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MongoDB开发应用实践
1.
QCon beijing 2011
MongoDB : http://czone.chinavisual.com/art/4b4501548f47e8ef73699a0c.html
2.
About.me •
( nightsailer) • @nightsailer //twitter,sina,linkedin, github ... • nightsailer # gmail.com • http://nightsailer.com/
3.
MongoDB NoSQL
? Auto-shard ? • No! 08 K/V MySQL
4.
App
MMM • MySQL Percona Mysql(Master-Master) Master-Master-Slaves • HA:MMM Mysql(M1) Mysql(M2) Slave Slave
5.
• •
schema • • •
6.
MySQL *
JSON • schema • * • schema • query
7.
App
MMM/vdb11 KV KV1 KV2 Mysql(M1) Mysql(M2) Slave Slave
8.
Memcached •
Memcached • KV
9.
•
PHP/Perl • Memcached • • •
10.
• Flare • Repcached •
Redis • TC/TT
11.
Flare •
cluster , • Memcached
12.
1 • •
• • • ;-(
13.
• Cassandra • •
CouchDB •
14.
MongoDB •
Redis • Document • Redis • MySQL , • MySQL
15.
MySQL
MongoDB • MySQL MongoDB • MySQL <=> MongoDB •
16.
MySQL • Transaction • Joins •
17.
• •1
1 90% • 35 table => 10 collection • happy!
18.
MongoDB,
GridFS • • • MogileFS
19.
MongoDB, • SourceForge • • 10gen
mailing-list • NoSQL MongoDB
20.
1 •
comments:{ _id:ObjectId(‘xxx’), art_id:2, content: ‘ ...’, replied_on: 12233 created_on: 12222 replies: [{ _id: ObjectId(‘xxx’), content: ‘ , ...’, replies:[] }]}
21.
2
/ : • • • / / ...) •
22.
2 • db.activity_stream.feed ( •
db.activity_stream.user ) • db.activity_stream(
23.
2 feed •
• follower collection • embed list
24.
3:
1: Regex • 2: Sphinx • xml •
25.
3:
3: Array/List ($all) • • PHP-SCWS • : • oplog
26.
MongoDB • Scons,
Python • boost(CentOS) • static link mongod • tcmalloc
27.
•
MongoDB( ICC COMMON_CXXFLAGS='-fp-model source -unroll2 -axSSE4.1,SSE4.2 -xSSE3 - static-intel -fpic -fno-strict-aliasing' CXXFLAGS="-O3 -ipo -static-libgcc $COMMON_CXXFLAGS" scons --release --static --extrapath=/opt/local --cxx=$CXX --icc -- extralib='tcmalloc_minimal' --icc-cxxflags="$CXXFLAGS" --icc- cppflags="$CPPFLAGS" -c $BIN_SERVER scons -j4 --release --static --extrapath=/opt/local --cxx=$CXX --icc --extralib='tcmalloc_minimal' --icc-cxxflags="$CXXFLAGS" --icc- cppflags="$CPPFLAGS" $BIN_SERVER
28.
• •
29.
•
Raid10 • • XFS • Ext4 (?)
30.
PHP-FPM
2009/6, 0.9/1.0 • 1 Master + 2 slaves Nginx Mongod Master) Gearman-workers • 1m • 20g Mongod Slave) Gearman-workers • Dell 2850/4g(Master) 2*Dell 2950/4g(
31.
*
Slave • * lvm snapshot • • fsync & lock db * mongodump •
32.
• mongostat /
vmstat / iostat • collectd • : json-rest+perl plugin • Munion / Nagios ...
33.
MongoDB
• CPU • 4G • IO :http://czone.chinavisual.com/art/4c7918b74979590970b80000.html
34.
6 :http://czone.chinavisual.com/art/4b45015496ddabef73f49197.html
35.
Why? •
Map/Reduce / • • 1.6+ • ** reIndex repairDatabase,
36.
0: * MongoDB • Out
of Memory! • v1.3 * cursor • Perl driver bug,
37.
0:
1: • • 2 2: • driver • driver
38.
1:50x
502 Bad Gateway * GridFS • Perl Plack Starman/Plack Nginx Proxy store MongoDB Disk Cache * GridFS • Nginx proxy_store •
39.
1:50x 504 Gateway timeout
• • • Perl nginx_errorlog 5 mongodb.log • client
40.
1:50x
3 • XFS pre-allocation FS • for i in {1..50} do echo $i head -c 2146435072 /dev/zero > $db.$i done
41.
2: • Mongod crash •
Why? • Map/Reduce / •
42.
: http://czone.chinavisual.com/art/4cad0e08497959d621a10000.html
43.
•
• 10 • MongoDB • Repair 5 • • 10 : http://czone.chinavisual.com/art/4cad0e08497959d621a10000.html
44.
• MongoDB •
• cluster : slave •
45.
1 •
--syndelay • 60s(default) => 15~30s • IO • fsync •
46.
2 •
1.6.3, Master-Slaves RelicaSets • 1 Primary + 2 Secondary • 4g-8g • w=2 •
47.
5 • • • •
48.
:http://czone.chinavisual.com/art/4bd19d3b4979593e1a350000.html
49.
4: RS fail-over •
MongoDB • Primary kill 2 secondary • secondary
50.
4: RS fail-over •
2 Arbitor • $ mongod --bind_ip 127.0.0.1,192.168.8.10 -- replSet rs10 --oplogSize 1 ... • > rs.addArb(‘192.168.8.10:27020’) • ...
51.
4: RS fail-over
6: ReplicaSet • 1 Primary + 2 Secondary + n Arbitor • •
52.
•6
“ ” • ;-( • • ReplicaSet fail-over secondary • Primary , •
53.
1.8 • 1.8
• journaling file • mongod -dur • crash repairDatabase •
54.
• GridFS •
10mb-500mb •
55.
• GridFS
• Nginx proxy_store • MongoDB • ,Plack app • prefork
56.
• GridFS
• • slaveOK • Plack app Twiggy AnyEvent
57.
Starman workers/PSGI
Starman RS02 Nginx Gearman 127.0.0.1:9001 127.0.0.1:9002 127.0.0.1:9003 127.0.0.1:9004 Twiggy/PSGI RS01 (slaveOK) Sencondary
58.
• • •
59.
Primary
• Slave only IDC Secondary1 MongoD Secondary2 ReplicaSet1 • priority 0 VPN • VPN 2 IDC Slave1
60.
•
>300ms • MongoDB
61.
•
MongoDB • snapshot • • local.oplog.rs ( tailable cursor) • • replay oplog
62.
•
2 • GridFS • VPN
63.
•
VPN • GridFS • • BSON HTTP • mongod
64.
7
• • • • unix : http://czone.chinavisual.com/art/4c05e7be4979596b7e570000.html
65.
Auto-sharding • 1.6GA
Auto-sharding • •2 1 • •
66.
• Shard_key •
shard key chunk • 4sq • shard_key • counting • chunk • balancer
67.
•
• shard • shard • • 1.8
68.
• • MongoDB
auto-shard • GA • 2.0+ ?
69.
MongoDB • MySQL Web •
Schema free • Geo • MySQL • GridFS • sharding • Auto-sharding shared_key balancing 1.8/2.0
70.
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