listen] build info: windows sys.
getwindowsversion(major=6, minor=1, build=7601, platform=2, service_pack='Servic
e Pack 1') BOOST_LIB_VERSION=1_49
2015-03-06T23:59:56.451+0800 I CONTROL [initandlisten] allocator: system
2015-03-06T23:59:56.453+0800 I CONTROL [initandlisten] options: { config: "C:\M
ongoDB3\Server\3.0\etc\conf\config.conf", storage: { dbPath: "C:\dataw\db", engi
ne: "wiredTiger" } }
2015-03-06T23:59:56.457+0800 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),checkpoint=(wai
t=60,log_size=2GB),statistics_log=(wait=0),
2015-03-06T23:59:56.942+0800 I NETWORK [initandlisten] waiting for connections
on port 27017 上面我启动两个mongod使用的是：
C:\datam\db : mmapv1模式
C:\dataw\db : wiredTiger模式
两个不同的文件夹，使用的两个不同的存储模式，mongoDB的3.0中强调，当指定的dbpath使用的存储引擎和你的engine不一致的时候，mongoDB是拒绝启动的哦。
?storageEngine string
Default: mmapv1
New in version 3.0.0.
Specifies the storage engine for the mongod database. Valid options include mmapv1 and wiredTiger.
If you attempt to start a mongod with a storage.dbPath that contains data files produced by a storage engine other than the one specified by ?storageEngine, mongod will refuse to start.
mmapv1上面启动wiredTiger 我们试试对C:\datam\db 使用wiredTiger的引擎： storage:
dbPath: C:\datam\db
engine: wiredTiger
结果： C:\MongoDB3\Server\3.0\bin>mongod -f C:\MongoDB3\Server\3.0\etc\conf\config.conf
2015-03-07T00:07:04.052+0800 I CONTROL [initandlisten] MongoDB starting : pid=1
1576 port=27017 dbpath=C:\datam\db 64-bit host=yanglu
2015-03-07T00:07:04.056+0800 I CONTROL [initandlisten] targetMinOS: Windows 7/W
indows Server 2008 R2
2015-03-07T00:07:04.056+0800 I CONTROL [initandlisten] db version v3.0.0
2015-03-07T00:07:04.056+0800 I CONTROL [initandlisten] git version: a841fd63943
65954886924a35076691b4d149168
2015-03-07T00:07:04.057+0800 I CONTROL [initandlisten] OpenSSL version: OpenSSL
1.0.1j-fips 15 Oct 2014
2015-03-07T00:07:04.057+0800 I CONTROL [initandlisten] build info: windows sys.
getwindowsversion(major=6, minor=1, build=7601, platform=2, service_pack='Servic
e Pack 1') BOOST_LIB_VERSION=1_49
2015-03-07T00:07:04.058+0800 I CONTROL [initandlisten] allocator: system
2015-03-07T00:07:04.059+0800 I CONTROL [initandlisten] options: { config: "C:\M
ongoDB3\Server\3.0\etc\conf\config.conf", storage: { dbPath: "C:\datam\db", engi
ne: "wiredTiger" } }
2015-03-07T00:07:04.062+0800 I STORAGE [initandlisten] exception in initAndList
en: 28574 Cannot start server. Detected data files in C:\datam\db created by sto
rage engine 'mmapv1'. The configured storage engine is 'wiredTiger'., terminatin
g
2015-03-07T00:07:04.063+0800 I CONTROL [initandlisten] dbexit: rc: 100
2015-03-07T00:07:04.062+0800 I STORAGE [initandlisten] exception in initAndList
en: 28574 Cannot start server. Detected data files in C:\datam\db created by sto
rage engine ‘mmapv1’. The configured storage engine is ‘wiredTiger’., terminatin
g
上面已经很明确写出了我们错误地在mmapv1的上面使用wiredTiger的引擎，无法启动。 wiredTiger上面启动mmapv1 我们试试对C:\dataw\db 使用mmapv1的引擎： storage:
dbPath: C:\dataw\db
engine: mmapv1
C:\MongoDB3\Server\3.0\bin>mongod -f C:\MongoDB3\Server\3.0\etc\conf\config.conf
2015-03-07T
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