MongoDB : Document-Oriented NoSQL Database

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Should I use SQL Azure to store product descriptions and links to images in Azure Blob

For an html/Css/JQuery public Azure website to be coded using Zurb Foundation html5 responsive framework, I'd like to use SQL Azure (web edition) to store product descriptions and links to images that ...
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114 views

automated data sync after Primary node is down

I have this scenario, using version 2.2.2: Node A, Primary, Priority: 10, Wireless network Node B, Secondary, Priority: 9, VM Server1 Node C, Secondary, Priority: 8, VM Server1 Sequence: In Node ...
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26 views

MongoDB index strategy

I'm developing a system to back-up computers and store the files / data with retention for a while. The actual files are stored in an object store, while I'm planning to keep the metadata of the files ...
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13 views

mongodb replicaset

I am adding a new member in ReplicaSet and it starts initial sync bur after certain point sync break and start resync again.this process continue and never complete its initial sync.so please resolve ...
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45 views

Error to connect mongos when trying to create replicated sharded cluster

I'm trying to create an replicated sharded cluster in mongodb. Initially I've created two shards and there are a replica set with three members in each shard. And all the shards and replicasets run in ...
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14 views

Checking records consistency after mongorestore --noobjcheck

I had an HDD malfunction on a Mongo node. After running fsck and mongod --repair I was able to dump the needed collection with mongodump and move it to another server. However, some records appear ...
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27 views

MongoDB Replica Set: Can't Add Member/Connect

I'm building a MongoDB replicaset w/ three Ubuntu 14 servers. I'm connected to the primary server and authenticated w/ userAdminAnyDatabase and clusterAdmin privileges. When I run ...
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21 views

In shard cluster, if 2 replica set nodes are offline leaving only 1 secondary..where do writes go?

This is probably a simple question that i can't get definitive answer too. If i have 10 shards, each being a 3 node replica set. If i loose 2 servers in a replica set causing the primary to change to ...
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55 views

Mongo not using enough RAM, and is slow

Our Production Mongo appears to be behaving weirdly. As far as I have read, Mongo should eat up all the available RAM to cache Index and Data in memory but in our case it is not doing so. Our ...
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16 views

Modeling for inclusion of two different entities

What I Have I am currently hashing out the data model for an application that will utilize MongoDB. In my setup, users or members (as they are called in the schema) will be created and then assigned ...
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61 views

Restore backup to staging replica set

I have a staging environment with Mongo replica set which I refresh on a regular basis. Refresh is done automatically using a bash script. Staging replica set consists of 3 members (primary, ...
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37 views

Error while changing the authentication - mongoDB

I had database level authentication in mongoDB, I had tried to change the password for existing user. It is throwing not authorized error. Steps i followed to change the password use wallet ...
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86 views

Best design of mongo replica set for DB read/write speed

I'm building a Node app that uses MongoDB. Whilst it would probably be fine to have node and mongo sitting on the same VPS, I want to ensure that the MongoDB is backed up and maintain high ...
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171 views

Error with Solr DataImporter using Mongodb

I've configured my environment and I've downloading Solr 4.7 The idea is make an indexing my mongodb database. For this I've installed the mongo-connector like appear here: ...
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40 views

mysql vs mongodb cache/load balancing

I have a system where users can 'like' content. There will likely be many hundreds of these likes going on at once. I'd like it to be AJAX driven so you get an immediate response. At the moment I ...
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166 views

MongoDB performance limits of mongo

There are 100 data files, each with 60 fields and over 4 million records. There is a perl program that inserts the records or updates them based on an userdefined _id field. There is also a History ...
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86 views

MongoDB secondary heartbeat hangs

We have got the same issue in two replica sets in AWS cloud. According to rs.status() on primary secondary jumping between SECONDARY and unhealthy states. With period of 10-20 seconds. In logs I see ...
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136 views

Store large hierarchy in NoSQL each day and compare

I'm in the process of creating a utility that stores a fairly large hierarchy into a NoSQL document. The data of this is similar to an Active Directory / LDAP structure which contains sub groupings, ...
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49 views

Add new shard - always best?

In our setup, we currently have 3 shard set sharded cluster, each shard being a replica set of 3. Our writes are about to go up significantly to implement a new feature, and we know the extra data ...
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5 views

Data Migration or Sharded Cluster to new Cluster

We have Sharded Mongo Cluster. However some documents are sharded and others are unsharded. We are planning to migrate these databases to new cluster. Please update if there is any process or steps ...
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5 views

MongoDB syncingTo change

I have a 3 members replica set version 2.6.1 with following configuration "_id" : 0, "host" : "10.125.16.22:30000", "priority" : 2 ...
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33 views
+100

MongoDB communication issues on Azure

I have a Python uWSGI app running behind Nginx using pymongo to communicate with a 4 machine replica set running Mongodb 2.6.3. The replica set is configured using domain names for each machine ...
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17 views

Failure dialing host after a time, skipping all tasks. Err: `no reachable servers`

I have been using MMS and there're 3 hosts based on Windows for monitoring. They're replica set with 1 primary and 2 secondary. Everything is OK for a long time. Recently, MMS has sent me too many ...
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15 views

Mongodb is taking up 7GB of hard drive space on VM, how do I fix?

I am running Debian on a VM. I installed mongodb and it is taking up A LOT of space. It is really slowing me down in college, with work and projects ... etc. I have a disk usage analyzer and I've ...
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10 views

Add a member in mongo db replica set

I Have Added A new Member in Replica set.And It Starts initial sync But After some point it will start resync again and again. And Log file show [rsSync] replSet initial sync pending Sat Jul 19 ...
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12 views

Disable MongoDB journaling?

