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

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mongo and app server cpu

The beginning: We are using uwsgi and I decided to switch our configuration to use more workers/processes. Why: We have been seeing a traffic increase lately and in my tests with apache benchmark, ...
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126 views

mongodb keep looping while trying to sync data

I'm converting my my standalone mongodb into a replica set. I've added one more member (and I want to add two more members later, and to shutdown the primary server). My primary mongodb is running ...
2
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134 views

Recovering data from MongoDB raw files

We use mongodb for our database and set the replset(two servers), but we mistakenly deleted some raw files that under /path/to/dbdata on both servers. After that, we used extundelete to get back the ...
2
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1answer
205 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 ...
2
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1answer
189 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 ...
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232 views

LVM+MongoDB. Dropping in speed of backup creation

Till recent time we have been making mongo backups archiving LVM snapshot on hidden SECONDARY server with RAID10 on SAS disks. Currently operation on making snapshot from volume with 500 Gb of data ...
2
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1answer
3k views

High CPU usage on mongodb server when idle?

I am getting strange usage numbers on MongoDB server when it is in almost idle state: http://pastebin.com/cKVyGMts (no queries) DB size is about 3.3 Gb I can see in mongodb.log that snapshotthread is ...
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46 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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26 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
205 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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80 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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1answer
95 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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240 views

Mongodump segmentation fault when dumping all dbs

I'm running a mongodb(2.0.4) replicaset with one master and two slaves where one is hidden slave for backup. I'm using http://docs.mongodb.org/manual/core/replica-set-architecture-three-members/ When ...
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1answer
85 views

MongoDB Balancer

So I have 2 sharded clusters with 3 servers each.My mongos is running, my config server is running and ive also added test data to 1 of the 2 shard clusters. I am having trouble getting that data to ...
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1answer
106 views

MongoDB cloneCollection between Azure hosted CentOS servers times out at 2 hours

I'm trying to clone a MongoDB collection from CentOS server A to CentOS server B. Both are running 2.4.6. The copy works great until exaxctly 2 hours, at which point I get a 9001 socket exception: ...
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1answer
30 views

Query related to production environment

I have configured my production environment with the following details: 1. Three config server 2. Two routers (`mongos`) 3. Two shards of three node replica sets. My question is: I am trying to ...
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1answer
99 views

Nginx PHP Consistently Slower than Apache 2.2

NOTE: I asked this first on StackOverflow and was sent here. I hope the repetition is OK. In doing load testing comparing Apache 2.2 and Nginx 1.2.6 running using fully stock packages on Ubuntu ...
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1answer
334 views

Quickest/best way to copy a portion of a large mongo database to another server?

I have a dataset of 100m tweets stored in Mongo, unoptimized and unindexed. I need to copy all tweets from the last month onto another server, what is the best way to do this? My idea was to use a ...
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596 views

Very slow MongoDB replica set

I have set up two Mongo instances in EC2 having RAID10. I set up replica set using those two servers and found that this replica is very very slow over network. If I log in locally and issue query ...
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1answer
1k views

Can't setup 3 nodes MongoDB recplica set

I just follow instructions in MongoDB document Replica Sets - Basics to setup a 3-node Replica set. Everything goes fine when I do the initiate and add first node in the primary. [foo@host-a ...
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1answer
234 views

MongoDB cluster reporting gotShardHost errors

We're running a MongoDB cluster up on EC2 and are experiencing the following error over and over again in our log files: Assertion: 10429:setShardVersion failed! { "errmsg" : "exception: ...
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1answer
253 views

My ubuntu server can ping and ssh can connect, but ssh can't do the authuncation and halt

I have two ubuntu server. Each running php-cgi by phpfpm, memcached, mongodb. And these servers are not running in a high load state. After running several days. The server will halt. No service and ...
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276 views

