redis-advanced-types

name	redis-advanced-types
description	Master Redis advanced data types - Bitmaps, HyperLogLog, Streams, and Geospatial indexes for specialized use cases
sasmp_version	1.3.0
bonded_agent	02-redis-data-structures
bond_type	SECONDARY_BOND
version	2.1.0
last_updated	2025-01
parameters	{"data_type":{"type":"string","required":true,"enum":["bitmap","hyperloglog","stream","geo"]},"operation":{"type":"string","required":true},"precision":{"type":"string","required":false,"description":"HyperLogLog precision level"}}
retry_config	{"max_retries":3,"backoff_strategy":"exponential","backoff_base_ms":100}
observability	{"metrics":["bitmap_cardinality","hll_estimated_count","stream_length","geo_query_radius"]}

Redis Advanced Types Skill

Bitmaps

Memory-efficient bit operations for flags and counters. 512MB max = 2^32 bits.

Bitmap Commands

SETBIT key offset value           # Set bit - O(1)
GETBIT key offset                 # Get bit - O(1)
BITCOUNT key [start end [BYTE|BIT]]  # Count 1s - O(N)
BITOP AND|OR|XOR|NOT destkey key [key ...]  # Bitwise ops - O(N)
BITPOS key bit [start [end [BYTE|BIT]]]     # Find position - O(N)
BITFIELD key [GET type offset] [SET type offset value] [INCRBY type offset increment]

Pattern 1: User Activity Tracking

# Track daily logins (1 bit per day)
SETBIT user:123:logins:2024 0 1   # Jan 1
SETBIT user:123:logins:2024 4 1   # Jan 5
SETBIT user:123:logins:2024 9 1   # Jan 10

# Count login days in January
BITCOUNT user:123:logins:2024 0 3  # First 4 bytes = 31 days

# Check specific day
GETBIT user:123:logins:2024 4  # Returns 1

Pattern 2: Feature Flags

# Bit positions represent features
# 0=dark_mode, 1=notifications, 2=beta_features
SETBIT user:123:features 0 1  # Enable dark mode
SETBIT user:123:features 2 1  # Enable beta

# Check feature
GETBIT user:123:features 0  # 1 = enabled

Pattern 3: Daily Active Users

# Track DAU with bitmap
SETBIT dau:2024-01-15 123 1  # User 123 active
SETBIT dau:2024-01-15 456 1  # User 456 active

# Count DAU
BITCOUNT dau:2024-01-15

# Weekly active (OR across days)
BITOP OR wau:2024-w3 dau:2024-01-15 dau:2024-01-16 dau:2024-01-17
BITCOUNT wau:2024-w3

# Users active all 7 days (AND)
BITOP AND daily-active:week dau:2024-01-15 dau:2024-01-16 ...

HyperLogLog

Probabilistic cardinality estimation with 0.81% standard error. Only 12KB per key!

HyperLogLog Commands

PFADD key element [element ...]    # Add - O(1)
PFCOUNT key [key ...]              # Count - O(1) per key
PFMERGE destkey sourcekey [sourcekey ...]  # Merge - O(N)

Pattern 1: Unique Visitors

# Track hourly unique visitors
PFADD visitors:2024-01-15:10 "user:1" "user:2" "user:3"
PFADD visitors:2024-01-15:11 "user:2" "user:4"

# Count unique for hour
PFCOUNT visitors:2024-01-15:10  # ~3

# Daily unique (merge hours)
PFMERGE visitors:2024-01-15 visitors:2024-01-15:10 visitors:2024-01-15:11
PFCOUNT visitors:2024-01-15  # ~4

Pattern 2: Unique Search Queries

PFADD searches:2024-01 "redis tutorial" "redis commands"
PFCOUNT searches:2024-01

Streams

Append-only log with consumer groups for reliable message processing.

Stream Commands