MongoDB is a document oriented database (also known as NoSQL database).

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MongoDB - Tie user to specific replica set node

Is there a way in MongoDB 3.0 to allow users access to only a single replica set node? We have a lot more data on disk than we do memory. So to keep our production support from paging into memory ...
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8 views

mongodb replica set Error [on hold]

After configured mongodb with keyfile, application try to access mongodb files. It throws below errors. (authentication.js:68) ensureIndex: MongoError: not authorized for query on ...
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4 views

varnish - little delay after 5 seconds

I installed varnish on a hello world application, along with nginx, hhvm and mongodb. The only things that bugges me is that the first time when I access the url I get around 125 ms response time and ...
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7 views

Slow mongodb on ruby on rails

I have a ruby on rails application with mysql and mongodb (mongoid framework) running. I tested a load test with siege with the setting -c 60 -r 10 on one page which have 2 stationsong find queries. ...
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1answer
18 views

Permission denied to connect Mongodb with PHP on EC2

I can't connect to the remote EC2 server with PHP because I got permission denied. However I could connect remotely by command line from the same server so it seems the firewall settings are fine and ...
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24 views

exception in initAndListen: 28595 2: No such file or directory, terminating

after server crashed, mongod service don't start. OS: Windows Server 2008 R2 start mongo version: 3.0.0 repair option don't help, journal directory is empty after crash update mongo to 3.0.2, this is ...
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18 views

Low end vps at 90% RAM usage due to mysql [duplicate]

I am running a low end vps (512mb ram) 1 cpu with ubuntu 14 32bit. I am also running mysql for my user data and its taking up 50% memory resources making my ram run at 90%. I already tried to ...
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21 views

MongoDB Oplog Security

We are using a MongoDB replica set for sharing sessions and other (potentially sensitive) data in a web farm. All the data we store uses TTL indexes to expire documents after a relatively short ...
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1answer
62 views

Chef: mongodb::user_management failing in aws opsworks with “NameError: uninitialized constant Mongo::MongoClient”

I have been using the mongodb cookbook successfully to create user accounts for months but recently something has changed and I can't figure out what it is. The default recipe completes without ...
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8 views

Service Busy Alarms on USSD GW due to MongoDB [migrated]

We are getting service busy alarms on my machines which are using MongoDB. When the service busy alarm appears, we get the following errors on our Mongo router logs. The OS on these machines is ...
2
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1answer
49 views

mongod: symbol lookup error: mongod: undefined symbol: _ZN5boost6detail13once_epoch_cvE

Iam having trouble with my mongodb install : when I run sudo mongod, I get mongod: symbol lookup error: mongod: undefined symbol: _ZN5boost6detail13once_epoch_cvE uname -a Linux xyz 3.2.0-4-686-pae ...
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10 views

Connecting more, then 7 instances 13612 Error

Presently i'm working with AWS Opsworks to deploy mongodb cluster. I'm using https://github.com/netinlet/chef-mongodb_replicaset repository to deploy. Unfortunately when i'm trying to connect more ...
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1answer
510 views

Why can't i install mongodb 3.0 on Ubuntu 14.04 32bit?

I have followed all the official istructions listed here: official page In detail, i have done: sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10 (seems ok) echo "deb ...
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1answer
25 views

creating snapshot for mongodb

I am trying to create snapshot for mongodb on centos 6.6. root@ ~]# lvscan File descriptor 12 (pipe:[23409]) leaked on lvscan invocation. Parent PID 3579: /bin/bash File descriptor 13 ...
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8 views

Error: no open connections at Db._executeQueryCommand

I have a node application used with express framework. This application runs smoothly. But suddenly, after some point of time, it starts to give error as "Error: no open connections at ...
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46 views

Expanding HAProxy health check to monitor MongoDB primary and secondary state

Follow up question regarding the MongoDB health check with HAProxy How to construct a MongoDB Health Check in HAProxy? The current solution works well when the focus is on determining if mongo ...
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78 views

'mongod wiredTiger' on Ubuntu?

