Максим Сабарня “NoSQL: Not only SQL in developer’s life”

1. in developer's life :-)
Maxim Sabarnya
aka Sabik

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● Node
● Node label
● Relation
● Relation identifier
● Node properties
● Node ID

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MATCH
(me:User{userId:123})-[:Like]->(musicants:User)-
[:Author]->(s:Soundtrack)-[:Used]->(f:Film)<-[:Starred]-
(actor: User)<-[:Like]-(u:User) RETURN u

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Customers

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● Bson data format
● Powerful query language
● Replication
● Sharding
● Auto failover
● Indexes
● “Transactions”
● Left join

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Data aggregation

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Aggregate over a single collection (1,632,803 documents)

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Finding direct neighbors plus the neighbors of the neighbors for 1000 vertices

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(((owner_id:"1" AND _missing_ : assignments)
OR (owner_id:"1 " AND assignments.is_declined : true)
OR (owner_id:"1" AND NOT assignments.obj_status :
active)
OR (assignments.assignee_id : "1" AND assignments.
is_declined:false))
AND NOT (assignments.assignee_id : "1" AND
assignments.is_completed : true))

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● In memory DB
● Fast and simple
● “Transactions”
● Pub / Sub
● Partitioning and replication

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● Lists
● Sets
● Sorted Sets
● Hashes
Supported data types :

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● Scalability
● High availability
● Performance
● Replication
● Sharding
● Automatic failover
● CQL

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Cluster settings
cassandra.yaml
cluster_name: 'Cluster Name'
authenticator: PasswordAuthenticator
seed_provider:
- class_name: org.apache.cassandra.locator.SimpleSeedProvider
parameters:
- seeds: "ip1, ip2, ip3"
listen_address: ip
broadcast_rpc_address: ip
auto_bootstrap: true

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CREATE ( KEYSPACE | SCHEMA ) IF NOT EXISTS keyspace_name
WITH REPLICATION = map
{ 'class' : 'SimpleStrategy', 'replication_factor' : 2 };

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ANY,
ONE, TWO, THREE,
QUORUM,
ALL,
LOCAL_QUORUM,
EACH_QUORUM
Consistency levels

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(WRITE CL + READ CL) > REPLICATION FACTOR
WRITE ALL + READ ONE
WRITE ONE + READ ALL
WRITE QUORUM + READ
QUORUM

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CQL3 data type Java type
ascii java.lang.String
bigint long
blob java.nio.ByteBuffer
boolean boolean
counter long
decimal java.math.BigDecimal
double double
float float
inet java.net.InetAddress
int int

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CQL3 data type Java type
list java.util.List<T>
map java.util.Map<K, V>
set java.util.Set<T>
text java.lang.String
timestamp java.util.Date
timeuuid java.util.UUID
uuid java.util.UUID
varchar java.lang.String
varint java.math.BigInteger

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cqlsh> SELECT * FROM users_by_name WHERE first_name = 'jane';

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CREATE TABLE user_history (
user_hash_from varchar,
user_hash_to varchar,
message varchar,
date bigint,
uuid varchar,
key varchar,
PRIMARY KEY (key, date, user_hash_from, user_hash_to, uuid)
) WITH CLUSTERING ORDER BY (date DESC);

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41. email: maxim.sabarnya@ardas.ua
skype: sabarnya.maxim
Questions?