Redis 8.0 Native Vector Sets (VADD & VSIM with Q8 Quantization)

Supanote Core Team @supanote · 1 min read

plain (bash) 1 day ago · 32 lines · 4 views

Artifact

Verified Blueprint Redis 8.0+

Run sub-millisecond similarity search in Redis 8.0 using built-in Vector Sets (VADD, VSIM), 8-bit Q8 quantization, and FILTER expressions.

✓ Uses Redis 8 native Vector Set data type (designed by antirez) with zero upfront index DDL required
✓ Applies default 8-bit signed integer quantization (Q8) to shrink RAM usage by ~75% with minimal recall loss
✓ Combines HNSW vector similarity with inline JSON metadata FILTER predicates in a single VSIM call

Quick Fetch

#!/usr/bin/env bash
# Redis 8.0+ Built-In Vector Sets (VADD / VSIM / VSETATTR) Semantic Search Blueprint
# Requires Redis 8.0+ open-source unified binary (no external module configuration needed)

set -euo pipefail
REDIS_CLI="${REDIS_CLI:-redis-cli}"

# 1. Insert Embeddings With Q8 Quantization & JSON Attributes (Auto-creates HNSW Vector Set)
# Syntax: VADD <key> VALUES <dim> <f1> <f2> ... <element_id> [Q8 | BIN | NOQUANT] [SETATTR <json>]
${REDIS_CLI} VADD kb:chunks VALUES 4 0.14 -0.52 0.88 0.11 "doc:pg18-aio" Q8 \
  SETATTR '{"engine":"postgresql","version":18,"tier":"public"}'

${REDIS_CLI} VADD kb:chunks VALUES 4 0.16 -0.49 0.85 0.08 "doc:pg18-uuidv7" Q8 \
  SETATTR '{"engine":"postgresql","version":18,"tier":"public"}'

${REDIS_CLI} VADD kb:chunks VALUES 4 -0.61 0.72 0.12 -0.30 "doc:redis8-io" Q8 \
  SETATTR '{"engine":"redis","version":8,"tier":"internal"}'

# 2. Filtered Similarity Search (Hybrid ANN + Arithmetic/Boolean Attribute Filter)
echo "--- Top Public PostgreSQL Matches ---"
${REDIS_CLI} VSIM kb:chunks VALUES 4 0.15 -0.50 0.87 0.10 \
  WITHSCORES COUNT 5 \
  FILTER '.engine == "postgresql" and .tier == "public" and .version >= 18'

# 3. Search Using an Existing Element's Vector ("More Like This" Item-to-Item Recommendation)
echo "--- Similar to doc:pg18-aio ---"
${REDIS_CLI} VSIM kb:chunks ELE "doc:pg18-aio" WITHSCORES COUNT 3

# 4. Inspect Vector Set Cardinality, Quantization Mode & HNSW Graph Metadata
${REDIS_CLI} VINFO kb:chunks
${REDIS_CLI} VGETATTR kb:chunks "doc:pg18-aio"

1#!/usr/bin/env bash

2# Redis 8.0+ Built-In Vector Sets (VADD / VSIM / VSETATTR) Semantic Search Blueprint

3# Requires Redis 8.0+ open-source unified binary (no external module configuration needed)

5set -euo pipefail

6REDIS_CLI="${REDIS_CLI:-redis-cli}"

8# 1. Insert Embeddings With Q8 Quantization & JSON Attributes (Auto-creates HNSW Vector Set)

9# Syntax: VADD <key> VALUES <dim> <f1> <f2> ... <element_id> [Q8 | BIN | NOQUANT] [SETATTR <json>]

10${REDIS_CLI} VADD kb:chunks VALUES 4 0.14 -0.52 0.88 0.11 "doc:pg18-aio" Q8 \

11 SETATTR '{"engine":"postgresql","version":18,"tier":"public"}'

13${REDIS_CLI} VADD kb:chunks VALUES 4 0.16 -0.49 0.85 0.08 "doc:pg18-uuidv7" Q8 \

14 SETATTR '{"engine":"postgresql","version":18,"tier":"public"}'

16${REDIS_CLI} VADD kb:chunks VALUES 4 -0.61 0.72 0.12 -0.30 "doc:redis8-io" Q8 \

17 SETATTR '{"engine":"redis","version":8,"tier":"internal"}'

19# 2. Filtered Similarity Search (Hybrid ANN + Arithmetic/Boolean Attribute Filter)

20echo "--- Top Public PostgreSQL Matches ---"

21${REDIS_CLI} VSIM kb:chunks VALUES 4 0.15 -0.50 0.87 0.10 \

22 WITHSCORES COUNT 5 \

23 FILTER '.engine == "postgresql" and .tier == "public" and .version >= 18'

25# 3. Search Using an Existing Element's Vector ("More Like This" Item-to-Item Recommendation)

26echo "--- Similar to doc:pg18-aio ---"

27${REDIS_CLI} VSIM kb:chunks ELE "doc:pg18-aio" WITHSCORES COUNT 3

29# 4. Inspect Vector Set Cardinality, Quantization Mode & HNSW Graph Metadata

30${REDIS_CLI} VINFO kb:chunks

31${REDIS_CLI} VGETATTR kb:chunks "doc:pg18-aio"

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