I cannot use wiredTiger as a service for MongoDB. Then, I progresses step by step according to the following guide; http://docs.mongodb.org/manual/release-notes/3.0-upgrade/ Step-1: Start 3.0 ...
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1answer
29 views

How can I configure an Azure VM to securely host Mongo for connection to a web role [closed]

I would like to run Mongo DB in Azure. I looked into the hosted version, but the price is high, so I'd like to run my own MongoDB for use with an Azure Web Role. I would like the Mongo DB to remain ...
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25 views

Mongodb + Kerberos BadValue SASL mechanism GSSAPI is not supported

I am trying to run an instance of mongodb with the authentication mechanism GSS-API. This is the command: mongod --dbpath /home/ec2-user/db/node2/data --auth --setParameter ...
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1answer
43 views

EBS vs Instance Local storage for MongoDB in ec2

Cassandra recommends using instance local storage for EC2 deployments instead of EBS I am deploying MongoDB in EC2... should I also be using instance local storage instead of EBS PIOPS?
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24 views

MongoDB cluster network Resilience with 2 ethernet only

I wonder if it is possible to configure a network resilience mongodb cluster using only 2 ethernet adapter card on each node. I configured the cluster with 3 nic emulating the third nic using vip ...
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33 views

Slow insert speed to Mongodb utilizing Mongoid ORM

I have a production platform utilizing Sidekiq, Mongoid and a replica set (3 nodes). This has been operational for about 6 months and running very smoothly. All jobs were processing in usually less ...
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1answer
16 views

EC2 Linux mapping between file system and EBS volumes

Where are "observable" paths like /home/ubuntu/foo.txt stored on a Linux EC2 instance with mounted EBS? I have a basic EC2 instance with added EBS storage, mounted as /mnt/my-data following one of ...
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154 views

How to display MongoDB stats in Graphite?

After googling for 2 days with no solution I would like to know if anyone uses Graphite with either CollectD or StatsD to include MongoDB statistics in a dashboard. I was hoping for an up-to-date ...
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1answer
885 views

getting mongodb running locally on OSX Yosemite [closed]

I've installed mongodb using homebrew, but mongod will not run. I'm getting this error: 2015-03-09T14:47:22.418+0000 I CONTROL [initandlisten] MongoDB starting : pid=10510 port=27017 ...
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1answer
60 views

Is it generally a bad idea to run MongoDB and ElasticSerach on the same nodes

Simple question: is it stupid to run mongodb and elasticsearch on the same nodes within a cluster of three if you take care of mongodb's memory hunger using cgroups and ignore the aspect of concurring ...
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44 views

Using database for storing text files and images [closed]

I need to build a image/static file cache which would host maybe few hundred up to thousand static files from 1kb to ~200kb. I'd need super fast reads (I'm using redis, but it's one threaded and I'm ...
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42 views

Best practice of using MongoDB Replica Set on AWS EC2

MongoDB needs at least three replica set members on independent locations to work automatic failover correctly. However, some of AWS Regions (such as ap-northeast-1) have only two Availability Zones. ...
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32 views

MongoDB mongos memory usage

Planning how to deploy a shard-ready cluster (Single shard at the moment, with all config servers and mongos processes), I've read the MongoDB operations best practices. I have doubts about the memory ...
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2answers
61 views

Building Mongodb 3.0.0 with SSL

I am trying to build Mongodb 3.0.0-rc8 (tried latest nightly too) with ssl support. I found a gist which works for 2.6.7 but when I run it with 3.0.0-rc8 I get that eror ...
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90 views

mongoDB servers are not available when the master is down

I got the following errors when the master replica is down ConnectionPool::PoolShuttingDownError (ConnectionPool::PoolShuttingDownError): Moped::Errors::ConnectionFailure (Could not connect to a ...
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109 views

mongodb authentication not working in puppet

I used the same connectionstring in the terminal and it's working ok. But from Ruby I get error output when vagrant provision runs mongo admin -u 'vaga' -p 'vaga' --authenticationDatabase admin ...
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2answers
89 views

restore mongoDB databases from manual backup (not used mongodump): strange permission problems

Is it possible to restore databases which were manually copied from /var/lib/mongodb to eg. /home/foo/mongobackup ? I am not sure if the backup was made after stopping the mongod service. Either way, ...
3
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1answer
54 views

How can I decrypt ssl encrypted mongo wire protocol for inspection when I have ownership of all certificates involved?

