CassandraSF2011でMyCassandraの宣伝目的に一週間シリコンバレーに行ってきました。その他にも幾つかの会社をアポとって回ったので、その体験記を公開します。

1. Shunsuke Nakamura

2. musicians
google, facebook, twitter, ....

3. ...

4. MyCassandra

5. → San Francisco
7/10 16:05 SF 9:22 (9 )
-16
SF
( − )
( )

6. San Francisco
Japan: 25-33℃, hot and wet
SF: 13-20℃, cool
T + or

7. 1 : , Pre-Cassandra SF Happy Hour
2 : Cassandra SF 2011 ←
3 : , Twitter , Pier 39, Thanh Long
4 : Fisherman's Wharf, , PARC , Facebook , Stanford Shopping Center, Castro St.
5 : ITOCHU Technology , Google , Computer History Museum, Santana Row
6 : Stanford University, Apple , Hacker Dojo , , Hacker Dojo Happy Hour
7 :

8. Rodeway Inn Civic Center / 2 days
1 : , Pre-Cassandra SF Happy Hour
2 : Cassandra SF 2011 ←
Aida Plaza Hotel / 1 day
3 : , Twitter , Pier 39, Thanh Long
4 : Fisherman's Wharf, , PARC , Facebook , Stanford Shopping Center, Castro St.
Country Inn / 3 days
5 : ITOCHU Technology , Google , Computer History Museum, Santana Row
6 : Stanford University, Apple , Hacker Dojo , , Hacker Dojo Happy Hour
7 :

9. Pre-Cassandra SF Happy Hour

10. Fresh and Challenging
Fresh
so cool and beautiful
culture
Cha'enging
time difference
english
food (good but... large amount and junky foods)

11. Pre-Cassandra SF Happy Hour
Acunu (U.K. start up venture)
@Thirsty Bear
( )
MyCassandra ...
2, 3

12. 2
Cassandra SF

13. Cassandra SF
2011
@Misson Bay Conference Centeter
hosting: DataStax

14. Cassandra SF 2011
2 Cassandra
450 +
Datastax, Netflix, Twitter, Acunu, Apple, Github, Lucasfilm, Yahoo, Ooyala,
Cisco, VMWare,IBM Research, PayPal, Zynga, AMD, Redhat, 10gen,
Rackspace, McAfee, Gemini Mobile, Ebay
FB orz
(GSoC Cassandra )
: http://www.datastax.com/events/cassandrasf2011/presentations

17. The State of Cassandra 2011
Jonathan E'is, DataStax CTO
Cassandra multi-master, multi-DC
Cassandra : 18
Cassandra
: variable consistent level, secondary index, atomic counter
: memtable GC, compaction, read performance
0.6 → 0.7
Roadmap to 1.0

18. Cassandra at Twitter
Chris Goffinet, Twitter
Slide: http://www.scribd.com/doc/59830692/Cassandra-at-Twitter
FileSystem and I/O Schedulers
300+ nodes in production
Twitter Cassandra
1. Tweet Button: Cassandra memcache
•Memory a'ocation delays causing JVM to encounter higher latency GC
co'ections
2. Cuckoo: Ganglia (1.3 mi'. writes/sec, 112
bn. writes/day,492G of new data /h, 140MB/s writes + 70MB/s reads across cluster)
YCSB Custom Framework

19. CQL/Counters
40
Counter
Vector clock
write flow
MyCassandra (((( Д ))))

20. Replacing Datacenter Oracle with
Global Apache Cassandra on AWS
Adrian Cockcro0, netflix
Oracle on DC → Cassandra on AWS
Transitional steps
Bidirectional Replication
Oracle to SimpleDB
Queued reverse path using SQS
Backups remain in DC via Oracle
Cassandra
N=3 per zone
consistency level
ONE: ~ 1 ms
Quorum: ~ 3ms
Remote Copies: region
Backups: Full backup / Incremental / Continuous

21. ( )
Jonathan E'is 2
MyCassandra brochure

22. Brisk/Solandra
Jake Lucini, DataStax
MyCassandra Guy
Brisk
Hadoop Cassandra
OLTP, OLAP
Solanadra (Cassandra + Solr)
Lucandra (Cassandra + Lucene)
Thri1 + Order Partitioner
Token+
Partitioner

23. Cassandra Internals
Gary Dasbabek, Rackspace
Cassandra
Cassandra
( )
Cassandra changes line
0.4 (2009/09) : 43 kploc
0.5 (2010/01) : 59 kploc
0.6 (2010/04): 73 kploc (ploc = physical lines of code)
0.7 (2011/01): 122 kploc
0.8 (2011/04): 146 kploc avg. 4,500 lines / month
trunk (yesterday): 149kploc

24. LT ...
...

25. Afterparty and Hackathon@Mighty
orz

27. , Twitter, Pier 39, Thanh Long

28. :
: Aida Plaza Hotel
w
: Twitter with (Xoogler, UX )
Twitter Cassandra
Netflix
AWS
G/F/Twitter
Twitter OSS

29. Oracle
Fisherman’s Wharf, , PARC , Facebook, StanFord Shopping Center, Castro St

30. 4 :
: Fisherman’s Wharf + IN-N-OUT
: , Global Catalyst Partners
Oracle VC JTPA
DC
Sound Hound
John Tripier , PARC
Facebook ( )
Stanford Shopping Center: Stanford
: Castro St.

31. 5
ITOCHU Technology, Google, Computer History Museum, Santana Row

32. 5
ITOCHU Technology
⇒
IT
Google
MTV
MTV
Buzz Google
Google Google
MTV

33. Computer History Museum
1
Cray-1, 2, 3
Google
JJ-XX ”JJ”
a
JJ 26*10+10 = 270

34. Stanford
6
Stanford University, Apple, , Hacker Dojo Happy Hour

35. 6
Stanford Univ.
30 w
Bookstore
Hadoop NoSQL
Ruby, Python Perl 2
Tanenbaum Nagios
Apple ( )

36. Letternal
... ( )
MTV
...

37. Hacker Dojo Happy Hour
Hacker ( StarUp )
MyCassandra
( )
MongoDB dis try
...

38. SF cool Tokyo hot&wet
SF
( )

39. /