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

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MongoDB - DB/collection fragmentation level

I recently had a performance issue with one of my collections. On a whim (and thanks to this article), I decided to try compacting (as written in the official documentation). This worked brilliantly. ...
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keepalived: 2nd VRRP_Script never seems to run

I'm trying to implement keepalived on 3 mongodb boxes, the idea is that if mongod on one of the boxes goes down or we need to move the primary node to another system for some reason our application ...
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How exactly do I install MongoDB 2.4, instead of the latest version?

I've read the instructions on installing older versions but it appears that 2.4 is no longer available in the repos? aptitude -y install mongodb-org-server=2.4 Unable to find a version "2.4" for the ...
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183 views

connection issue between godaddy shared hosting and amazon ec2 mongodb

I have a site on godaddy shared hosting that is not able to connect to an windows 2k12 amazon ec2 instance running mongodb. Any ideas why I cannot connect? Thanks for your help! Error message: A ...
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Issues installing mongodb on centos 5

I'm trying to install mongodb for my centos 5.1 server via yum. I followed the instructions of creating a .repo file in the yum folder, but it still doesnt work. here's the screenshot of the issue: ...
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MongoDB Max Connections

we are using mongodb in our application for catching a lot of the data to reduce load from our main mysql database, for the last 2 3 days we are having an issue where the mongodb will hit the limit ...
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Expose a mongodb streaming data server that's behind a firewall, to the internet

I have streaming data on a Windows platform that I capture into Mongodb at fairly high rate of about 800 data points per second. I wish to have access to this data from outside the company, but the ...
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3k views

mongod service not starting

I've installed mongodb in Debian Squeeze using this guide (guide here) Installed successfully. It was running well until I restarted the machine (using command "reboot"); After restart, mongodb is ...
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800 views

Docker doesn't start MONGODB, and IPAddress doesn't appear, when started with other services

I have been trying to build an OS image from Fedora unsuccessfully to start the following: Systemd SSHD RabbitMQ MongoDB I can get the first 3 (Systemd, SSHD and RabbitMQ-Server) to work. I can ...
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63 views

Mongo Cluster - Unresponsive node/primary prevents creation of databases, secondary didn't take over

I have a Mongo cluster with a few shards each backed by replicasets with a primary, a secondary and an arbiter. Today one of the primaries became unresponsive. I logged into it directly and tried a ...
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496 views

RockMongo Connection Issue with MongoDB Slave

I have a MongoDB Replication with Master-Slave (not RepliSet) I have configured RockMongo on two servers. But I able to login to master server through rockmongo but when I login to slave with rock ...
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370 views

MongoDB copyDatabase failed with dbOwner

I have a remote mongo database in which I've setup a certain data base and a user with a dbOwner privileges. I can access to this db with this user info, but I can not copy this data using ...
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127 views

ENTRYPOINT & CMD commands with mongod results in unknown option error

I am using multiple Dockerfiles to setup my server infrastructure. One of the Dockerfiles I build is a MongoDB server which will be linked to a running web server application in a later step. ...
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740 views

mongod won't run without me specifying my own conf path

I recently upgraded my apt-get and now mongod isn't behaving correctly. I currently have to run via: mongod --dbpath /var/lib/mongodb and leave the terminal open for it to work. If I just run ...
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146 views

Do I need to run db.repairDatabase() on every mongod?

I'm handling a MongoDB (2.4.10) sharded cluster that has only 1 replica set till now. I ran db.repairDatabase() on a mongos. With that, I could reclaim free space on the primary node. But not on the ...
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620 views

Rename Mongo Shard

Can I, and if I can, how can I rename a shard in Mongo? Like if I wanted to change the instances of rs0 to rep0 below: mongos> sh.status() --- Sharding Status --- sharding version: { "_id" ...
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393 views

Backup Mongodb on EC2 through EBS snapshots - timing issue

I'm following this guidance http://docs.mongodb.org/ecosystem/tutorial/backup-and-restore-mongodb-on-amazon-ec2/ I have 4 EBS 1000 IOPS volumes assigned to instance These 4 volumes through MDADM ...
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349 views

