redisconf 2016 talk - the redis api: simple, composable, powerful
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Copyright 2016 DynomiteDB
The Redis APISimple, Composable, Powerful
Akbar S. Ahmed@DynomiteDB
Copyright 2016 DynomiteDB
Simple
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RESP (Redis protocol)
GETSETLSET ZUNION
Redis server
Redis API
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RESP
GETSETLSET ZUNION
Pluggable backends Pluggable backendsPluggable backends
Redis API
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Schema
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Schema
SELECT firstnameFROM userwhere id = 7
user:id=7key
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Data types
StringListSetSorted SetHash
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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
SETRANGEGETRANGE
greeting:english
STRLEN
APPEND
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String with Integer value
3 5 7 8 4metrics:dau
INCR DECR
INCRBY DECRBY
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String with Float value
3 . 1 4 1pie
INCRBYFLOAT
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Listweb:signups
Bob Barney Ash
Ordered by insertionX
Duplicates allowedX
Fast head/tail operationsX
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List commands
Bob Barney AshLPUSH
LPOP
RPUSH
RPOP
LRANGELTRIM
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Setemployees
Bob
Jane
DavidUnorderedXUnique membersX
Set operationsX
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SetSADDSREMSPOP
SISMEMBER
Bob
David
JaneSCARD
SuePam
SINTER
SUNION
SDIFF
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Sorted set blog:posts:vote
sRESP 5High
availability24
Caching 350Redis API 467
Ordered by scoreXUnique membersX
Set operationsX
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Sorted set
RESP 5High
availability24
Caching 350Redis API 467
ZADD
ZCARD
ZRANGEZREVRANGE
ZRANGEBYLEX
ZRANGEBYSCORE
ZCOUNTZLEXCOUNT
ZINCRBY
ZRANKZSCORE
ZINTERSTOREZUNIONSTORE
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Hash company:id=7
Key ValueName Apple
Revenue 233BState CACity Cupertino
UnorderedXUnique membersX
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Hash
Key ValueName Apple
Revenue 233BState CACity Cupertino
HGET / HMGET
HSET / HMSET
HKEYSHGETALL
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Ordered Unique
Best for
String Index No ● Cache (text, JSON, binary)
● CountingList Insertio
nNo ● 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
Copyright 2016 DynomiteDB
Simple, Composable, Powerful
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Redis APICRM app
Database
Cache
Use case
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Copyright 2016 DynomiteDBCopyright 2016 DynomiteDB
Copyright 2016 DynomiteDBCopyright 2016 DynomiteDB
Copyright 2016 DynomiteDBCopyright 2016 DynomiteDB
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
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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); }}
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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Generate key// Generate text keyvar keyText = 'company:name=' + slug(company.name);
// Generate hashed keyvar keyHash = murmurhash.v2(keyText);
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Save companycache.hmset(keyHash, 'name', company.name, 'phone', company.phone, 'website', company.website, 'revenue', company.revenue, 'step', company.step, 'qualified', company.qualified.toString(), saveToRecentCompanies);
db.hmset(....)
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saveToRecentCompanies()cache.lpush( murmurhash.v2('companies:recent'), company.name, saveToAlphabetical);
db.lpush( murmurhash.v2('companies:recent'), company.name, saveToAlphabetical);
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saveToAlphabetical()cache.zadd( murmurhash.v2('companies:alphabetical'), 1, company.name, saveToRevenue);
db.zadd( murmurhash.v2('companies:alphabetical'), 1, company.name, saveToRevenue);
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);
Copyright 2016 DynomiteDBCopyright 2016 DynomiteDB
Copyright 2016 DynomiteDB
Company detailscache.hgetall(key.getKeyHash(req.params.slug), showCompany);
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Copyright 2016 DynomiteDB
Edit companyUpdating a company reuses 100% of the save company database and cache code.
Copyright 2016 DynomiteDB
Thank you
https://github.com/DynomiteDB/redisconf-2016-nodejshttps://github.com/DynomiteDB/redisconf-2016-go (soon)
https://github.com/DynomiteDB/crm-nodejs (soon)Java coming soon. Follow on Twitter for updates.
@DynomiteDB
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