MongoDB Java, R2.5.3 - NoSuchMethodError on DBCollection.save(DBObject) in Tomcat6

java.lang.NoSuchMethodError: com.mongodb.DBCollection.save(Lcom/mongodb/DBObject;)V Here is the sample code. Error is on Line 3. 1 BasicDBObject dbo=new BasicDBObject(data); 2 DBCollection coll ...
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35 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 ...
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371 views

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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36 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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43 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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26 views

Merge 7 node mongodb (2.4) cluster into one standalone mongo shard

I'm running a 7 node mongodb sharded cluster (version 2.4...). I would like to merge this into a standalone shard with 7 times the disk-space. I've tried to create the single shard instance and ...
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194 views

MongoDB high CPU usage

Running MongoDB 2.4.11 on Ubuntu 14.04.1 LTS In top, this mongod thread is constantly using ~195% CPU: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 24524 mongodb 20 ...
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89 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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143 views

Can't load Mongo extension in php.ini

I'm having some issues while try to load mongo.so extension at php.ini. Below is what I tried: Compile the mongo extension by following the documentation at php.net for MongoDB site. This resumed ...
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902 views

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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400 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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300 views

Why mongo pecl module looses its connection after Primary stepDown?

I run an Apache 2.2.22-13 with pecl module "mongo 1.4.4". It connects to a MongoDB 2.4.6 sharded cluster. When a stepDown occurs, the mongo module seems to stay on the mongod node which was the ...
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14 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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15 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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30 views

Add security/authentication to mongodb (2.6) without downtime?

We have a 3 node replica set (running 2.6.1) that's running mostly defaults. We'd like to add authentication, but do it without downtime. I'm fine with restarting the nodes one-by-one and even ...
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26 views

How remove a collection from a database without a running Mongo instance?

Is it possible to remove a collection from a database without a running Mongo instance? I ask because I cannot start Mongod due to an exception being thrown ("no NamespaceDetails for index"). The ...
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338 views

AWS Linux yum repository can't find MongoDB packages for install

I am trying to install the latest version of MongoDB for my 32-bit AWS Linux instance. I am following these instructions from the MongoDB documentation. I have created the .repo file in the proper ...
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37 views

Setting up MEAN stack on cloud server

I'm working in a company that has been developing websites with PHP and thus we have been using a Rackspace cloud server to host our files. I want to bring us forward in time and try to develop our ...
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70 views

Linked Server in SSMS: role of “String Column Lengths” values

I'm using linked server in SQL Server Management Studio in order to connect to Mongo database through ODBC. I have hard time trying to get data from Mongo. Here is a query I try to make: Select * ...
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90 views

Replicated MongoDB server slower than simple shards

I tried to compare the performance of a sharded configuration against a sharded and replicated configuration. The sharded configuration consists of 8 shards each running on three different machines ...
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154 views

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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117 views

MongoDB Sharding Issue

I made some Sharding tests but I always got the same issue. I got 1 config server, 3 shards (mongod) on 3 different servers (500 Go each). When I made an insertion of huge amount of data (1 000 000 ...
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46 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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357 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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198 views

mongodb replication with admin authentication

I have three nodes of mongodb replication set 2 servers have the data and the third is an arbiter 54.83.20.44 : 27017 (primary) 54.197.243.55 : 40000 (secondary) 23.21.148.73 : ...
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171 views

Puppet MongoDb enabling authentication and defining password

I'm working on enabling authentication using the puppetlabs mongodb module. As the docs say, to enable authentication, I should add auth => true. But in order for authentication to work, I have to ...
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26 views

MySQL version of MongoDB Replica. OR MySQL MongoDB Driver

Not sure if this is the right stack exchange site for this question so if it is can you please advise which one would be best. Is there any way to either: A)Have MySQL run via a dedicated driver / ...
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331 views

CentOS 6 - Mongodb - Invalid access at address xxxx from thread: initandlisten

For starts I looked everywhere online for this, a lot of people have the problem, no one has a working solution. I've installed mongodb using yum and their instructions provided at ...