This document summarizes a test of integrating Cassandra as a storage engine for MariaDB. It shows how Cassandra can be used as a "window" to access NoSQL data from a SQL database, allowing data to be stored, selected, updated and joined across SQL and NoSQL systems. Examples demonstrate inserting, selecting, and updating data in Cassandra tables from MariaDB.

1. A QUICK TEST OF
CASSANDRA
&
MARIADB
By Julien Duponchelle / @jduponchelle

2. MARIADB
An enhanced, drop-in replacement for MySQL
Lead developer is Michael "Monty" Widenius, the founder of MySQL

3. PROJECT GOALS
“ The primary goal of Cassandra SE (Storage Engine) is data
integration between the SQL and NoSQL world ”

4. PROJECT STATUS
Developed by MariaDB team
Working preview announced the 28 september 2012
Still in active development

5. CASSANDRA STORAGE ENGINE
A MariaDB storage Engine like InnoDB.

6. FEATURES
INSERT, DELETE, UPDATE
SELECT
Even join

7. CASSANDRA AS AN SQL DATABASE?
NO
“ Cassandra SE is rather a "window" from an SQL environment
into NoSQL. ”
You should use Hadoop for analytics queries
You should use InnoDB for transactions

8. USE CASES
Store user metrics
Simplify transition

9. EXAMPLE

10. clh CET KYPC maeoehpWT
qs> RAE ESAE ywsmso IH
..
. srtg_ls ='ipetaey
taeycas SmlSrtg'
..
. ADsrtg_pin:elcto_atr=''
N taeyotosrpiainfco 1;
clh UEmaeoehp
qs> S ywsmso;

11. clhmaeoehp CET TBEmtis(
qs:ywsmso> RAE AL erc
.. i ui PIAYKY
. d ud RMR E,
.. dt tmsap
. ae ietm,
.. ue_dbgn,
. sri iit
.. ultx
. r et
);

12. MraB[nn)>CET DTBS maeoehp
aiD (oe] RAE AAAE ywsmso;
QeyO,1rwafce (.4sc
ur K o fetd 00 e)
MraB[nn)>uemaeoehp
aiD (oe] s ywsmso;
Dtbs cagd
aaae hne
MraB[ywsmso] CET TBEues(
aiD maeoehp> RAE AL sr
-> i BGN PIAYKY
d IIT RMR E,
-> nm VRHR25)
ae ACA(5);
QeyO,0rw afce (.5sc
ur K os fetd 00 e)
MraB[ywsmso] ISR IT uesVLE (,"uin) (,"ai";
aiD maeoehp> NET NO sr AUS 1 jle", 2 mre)
QeyO,2rw afce (.0sc
ur K os fetd 00 e)
Rcrs 2 Dpiae:0 Wrig:0
eod: ulcts anns

13. MraB[ywsmso] CET TBEmtis
aiD maeoehp> RAE AL erc
- (
>
-> i CA(6 PIAYKY
d HR3) RMR E
-> dt TMSAP
ae IETM,
-> ue_dBGN,
sri IIT
-> ulVRHR25
r ACA(5)
- )egn=asnr
> niecsada
-> kypc='ywsmso'
esae maeoehp
-> clm_aiy'erc'
ounfml=mtis;

14. MraB[ywsmso] ISR IT mtisVLE (UD) NW) 1 "hm";
aiD maeoehp> NET NO erc AUS UI(, O(, , /oe)
MraB[ywsmso] SLC (aeue_dul FO mtis
aiD maeoehp> EET dt,sri,r) RM erc;
+----------+----+---+
--------------------
|dt
ae |ue_d|ul |
sri r
+----------+----+---+
--------------------
|21-01 2:22 |
021-0 02:6 1 |/oe|
hm
+----------+----+---+
--------------------
1rwi st(.2sc
o n e 00 e)

15. MraB[ywsmso] ISR IT mtisVLE (UD) NW) 2 "hm";
aiD maeoehp> NET NO erc AUS UI(, O(, , /oe)
QeyO,1rwafce (.1sc
ur K o fetd 00 e)
MraB[ywsmso] ISR IT mtisVLE (UD) NW) 1 "by)
aiD maeoehp> NET NO erc AUS UI(, O(, , /u";
QeyO,1rwafce (.0sc
ur K o fetd 00 e)

16. vgatmrabcsada~ clh
arn@aid-asnr:$ qs
Cnetdt Ts Cutra lclot96.
once o et lse t oahs:10
clh uemaeoehp;
qs> s ywsmso
clhmaeoehp SLC (aeulue_d FO mtis
qs:ywsmso> EET dt,r,sri) RM erc;
dt
ae |ul |ue_d
r sri
-------------+---+----
---------------------
21-01 2:24+00|/oe|
021-0 02:300 hm 2
21-01 2:22+00|/oe|
021-0 02:600 hm 1
21-01 2:25+00| /u |
021-0 02:400 by 1

17. MraB[ywsmso] SLC dt,r,ae
aiD maeoehp> EET aeulnm
- FO mtisues
> RM erc,sr
- WEEmtisue =uesi;
> HR erc.sr sr.d
+----------+---+----
-------------------+
|dt
ae |ul |nm
r ae |
+----------+---+----
-------------------+
|21-01 2:24 |/oe|mre |
021-0 02:3 hm ai
|21-01 2:22 |/oe|jle |
021-0 02:6 hm uin
|21-01 2:25 |/u |jle |
021-0 02:4 by uin
+----------+---+----
-------------------+
3rw i st(.1sc
os n e 00 e)

18. TRY IT AT HOME
A Vagrant Virtual Box image with:
Ubuntu 12.04
Apache Cassandra 1.1
Prebuilt version of MariaDB 5.5.27
http://bit.ly/SBzf3B

19. THE END
BY JULIEN DUPONCHELLE
JULIEN@DUPONCHELLE.INFO
@JDUPONCHELLE
Hire me!