p.saveString(m, unsafe.Offsetof(p.CompressionName), p.CompressionName)
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}
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if p.CompressionOptions != "" {
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p.saveString(m, unsafe.Offsetof(p.CompressionOptions), p.CompressionOptions)
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}
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p.saveUvarint(m, unsafe.Offsetof(p.DataSize), p.DataSize)
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if p.ExternalFormatVersion != 0 {
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p.saveUint32(m, unsafe.Offsetof(p.ExternalFormatVersion), p.ExternalFormatVersion)
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p.saveUint64(m, unsafe.Offsetof(p.GlobalSeqNum), p.GlobalSeqNum)
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}
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if p.FilterPolicyName != "" {
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p.saveString(m, unsafe.Offsetof(p.FilterPolicyName), p.FilterPolicyName)
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}
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p.saveUvarint(m, unsafe.Offsetof(p.FilterSize), p.FilterSize)
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if p.IndexPartitions != 0 {
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p.saveUvarint(m, unsafe.Offsetof(p.IndexPartitions), p.IndexPartitions)
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p.saveUvarint(m, unsafe.Offsetof(p.TopLevelIndexSize), p.TopLevelIndexSize)
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}
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p.saveUvarint(m, unsafe.Offsetof(p.IndexSize), p.IndexSize)
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p.saveUint32(m, unsafe.Offsetof(p.IndexType), p.IndexType)
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if p.IsStrictObsolete {
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p.saveBool(m, unsafe.Offsetof(p.IsStrictObsolete), p.IsStrictObsolete)
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}
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if p.MergerName != "" {
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p.saveString(m, unsafe.Offsetof(p.MergerName), p.MergerName)
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}
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p.saveUvarint(m, unsafe.Offsetof(p.NumDataBlocks), p.NumDataBlocks)
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p.saveUvarint(m, unsafe.Offsetof(p.NumEntries), p.NumEntries)
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p.saveUvarint(m, unsafe.Offsetof(p.NumDeletions), p.NumDeletions)
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if p.NumSizedDeletions > 0 {
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p.saveUvarint(m, unsafe.Offsetof(p.NumSizedDeletions), p.NumSizedDeletions)
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}
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p.saveUvarint(m, unsafe.Offsetof(p.NumMergeOperands), p.NumMergeOperands)
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p.saveUvarint(m, unsafe.Offsetof(p.NumRangeDeletions), p.NumRangeDeletions)
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// NB: We only write out some properties for Pebble formats. This isn't
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// strictly necessary because unrecognized properties are interpreted as
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// user-defined properties, however writing them prevents byte-for-byte
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// equivalence with RocksDB files that some of our testing requires.
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if p.RawPointTombstoneKeySize > 0 && tblFormat >= TableFormatPebblev1 {
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p.saveUvarint(m, unsafe.Offsetof(p.RawPointTombstoneKeySize), p.RawPointTombstoneKeySize)
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}
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if p.RawPointTombstoneValueSize > 0 {
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p.saveUvarint(m, unsafe.Offsetof(p.RawPointTombstoneValueSize), p.RawPointTombstoneValueSize)
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}
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if p.NumRangeKeys() > 0 {
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p.saveUvarint(m, unsafe.Offsetof(p.NumRangeKeyDels), p.NumRangeKeyDels)
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p.saveUvarint(m, unsafe.Offsetof(p.NumRangeKeySets), p.NumRangeKeySets)
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p.saveUvarint(m, unsafe.Offsetof(p.NumRangeKeyUnsets), p.NumRangeKeyUnsets)
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p.saveUvarint(m, unsafe.Offsetof(p.RawRangeKeyKeySize), p.RawRangeKeyKeySize)
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p.saveUvarint(m, unsafe.Offsetof(p.RawRangeKeyValueSize), p.RawRangeKeyValueSize)
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}
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if p.NumValueBlocks > 0 {
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p.saveUvarint(m, unsafe.Offsetof(p.NumValueBlocks), p.NumValueBlocks)
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}
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if p.NumValuesInValueBlocks > 0 {
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p.saveUvarint(m, unsafe.Offsetof(p.NumValuesInValueBlocks), p.NumValuesInValueBlocks)
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}
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if p.PrefixExtractorName != "" {
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p.saveString(m, unsafe.Offsetof(p.PrefixExtractorName), p.PrefixExtractorName)
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}
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p.saveBool(m, unsafe.Offsetof(p.PrefixFiltering), p.PrefixFiltering)
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if p.PropertyCollectorNames != "" {
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p.saveString(m, unsafe.Offsetof(p.PropertyCollectorNames), p.PropertyCollectorNames)
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}
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if p.SnapshotPinnedKeys > 0 {
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p.saveUvarint(m, unsafe.Offsetof(p.SnapshotPinnedKeys), p.SnapshotPinnedKeys)
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p.saveUvarint(m, unsafe.Offsetof(p.SnapshotPinnedKeySize), p.SnapshotPinnedKeySize)
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p.saveUvarint(m, unsafe.Offsetof(p.SnapshotPinnedValueSize), p.SnapshotPinnedValueSize)
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}
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p.saveUvarint(m, unsafe.Offsetof(p.RawKeySize), p.RawKeySize)
|
|
p.saveUvarint(m, unsafe.Offsetof(p.RawValueSize), p.RawValueSize)
|
|
if p.ValueBlocksSize > 0 {
|
|
p.saveUvarint(m, unsafe.Offsetof(p.ValueBlocksSize), p.ValueBlocksSize)
|
|
}
|
|
p.saveBool(m, unsafe.Offsetof(p.WholeKeyFiltering), p.WholeKeyFiltering)
|
|
|
|
if tblFormat < TableFormatPebblev1 {
|
|
m["rocksdb.column.family.id"] = binary.AppendUvarint([]byte(nil), math.MaxInt32)
|
|
m["rocksdb.fixed.key.length"] = []byte{0x00}
|
|
m["rocksdb.index.key.is.user.key"] = []byte{0x00}
|
|
m["rocksdb.index.value.is.delta.encoded"] = []byte{0x00}
|
|
m["rocksdb.oldest.key.time"] = []byte{0x00}
|
|
m["rocksdb.creation.time"] = []byte{0x00}
|
|
m["rocksdb.format.version"] = []byte{0x00}
|
|
}
|
|
|
|
keys := make([]string, 0, len(m))
|
|
for key := range m {
|
|
keys = append(keys, key)
|
|
}
|
|
sort.Strings(keys)
|
|
for _, key := range keys {
|
|
w.add(InternalKey{UserKey: []byte(key)}, m[key])
|
|
}
|
|
}
|