I have a standard MongoDB SSL environment where the mongo wire protocol is encrypted with SSL/TLS using RSA keys. I have packet captures of communication between the MongoDB server and a client taken ...
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1answer
53 views

Change mongo data directory for a specific database

Is it possible to change the data directory for a specific database in mongo? I'm optimizing a particular database for speed and I would like to move it to an SSD drive. The drive is not large enough ...
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15 views

Database groups in mongodb

I'm facing a problem (well, not a real problem, more of a detail) in deploying an infrastructure for several applications. Some of them use PostgreSQL and some of them MongoDB. I would like to run ...
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39 views

MongoDB hogging IO but it doesn't show in mongotop or mongostat

Iotop says mongod is using a lot of IO (96.32%) for a long while but mongotop and mongostat show a bunch of zeros. How can I better monitor mongodb and find out what's happening?
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1answer
56 views

Is my default File System ext4

By running df -hT that shows mounted file systems, how can I know if my default FS is ext4? Also as mentioned by one of the MongoDB engineers in this video (@1:13) from M202: MONGODB ADVANCED ...
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1answer
59 views

VMware Grails application on one VM can't access MongoDB on another VM

I have two VMs in a VMware cloud that belong to the same VApp and so are behind the same edge gateway. The both have their own different internal ip addresses but I route services from the outside to ...
1
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1answer
95 views

Linux fixed file size copy from Windows Server 2012 NFS share

Company is in the process of switching from hosting MongoDB on windows server 2012 to hosting on linux(ubuntu 14.04) Current backup and restore strategy involves copying all the data files via ...
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1answer
130 views

MongoDB: insert operation fails but disk is free

I've seen the strange behavior of my server and first of all I looked at log file /var/log/mongodb/mongodb.log. There I saw the next lines: Wed Jan 7 16:33:31 [FileAllocator] allocating new datafile ...
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1answer
325 views

Starting mongoDB server fails

I just installed mongodb server on my ubuntu using this command: sudo apt-get install mongodb-server But I can't start it. When I try to run the server, it says: masious@ubuntu:/var/log/mongodb$ ...
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1answer
99 views

Fluentd not writing apache access log to mongodb

I'm following the instructions from this link to write apache access logs to mongo db- http://docs.fluentd.org/articles/apache-to-mongodb. But nothing is getting written to mongo DB. I'm checking ...
0
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1answer
57 views

mongo shard has high number of faults, but top shows only 8% of memory used by mongod

I am investigating some performance issues in my mongo setup. I have 3 query controllers and 6 shards. I'm doing a large batch import/update, and on the 3 query controllers, I'm getting around 200 ...
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1answer
114 views

Can i delete oplog local.* of Mongo backup fsyncLock() + LVM snapshot?

Is it safe to delete oplog local.* files from a MongoDB snapshot ? Does the fsyncLock() commit oplog entries in DB files ? I currently do a fsyncLock() + LVM snapshot of Mongo data. Then i mount the ...
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1answer
53 views

How to use fsyncLock() safely in backing up a single mongod

I read in MongoDB's official documentation: important: db.fsyncLock() may block reads, including those necessary to verify authentication warning: When calling db.fsyncLock(), ensure that the ...
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1answer
43 views

Mongo query takes 76 seconds in production but not using Mongo shell

I have a query: db.content.find({ "$or" : [ { "cik" : "0000764839"} , { "entitiesDetected.ids" : "ZqH9BvtitcYR88NKC"}], "pubDate" : { "$gt" : { "$date" : -2206281600000}}, "orderBy": {"pubDate": -1, ...
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89 views

adding mongodb authentication breaks connecting via nodejs

I needed to have external access to my mongodb database, so I have removed the bind_ip from the mongod.conf file, and turned on auth. I then added a root user that can access everything, and tried to ...
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2answers
559 views

Readahead for /var/lib/mongo is set to 4096KB

I'm trying to set the readahead for mongo 256 or less as recommended, I looked at the documentation for any guidance and I found this: Ensure that readahead settings for the block devices that store ...
1
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1answer
106 views

mongorestore with indexing in foreground

I need to restore huge dump taken with mongodump utility. As the collections are big and mongorestore rebuilds indexes in backround, index building takes very long to finish. What I want is to somehow ...