Package org.rocksdb

Class TableProperties

  • public class TableProperties
extends java.lang.Object
    TableProperties contains read-only properties of its associated table.

    • Method Detail

      • getDataSize

        public long getDataSize()
        Get the total size of all data blocks.
        Returns:
        the total size of all data blocks.

      • getIndexSize

        public long getIndexSize()
        Get the size of index block.
        Returns:
        the size of index block.

      • getIndexPartitions

        public long getIndexPartitions()
        Get the total number of index partitions if IndexType.kTwoLevelIndexSearch is used.
        Returns:
        the total number of index partitions.

      • getTopLevelIndexSize

        public long getTopLevelIndexSize()
        Size of the top-level index if IndexType.kTwoLevelIndexSearch is used.
        Returns:
        the size of the top-level index.

      • getIndexKeyIsUserKey

        public long getIndexKeyIsUserKey()
        Whether the index key is user key. Otherwise it includes 8 byte of sequence number added by internal key format.
        Returns:
        the index key

      • getIndexValueIsDeltaEncoded

        public long getIndexValueIsDeltaEncoded()
        Whether delta encoding is used to encode the index values.
        Returns:
        whether delta encoding is used to encode the index values.

      • getFilterSize

        public long getFilterSize()
        Get the size of filter block.
        Returns:
        the size of filter block.

      • getRawKeySize

        public long getRawKeySize()
        Get the total raw key size.
        Returns:
        the total raw key size.

      • getRawValueSize

        public long getRawValueSize()
        Get the total raw value size.
        Returns:
        the total raw value size.

      • getNumDataBlocks

        public long getNumDataBlocks()
        Get the number of blocks in this table.
        Returns:
        the number of blocks in this table.

      • getNumEntries

        public long getNumEntries()
        Get the number of entries in this table.
        Returns:
        the number of entries in this table.

      • getNumDeletions

        public long getNumDeletions()
        Get the number of deletions in the table.
        Returns:
        the number of deletions in the table.

      • getNumMergeOperands

        public long getNumMergeOperands()
        Get the number of merge operands in the table.
        Returns:
        the number of merge operands in the table.

      • getNumRangeDeletions

        public long getNumRangeDeletions()
        Get the number of range deletions in this table.
        Returns:
        the number of range deletions in this table.

      • getFormatVersion

        public long getFormatVersion()
        Get the format version, reserved for backward compatibility.
        Returns:
        the format version.

      • getFixedKeyLen

        public long getFixedKeyLen()
        Get the length of the keys.
        Returns:
        0 when the key is variable length, otherwise number of bytes for each key.

      • getColumnFamilyId

        public long getColumnFamilyId()
        Get the ID of column family for this SST file, corresponding to the column family identified by getColumnFamilyName().
        Returns:
        the id of the column family.

      • getCreationTime

        public long getCreationTime()
        The time when the SST file was created. Since SST files are immutable, this is equivalent to last modified time.
        Returns:
        the created time.

      • getOldestKeyTime

        public long getOldestKeyTime()
        Get the timestamp of the earliest key.
        Returns:
        0 means unknown, otherwise the timestamp.

      • getSlowCompressionEstimatedDataSize

        public long getSlowCompressionEstimatedDataSize()
        Get the estimated size of data blocks compressed with a relatively slower compression algorithm.
        Returns:
        0 means unknown, otherwise the timestamp.

      • getFastCompressionEstimatedDataSize

        public long getFastCompressionEstimatedDataSize()
        Get the estimated size of data blocks compressed with a relatively faster compression algorithm.
        Returns:
        0 means unknown, otherwise the timestamp.

      • getColumnFamilyName

        public byte[] getColumnFamilyName()
        Get the name of the column family with which this SST file is associated.
        Returns:
        the name of the column family, or null if the column family is unknown.

      • getFilterPolicyName

        public java.lang.String getFilterPolicyName()
        Get the name of the filter policy used in this table.
        Returns:
        the name of the filter policy, or null if no filter policy is used.

      • getComparatorName

        public java.lang.String getComparatorName()
        Get the name of the comparator used in this table.
        Returns:
        the name of the comparator.

      • getMergeOperatorName

        public java.lang.String getMergeOperatorName()
        Get the name of the merge operator used in this table.
        Returns:
        the name of the merge operator, or null if no merge operator is used.

      • getPrefixExtractorName

        public java.lang.String getPrefixExtractorName()
        Get the name of the prefix extractor used in this table.
        Returns:
        the name of the prefix extractor, or null if no prefix extractor is used.

      • getPropertyCollectorsNames

        public java.lang.String getPropertyCollectorsNames()
        Get the names of the property collectors factories used in this table.
        Returns:
        the names of the property collector factories separated by commas, e.g. {collector_name[1]},{collector_name[2]},...

      • getCompressionName

        public java.lang.String getCompressionName()
        Get the name of the compression algorithm used to compress the SST files.
        Returns:
        the name of the compression algorithm.

      • getUserCollectedProperties

        public java.util.Map<java.lang.String,​java.lang.String> getUserCollectedProperties()
        Get the user collected properties.
        Returns:
        the user collected properties.

      • getReadableProperties

        public java.util.Map<java.lang.String,​java.lang.String> getReadableProperties()
        Get the readable properties.
        Returns:
        the readable properties.

      • getPropertiesOffsets

        public java.util.Map<java.lang.String,​java.lang.Long> getPropertiesOffsets()
        The offset of the value of each property in the file.
        Returns:
        the offset of each property.

      • equals

        public boolean equals​(java.lang.Object o)
        Overrides:
        equals in class java.lang.Object

      • hashCode

        public int hashCode()
        Overrides:
        hashCode in class java.lang.Object