Are there any benefits in disabling mongodb journaling besides performance gain? I know journaling provides write durability and crash resiliency. But I can tune syncdelay parameter to make data files ...
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18 views

mongodb master slave replication

I Have Setup master slave replication in mongo its working fine for few month then after that suddenly replication fails.I have started again with initial sync but during sync after a specific point ...
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16 views

How to confirm that chunk transfer is completed on a DB

I have one case where i create db for Daily data. I have some collections in this db which are sharded. My requirement is as follows: Create every day DB If There is a DB which is more than 7 days old ...
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13 views

Mongo - Fetch results sorted by the number of matching values in an array object

I have a mongo Database with collections such as : [{ _id : 'one', tags1 : ['A', 'B', 'C'], tags2 : ['D', 'E', 'F'] },{ _id : 'two', tags1 : ['A', 'Z'], tags2 : ['D', 'F', 'G', 'M'] } ...
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20 views

mongodb balancer does not move chunks because of obscure error

After carefully following this guide, on how to migrate a 3 member replica set to a shard containing 2 X 3 member replica sets, after sharding one of my collections nothing happened. Looking into the ...
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20 views

Searching larger documents

I'm currently developing an application where I want to use MongoDB for the main database. I'm trying to store the emails metadata inside the database. My schema: user_id (integer 32bit) -- index ...
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24 views

mongodb logRotate on windows server 2008

Running mongodb on a windows server 2008 R2 as a service in trying to do a logrotate for my mongod processes. I currently have a replica set 3 replicas. when i issue the command: (rotate.js) ...
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41 views

Collection VS lots of Fields

As of the moment we are having this collections RptCustomer RptCustomerMonthly RptCustomerDaily RptStoreCustomer RptStoreCustomerMonthly RptStroreCustomerDaily RptFranchise ...
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25 views

When enable authenticating in MongoDB, how to use mongo_fdw?

I test mongo_fdw these days, It's ok when mongodb disable the auth authenticate, but if the mongo enable the auth authenticate, should we create a mapping user for the foreign table? what shoud we ...
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112 views

Are mongodb bulk inserts really increase server perfomance (and faster)?

Bulk inserts always are faster in client side because of saving round-trips, but at the server-side is there any sensible performance improve? It seems the code for bulk inserts, just loops over ...
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162 views

Mongodb: Waited too long for lock balancer to unlock

Mongo Version: 2.4.5 OS: Windows Server 2008 R2 Standard (Service Pack 1) We have a balancer idling for a day doing nothing (no recent records in changelog), holding a lock state 2. Tried to stop ...
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23 views

How to restore MongoDB production replicas from underlaying files of hidden replicas in case of human error?

When I have backed up files of my hidden replicas, how can I use it in case of human error (e.g. drop db, etc)? I mean, what I have to do to restore data from it? I probably should: stop balancer, ...
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186 views

Storing files in Mongo's GridFS vs File System

I read the question here: http://programmers.stackexchange.com/questions/150669/is-it-a-bad-practice-to-store-large-files-10-mb-in-a-database and this paper: ...
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94 views

MongoDB Sharding and Replica Set Allocation

I am going to setup MongoDB cluster: 3 config servers, 3 routing servers, 2 shards (replica set per shard). A replica set is just simply 1 primary, 1 secondary and 1 arbiter. Therefore, in my ...
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117 views

MongoDB - Assertion failure error

I am using a replica set with three 2.4.4 mongod instances, and today the primary crashed. This happened several times, and I used repair command to repair the database each time. I think this error ...
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205 views

Mongodb replica set : “errmsg” : “initial sync need a member to be primary or secondary to do our initial sync”,

I started primary and two secondary (which were previously running in master-slave config) in replica set on three machines with following commands mongod --replSet rs0 Then connected on one of ...
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35 views

About transactions on mongodb

To what extent the atomic storage of mongodb can leave your database unsafe of inserts or updates on my data? In the other words. What are the possibilities of my data not been (inserted or updated) ...
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20 views

MongoDB fall into a forever waiting after a long time insert

I have a mongodb cluster,I have a very large size of data to insert to it .But it's a pitty that the insert operation seems to fall into a pause after a day's insert operation.I tried to connect to ...
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61 views

Issue while restarting - mongdb

I had tried to start the mongodb service using the following command in linux machine. service mongod restart I am getting the following error Stopping mongod: ...
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59 views

show database command doesn't show databases

I've made the following configuration options logpath=D:\mongodb\log\mongo.log logappend=true dbpath=D:\data\db directoryperdb=true port=64623 # [mo]ngodb maxConns=100 objcheck=true cpu=true # ...
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61 views

Mongoose: Using limit operator with subdocs match a condition

I have a Schema like this in Mongoose: var Schema = require('mongoose').Schema; var ActivitySchema = new Schema({ is_hidden : { type: Boolean, required: true, default: false }, post : ...
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15 views

Updating Document in MongoDB without Alphabetically order

I am making one project on MongoDB and inserted some documents and now i am updating the documents by this code.. bson_init( query ); bson_append_string(query, "First", "A"); ...
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20 views

Overwriting Files in MongoDB GridFS using C Driver

I am new to mongodb and read about the GridFS for storing Files but when i am storing Files in GridFS, I am facing two problems 1) When I am writing a file into GridFS using C Driver, havinge same ...
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73 views

Mongodb bson Query using C driver

I am doing a project in which i am saving BSON documents in a collection in the mongoDB server using C Driver. I am saving the collections like this bson_init( b ); bson_append_new_oid(b,"_id"); ...
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27 views

how to start sharding in mongodb

I am trying to learn sharding in MongoDb and here is my plan: I'm trying to shard the database S001 into 2 different machines. 192.xx.xx.60>mongod -configsvr --dbpath S001 ..Now running in ...