バージョン 3.06 の mongodb.conf とデータ ファイルのサイズはわずか 240 MB です。このタイムスタンプでは、ネットワークは信頼できます。
# mongod.conf
# Where to store the data.
# Note: if you run mongodb as a non-root user (recommended) you may
# need to create and set permissions for this directory manually,
# e.g., if the parent directory isn't mutable by the mongodb user.
dbpath=/db/db32/mongodb/data/
# path to logfile
logpath=/db/db32/mongodb/logs/mongod.log
# add new entries to the end of the logfile
logappend=true
# Listen to local interface only. Comment out to listen on all interfaces.
#bind_ip = 127.0.0.1
# enable operation journaling
#journal = true
#smallfiles = true
nojournal = true
# Enables periodic logging of CPU utilization and I/O wait
cpu = true
# enable database authentication for users connecting from remote hosts
auth = true
# Verbose logging output.
#verbose = true
# Enable db quota management
#quota = true
# Set oplogging level where n is
# 0=off (default)
# 1=W
# 2=R
# 3=both
# 7=W+some reads
#diaglog = 0
# Ignore query hints
#nohints = true
# Turns off server-side scripting. This will result in greatly limited
# functionality
noscripting = true
# Turns off table scans. Any query that would do a table scan fails.
#notablescan = true
# Disable data file preallocation.
#noprealloc = true
# Specify .ns file size for new databases.
# nssize = <size>
# Replication Options
# in replicated mongo databases, specify the replica set name here
#replSet=setname
# maximum size in megabytes for replication operation log
#oplogSize=1024
# path to a key file storing authentication info for connections
# between replica set members
#keyFile=/path/to/keyfile
# Forces the mongod to validate all requests from clients
objcheck = true
# Disable HTTP status interface
nohttpinterface = true
# disable REST interface
rest = false
# database profiling 1 = only includes slow operations
profile = 1
# logs slow queries to the log
slowms = 100
# maximum number of simultaneous connections
maxConns = 25
詳細フラグ付きの mongodump。サーバー ログには、このタイムスタンプへのエントリはありません。
(...)
2016-03-09T16:51:17.378+0100 enqueued collection 'Tetzi005.xxx'
2016-03-09T16:51:17.384+0100 enqueued collection 'Tetzi005.xxxxxx'
2016-03-09T16:51:17.391+0100 enqueued collection 'Tetzi005.system.indexes'
2016-03-09T16:51:17.391+0100 finalizing intent manager with longest task first prioritizer
2016-03-09T16:51:17.391+0100 dumping with 8 job threads
2016-03-09T16:51:17.391+0100 starting dump routine with id=0
2016-03-09T16:51:17.391+0100 starting dump routine with id=4
2016-03-09T16:51:17.391+0100 starting dump routine with id=1
2016-03-09T16:51:17.391+0100 writing Tetzi005.DailyEmailUser to dbbackup/dump/Tetzi005/xxxxxxx.bson
2016-03-09T16:51:17.391+0100 starting dump routine with id=3
2016-03-09T16:51:17.391+0100 starting dump routine with id=6
2016-03-09T16:51:17.391+0100 writing Tetzi005.Prototype to dbbackup/dump/Tetzi005/xxxxxxx.bson
2016-03-09T16:51:17.392+0100 starting dump routine with id=7
2016-03-09T16:51:17.392+0100 writing Tetzi005.ProfileUser to dbbackup/dump/Tetzi005/xxxxxxx.bson
2016-03-09T16:51:17.392+0100 starting dump routine with id=2
2016-03-09T16:51:17.392+0100 writing Tetzi005.OrganizationDataSet to dbbackup/dump/Tetzi005/xxxxxxxx.bson
2016-03-09T16:51:17.392+0100 writing Tetzi005.DailyUserCount to dbbackup/dump/Tetzi005/xxxxxxxxxx.bson
2016-03-09T16:51:17.392+0100 writing Tetzi005.DailyEmailOrganization to dbbackup/dump/Tetzi005/xxxxxxxxxxxxx.bson
2016-03-09T16:51:17.392+0100 starting dump routine with id=5
2016-03-09T16:51:17.392+0100 writing Tetzi005.OrganizationStatistics to dbbackup/dump/Tetzi005/xxxxxxxxxxx.bson
2016-03-09T16:51:17.392+0100 writing Tetzi005.Organization to dbbackup/dump/Tetzi005/xxxx.bson
2016-03-09T16:51:17.398+0100 counted 112 documents in Tetzi005.xxxxxxxxxxxxx
2016-03-09T16:51:17.398+0100 counted 475 documents in Tetzi005.xxxxxxxx
2016-03-09T16:51:17.405+0100 Failed: error reading from db: EOF
グーグルで解決策がないFailed: error reading from db: EOF
この問題はlarge計画だけで発生します。技術的には、構成に違いはありません (メモリ、ディスク、および maxConns を期待してください)。Docker コンテナーで実行されているすべての mongo サーバー。Docker は、RHEL7 を使用する OpenStack VM で実行されます。
small Maximum 10 concurrent connections, 1GB storage, 256MB memory paid
medium Maximum 15 concurrent connections, 8GB storage, 1GB memory paid
large Maximum 25 concurrent connections, 16GB storage, 4GB memory paid