DynomiteDB talk at RedisConf 2016 on The Redis API. Covers Redis data types, commands and how to build a CRUD application with Redis.

1. Copyright 2016 DynomiteDB
The Redis API
Simple, Composable, Powerful
Akbar S. Ahmed
@DynomiteDB

2. Copyright 2016 DynomiteDB
Simple

3. Copyright 2016 DynomiteDB
RESP (Redis protocol)
GET
SETLSET
ZUNION
Redis server
Redis API

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RESP
GET
SETLSET
ZUNION
Pluggable backends Pluggable backendsPluggable backends
Redis API

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Schema

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Schema
SELECT firstname
FROM user
where id = 7
user:id=7
key

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Data types
String
List
Set
Sorted Set
Hash

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String
h e l l o
greeting:english
Sequence of bytesX

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String
h e l l o
GETSET
SETRANGE
GETRANGE
greeting:english
STRLEN
APPEND

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String with Integer value
3 5 7 8 4
metrics:dau
INCR DECR
INCRBY DECRBY

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String with Float value
3 . 1 4 1
pie
INCRBYFLOAT

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List
web:signups
Bob Barney Ash
Ordered by insertionX
Duplicates allowedX
Fast head/tail operationsX

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List commands
Bob Barney Ash
LPUSH
LPOP
RPUSH
RPOP
LRANGE
LTRIM

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Set
employees
Bob
Jane
DavidUnorderedX
Unique membersX
Set operationsX

15. Copyright 2016 DynomiteDB
Set
SADD
SREM
SPOP
SISMEMBER
Bob
David
JaneSCARD
Sue
Pam
SINTER
SUNION
SDIFF

16. Copyright 2016 DynomiteDB
Sorted set
blog:posts:votes
RESP 5
High availability 24
Caching 350
Redis API 467
Ordered by scoreX
Unique membersX
Set operationsX

17. Copyright 2016 DynomiteDB
Sorted set
RESP 5
High availability 24
Caching 350
Redis API 467
ZADD
ZCARD
ZRANGE
ZREVRANGE
ZRANGEBYLEX
ZRANGEBYSCORE
ZCOUNT
ZLEXCOUNT
ZINCRBY
ZRANK
ZSCORE
ZINTERSTORE
ZUNIONSTORE

18. Copyright 2016 DynomiteDB
Hash
company:id=7
Key Value
Name Apple
Revenue 233B
State CA
City Cupertino
UnorderedX
Unique membersX

19. Copyright 2016 DynomiteDB
Hash
Key Value
Name Apple
Revenue 233B
State CA
City Cupertino
HGET / HMGET
HSET / HMSET
HKEYS
HGETALL

20. Copyright 2016 DynomiteDB
Ordered Unique Best for
String Index No ● Cache (text, JSON, binary)
● Counting
List Insertion No ● Fast head/tail operations
● Recent items
Set No Yes ● Existence / membership
● Set operations
Sorted set Score Yes ● Top x items
● Set operations
Hash No Yes ● Cache
● Database row / document

21. Copyright 2016 DynomiteDB
Simple, Composable, Powerful

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Redis API
CRM app
Database
Cache
Use case

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26. Copyright 2016 DynomiteDBCopyright 2016 DynomiteDB

27. Copyright 2016 DynomiteDB
if (sort === 'az') {
// Get the first 10 companies sorted alphabetically
cache.zrange(murmurhash.v2('companies:atoz'), 0, 9, handler);
} else if (sort === 'revenue') {
// Get the reverse range: sorted = high to low revenue
cache.zrevrange(murmurhash.v2('companies:rev'), 0, 9, handler);
} else if (sort === 'recent') {
cache.lrange(murmurhash.v2('companies:recent'), 0, 9, handler);
}
View Companies

28. Copyright 2016 DynomiteDB
handler()
if (reply) {
async.map(reply, getDetails, displayCompanies);
} else {
if (sort === 'az') {
db.zrange(murmurhash.v2('companies:atoz'), 0, 9, handler);
} else if (sort === 'revenue') {
db.zrevrange(murmurhash.v2('companies:rev'), 0, 9, handler);
} else if (sort === 'recent') {
db.lrange(murmurhash.v2('companies:recent'), 0, 9, handler);
}
}

29. Copyright 2016 DynomiteDB
getDetails()
cache.hgetall(key.getKeyHash(company), function(err, reply) {
if (reply) {
reply.slug = slug(reply.name.toLowerCase());
reply.qualified = (reply.qualified === 'true');
} else {
db.hgetall(key.getKeyHash(company), ...);
}
cb(null, reply)
});

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31. Copyright 2016 DynomiteDB
Generate key
// Generate text key
var keyText = 'company:name=' + slug(company.name);
// Generate hashed key
var keyHash = murmurhash.v2(keyText);

32. Copyright 2016 DynomiteDB
Save company
cache.hmset(keyHash,
'name', company.name,
'phone', company.phone,
'website', company.website,
'revenue', company.revenue,
'step', company.step,
'qualified', company.qualified.toString(),
saveToRecentCompanies
);
db.hmset(....)

33. Copyright 2016 DynomiteDB
saveToRecentCompanies()
cache.lpush(
murmurhash.v2('companies:recent'),
company.name,
saveToAlphabetical
);
db.lpush(
murmurhash.v2('companies:recent'),
company.name,
saveToAlphabetical
);

34. Copyright 2016 DynomiteDB
saveToAlphabetical()
cache.zadd(
murmurhash.v2('companies:alphabetical'),
1, company.name, saveToRevenue
);
db.zadd(
murmurhash.v2('companies:alphabetical'),
1, company.name, saveToRevenue
);

35. Copyright 2016 DynomiteDB
saveToRevenue()
cache.zadd(
murmurhash.v2('companies:revenue'),
company.revenue,
company.name,
renderNextPage
);
db.zadd(
murmurhash.v2('companies:revenue'),
company.revenue,
Company.name, renderNextPage
);

36. Copyright 2016 DynomiteDBCopyright 2016 DynomiteDB

37. Copyright 2016 DynomiteDB
Company details
cache.hgetall(key.getKeyHash(req.params.slug), showCompany);

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39. Copyright 2016 DynomiteDB
Edit company
Updating a company reuses 100% of the save
company database and cache code.

40. Copyright 2016 DynomiteDB
Thank you
https://github.com/DynomiteDB/redisconf-2016-nodejs
https://github.com/DynomiteDB/redisconf-2016-go (soon)
https://github.com/DynomiteDB/crm-nodejs (soon)
Java coming soon. Follow on Twitter for updates.
@DynomiteDB