mysql's nosql -- best of both worlds on the same disks

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➔ Dave Stokes➔ MySQL Community Manager

➔ [email protected] @Stoker

MySQL's NoSQL with SQL – Best of Both Worlds

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MySQL Releases since 2010

• Enterprise Monitor 2.2, 2.3• Cluster 7.1, 7.2, 7.3• Cluster Manager 1, 1.1, 1.3• Workbench 5.2, 6, 6.1• Database 5.5, 5.6, DMR 5.7• Backup 3.5, 3.7, 3.1• Oracle VM for MySQL• Oracle Product Certifications• Windows Installer • Utilities 1.0.6• Audit• Fabric (RC)

● More Developers

● More QA

● More Support

● Making $$

● Classes popular

– Instructor lead

– Self-paced

● We're hiring!


MySQL 5.6 GA 19 Months Ago – Best GA Ever

● Performance

– Scales to 48 CPU threads

– Up to 230% faster than 5.5

● Faster Optimizer

– Performance

– Diagnostics

– Better Instrumentation● Improved Replication

● NoSQL

– Fast – 9x

– Key/value, ACID

● InnoDB

– Better Transactional throughput


MySQL Architecture


Bypassing Syntax Check and Optimizer 9x Faster


Handler Socket DeNA circa 2010

● Bypasses Optimizer & Parser

● Very Fast

● Limited Security

● Not ACID

● 750,000 accesses second


Memcached w/InnoDB – a better way

● Runs in same process space, fast –1,140,000 accesses/second

● Data can be structure or unstructured

● InnoDB handles composing/decomposing data as part of multi column support which cuts string handling in your application

● Crash safe and consistent data

● Can tune data passing between InnoDB/Memecached, transaction levels, lock metadata (no DDL while in use)

● Can password protect Memcached via SASL


Installation

● sudo apt-get install libevent-dev libmemcached-tools

● Memcached.so (already in 5.6/7)

– my.cnf

● plugin-load=libmemcached.so

– Or after boot

● mysql> install plugin daemon_memcached soname "libmemcached.so";

● Check your ulimit (Look for failed to set rlimit for open files in logs)


Installation continues

● Set up configuration tables

– innodb_memcached_config.sql

● Creates innodb_memcached schema– cache_policies

– config_options

– Containers

● Test example


Test from Memcached side

● telnet 127.0.0.1 11211● set a11 10 0 9● 123456789● STORED● get a11● VALUE a11 0 9● 123456789● END● quit

The arguments to set are

– a11 is the key

– 10 is the flag to use

– 0 is the TTL

– 9 is the length of the string to store

– 123456789 is the string to store


Test from SQL side

c1 c2 c3 c4 c6

a11 123456789 10 3 0

Data is available through both Memcached & SQL at the same time


Options you can set

● Separator and table_map_delimiter (config_options)

● Policies (cache_policies)

– Use memcached, InnoDB (or NDB) for data store

● Name, schema, table name, key columns, value columns, flags, cas_column, expiration, index to use on key


Slide to check if audience is still awake


Best uses

● Persistent Memcached layer

● Speed

– Drinking or Filling fire hose

● Simple applications, APIs

● When you don't want to pay for servers/disks for NoSQL only


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Q&A

[email protected]@stokerslideshare.net/davestokes

mysql's nosql -- best of both worlds on the same disks

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