MongoDB 3.0 is the newest and most significant release of the world’s fastest growing database. The version radically expands the use cases for MongoDB, allowing you to use it for the vast majority of all new applications. By improving performance by 7x - 10x, reducing storage needs by up to 80%, and lowering operations overhead by up to 95%, MongoDB 3.0 also dramatically increases your ability to deliver apps to market faster and more efficiently than ever before.

Download the white paper to learn about the latest features in 3.0:

• Pluggable storage engines, including WiredTiger
• Higher performance & efficiency
• Simplified operations through Ops Manager
• End-to-end auditing
• Enhanced Query Language and Tools

Support for the new WiredTiger storage engine will come later, most likely with the release of MongoDB 3.2, where it is expected to become the default storage engine for MongoDB. 

2015-09-22T11:01:04.925+0900 I CONTROL  ***** SERVER RESTARTED *****

2015-09-22T11:01:04.948+0900 I STORAGE  [initandlisten] wiredtiger_open config: create,cache_size=3G,session_max=20000,eviction=(threads_max=4),statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0),

2015-09-22T11:01:05.084+0900 I CONTROL  [initandlisten] MongoDB starting : pid=15084 port=27017 dbpath=/data/db 64-bit host=alpha-mongo1

2015-09-22T11:01:05.084+0900 I CONTROL  [initandlisten]

2015-09-22T11:01:05.084+0900 I CONTROL  [initandlisten] ** WARNING: soft rlimits too low. rlimits set to 31394 processes, 1024000 files. Number of processes should be at least 512000 : 0.5 times number of files.

2015-09-22T11:01:05.084+0900 I CONTROL  [initandlisten] db version v3.0.6

2015-09-22T11:01:05.084+0900 I CONTROL  [initandlisten] git version: 1ef45a23a4c5e3480ac919b28afcba3c615488f2

2015-09-22T11:01:05.084+0900 I CONTROL  [initandlisten] build info: Linux ip-10-67-194-123 2.6.32-220.el6.x86_64 #1 SMP Wed Nov 9 08:03:13 EST 2011 x86_64 BOOST_LIB_VERSION=1_49

2015-09-22T11:01:05.084+0900 I CONTROL  [initandlisten] allocator: tcmalloc

2015-09-22T11:01:05.084+0900 I CONTROL  [initandlisten] options: { config: "/etc/mongod.conf", net: { bindIp: "127.0.0.1", port: 27017, unixDomainSocket: { enabled: true }, wireObjectCheck: false }, processManagement: { fork: true, pidFilePath: "/var/run/mongodb/mongod.pid" }, replication: { oplogSizeMB: 10240, replSetName: "rs0" }, storage: { dbPath: "/data/db", directoryPerDB: true, engine: "wiredTiger", journal: { enabled: true } }, systemLog: { destination: "file", logAppend: true, path: "/var/log/mongodb/mongod.log" } }

2015-09-22T11:01:05.094+0900 I REPL     [initandlisten] Did not find local replica set configuration document at startup;  NoMatchingDocument Did not find replica set configuration document in local.system.replset

2015-09-22T11:01:05.101+0900 I NETWORK  [initandlisten] waiting for connections on port 27017

$ cat /etc/mongod.conf

systemLog:

  destination: file

  logAppend: true

  path: /var/log/mongodb/mongod.log

storage:

  engine: wiredTiger

  dbPath: /data/db

  directoryPerDB: true

  journal:

    enabled: true

processManagement:

  fork: true

  pidFilePath: /var/run/mongodb/mongod.pid

net:

  bindIp: 127.0.0.1

  port: 27017

  wireObjectCheck : false

  unixDomainSocket:

    enabled : true

replication:

  oplogSizeMB: 10240

  replSetName: "rs0"

--dbpath <path>  :  /data/db

--storageEngine string :  mmapv1

--wiredTigerCacheSizeGB number : the maximum of half of physical RAM or 1 gigabyte

--wiredTigerStatisticsLogDelaySecs <seconds> :  0

--wiredTigerJournalCompressor <compressor> : snappy

--wiredTigerCollectionBlockCompressor <compressor> : snappy

--wiredTigerIndexPrefixCompression <boolean> : true

--nssize <value>  : 16

--syncdelay <value> :  60

--journalCommitInterval <value> :  100 또는 30

--oplogSize <value> : 64-bit systems, the oplog is typically 5% of available disk space.

$ brew install mongodb

$ which mongo

$ cd mtools

$ cat requirements.txt

$ sudo pip install -r requirements.txt

(설치 완료)

 $ ps -ef | grep mongo

  501 68371     1   0  6:44PM ??         1:20.89 mongod --replSet replset --dbpath /mydev/opensource/aa/data/replset/rs1/db --logpath /mydev/opensource/aa/data/replset/rs1/mongod.log --port 27017 --logappend --fork

  501 68374     1   0  6:44PM ??         1:18.71 mongod --replSet replset --dbpath /mydev/opensource/aa/data/replset/rs2/db --logpath /mydev/opensource/aa/data/replset/rs2/mongod.log --port 27018 --logappend --fork

  501 68377     1   0  6:44PM ??         1:19.19 mongod --replSet replset --dbpath /mydev/opensource/aa/data/replset/rs3/db --logpath /mydev/opensource/aa/data/replset/rs3/mongod.log --port 27019 --logappend --fork

  501 70542 68555   0  7:29PM ttys002    0:00.13 mongo --port 27018

  501 84715 58108   0  8:21AM ttys011    0:00.00 grep mongo

  501 80512 16956   0  9:38PM ttys018    0:00.09 mongo

Warning: consider KEYS as a command that should only be used in production environments with extreme care. 

It may ruin performance when it is executed against large databases. 

This command is intended for debugging and special operations, such as changing your keyspace layout. 

Don't use KEYS in your regular application code. 

If you're looking for a way to find keys in a subset of your keyspace, consider using SCAN or sets.

...

• SCAN iterates the set of keys in the currently selected Redis database.
• SSCAN iterates elements of Sets types.
• HSCAN iterates fields of Hash types and their associated values.
• ZSCAN iterates elements of Sorted Set types and their associated scores.

$ redis-cli KEYS "패턴" | xargs redis-cli DEL 

(integer) 100