Mongodump on Gridfs is killing the host IOs

I'm trying to make a mongodump from our production mongodb while the production is running. We have three production instances, one regular mongodb, one with very few gb of data on gridfs, one with a ...
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93 views

MongoDB Mergelist error in Debian 6.0.9

We installed Ubiquiti UniFi 2.4.6 which installs Mongodb 10gen on Debian Squeeze 6.0.9. This was a clean install, with no other packages installed from the base install (other than SSH). I was able ...
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179 views

Amazon OpsWorks - unable to reference ebs volume in mongo dbpath

I'm deploying mongo with Amazon OpsWorks as described in the Setting Up a MongoDB Replicaset With AWS OpsWorks and the instance fails to start when I specify mounted ebs volume (/data/ebs) in dbpath. ...
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7k views

how to connect to mongodb server via ssh tunnel

It was easy for me to connect to my remote mysql server on AWS using a sequelpro, however I'm struggling with doing the same thing with mongodb. I tried setting up an ssh tunnel via command line ...
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515 views

mongo as service error: Cannot determine state of server

I am trying to use mongodb as a service and started with heroku services ie dashboard.heroku.com/apps/scaleqamongo/resources. I tried multiple addons which they call like mongolab, mongohq. I create ...
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installing mongodb on 14.04

I was trying to install mongodb into a fairly clean Ubuntu 14.04. I used the following commands: sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10 echo 'deb ...
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157 views

Using Replication for Migration on MongoDB

I'm interesting in using replica set feature on Mongo as a method for smoothly migrating between machines. My Mongo database is currently a standalone instance. I realize the recommended practice is ...
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3k views

How to start Mongo daemon with auth support

I want to start the MongoDB daemon with auth support using the Mongo init script: sudo /etc/init.d/mongod start I have also added db users to the database to authenticate. I'm working with two ...
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126 views

Migrate standalone Mongo DBs to sharded/replicated cluster

Currently I have several independent standalone Mongo servers. I have Now set up a sharded and replicated Mongo cluster. I plan to copy over all databases from the standalone Mongo servers to the ...
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185 views

mongodb on aws 2 region replication

I think I already have the answer, but I'm a developer so thought I'd check here first. There are AWS regions with more than 2 zone, but some with only 2. E.g. Sydney. Now if I were to deploy a ...
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443 views

trying to install mongo but getting errors

I am following mongo site (http://docs.mongodb.org/manual/tutorial/install-mongodb-on-red-hat-centos-or-fedora-linux/ ) to install mongo on my centos 5.1o I am getting following errors sudo yum ...
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How to set ulimits for mongod?

How do I set ulimits for the mongod process/user on CentOS? I've read the official documentation but it doesn't provide OS-specific instructions. I need to set ulimit -u 64000 and need this to ...
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113 views

using cas server with mongodb backend

I 'm new to setting up cas(Central Authentication Service) server. I couldn't find any guides to setup mongodb as backend for CAS server. Is there an adapter to connect CAS and mongodb. BTW, we don't ...
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781 views

Installing multiple mongoDB versions on the same server

I have installed a 2.4 mongoDB version and I'd like to compare against the recently released 2.6 version. I want to know if possible to do a clean new install rather en an update to see if those two ...
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540 views

Incremental backup mongodb using rsync

I want to store small files (60 kb, couple of millions) into MongoDB, I was thinking using GridFS, but it seems BSON will do. Anyway, I want to make rsync to backup the mongodb chunk files, so ...
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141 views

Do I need to manually promote a replication node to Primary after a Primary node failure?

I have a basic 3 member MongoDB replication set. 1 x Primary 2 x Secondary A = Primary B = Secondary C = Secondary The Mongod service on the Primary stopped, and as expected, one of the Secondaries ...
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292 views

mongoose/mongodb DoS-ing a nodeJS instance [closed]

We have a nodeJS instance inside a AWS VPC that makes a request to a mongodb instance running in another availability zone. The node instance is hit with a particular request a lot. That request is ...
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253 views

MongoDB 100% locked periodically. MMS charts attached

Trying to diagnose what could be causing intermittent lock-up on MongoDB server running behind a Rails application. Hoping that someone might recognise the pattern of peaks and troughs in the charts ...
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275 views

Backup MongoDB database copying files in `dbpath`?

I need a daily backup of all MongoDB databases in our single-instance server (without stopping the MongoDB service). Our server is in Rackspace so I'm wondering if a valid strategy could be just add ...
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how to integrate between MONGODB & SOLR, using MONGO-CONNECTOR

Like this I started my mongod with replSet mod mongod --dbpath=/home/local/ASSYST-COC/so/mongo --replSet myrep --auth mongo started mongo -u root -p root --authenticationDatabase admin IN ...
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Apache fails to start after PHP upgrade on CentOS 6.5 x64

I have a developer server with CentOS 6.5 and PHP 5.5.11 (latest from REMI repos). Today I did: yum --enablerepo=remi,remi-php55 update That updated Apache and some other libraries like Mongo for ...
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643 views

Did my mongoDB server crash because the database is too large?

I've had no problems with my Mongo set up for a couple of years until it shutdown unexpectedly yesterday. I found no error in the logs from around the time it stopped. It seems like a neat ...
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323 views

iptables blocking local connection to mongodb

I have a VM (Ubuntu 12.04.4 LTS) with mongodb (2.0.4) that I want to restrict with iptables to only accepting SSH (in/out) and nothing else. This is how my setup script looks like to setup the rules: ...
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Copy mongodb collection between two servers AND different mongo versions …

I have a collection in a mongoDB, on a project that runs locally, and have to copy the collection to the dev server. Can you tell me how to do this, considering that: The local machine (the source) ...
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How to find/kill long running mongo scripts

I think I have a long running mongo script tanking my database, but I'm not sure. I was connected to the linux server via SSH and I ran the script like so: mongo my_database my_script.js It started ...
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MongoDB and ZFS bad performance: disk always busy with reads while doing only writes

I have huge performance issues using MongoDB (i believe it is mmapped DB) with ZFSonlinux. Our Mongodb is almost only writes. On replicas without ZFS, disk is completely busy for ~5s spikes, when app ...
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92 views

Strange Mongo DB writelock values in logfile

I'm getting some strange writelock values in my Mongo DB logfile: Wed Mar 19 10:03:47.007 [snapshotthread] cpu: elapsed:4010 writelock: 0% Wed Mar 19 10:03:51.007 [snapshotthread] cpu: elapsed:4000 ...
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mongodb cannot connect over network

Im trying to connect to a mongodb server over a network but I cant get the connection to work. I can connect like so on the local computer on which the server is running: mongo localhost:27027 But ...
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542 views

MongoDB Performance Troubleshooting

I have a small MongoDB replica set (2.4.6) and it seems about once a week, the primary gets bogged and the load average spikes up. This app doesn't see a huge amount of traffic. It resides in EC2 ...
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How do I accept two different types of network connections using iptables

I need to setup iptables for a mongodb database server, such that it allows only two types of INPUT connections: one connection to port 27017, monogdb's default port, from our main web-app one ssh ...
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276 views

MongoDB starting gets terminating

I am installing the mongodb with the default configurations, and that gets started normally, but when I changed the dbpath value to point to different position it started giving me the exceptions, can ...
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220 views

When does the replication from primary to secondary happen in mongodb?

I have setup a 3 node replica set. Writing to primary node works but when I read with readPreference=secondary; I get values as null. When I open the local node with robomongo I see that the ...
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245 views

mongodb 2.4.9 is crashing on wheezy when running as root

I installed mongodb-10gen v2.4.9 on a debian Wheezy, and I'm having this really weird behavior: if I run it as root I can't get it starts: root@xx:~# /etc/init.d/mongodb stop [ ok ] Stopping ...