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

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623 views

How to calculate the required EBS PIOPS for our mongo server?

We want to use provisioned IOPS EBS volume on our mongo machines, I'm a bit confused on how to calculate the number of provisioned IOPS to use. Currently we're getting an average of 25 IOPS (read + ...
0
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1answer
413 views

Cannot install in mongodb in ubuntu 13.04

I follow the instruction provided by mongodb. But seems package mongodb-10gen isn't existed. vagrant@m1:~$ sudo apt-get install -y mongodb-10gen Reading package lists... Done Building dependency ...
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1answer
98 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 ...
0
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1answer
137 views

Spawning mongod process using sudo yields two separate mongod processes

I am seeing something weird that I can not figure out: If i run the following command sudo mongod --dbpath /db/database/ --logpath /db/logs/mongodb/mongodb.log & and then do a ps aux I see ...
0
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1answer
40 views

Login authentication vanished from MongoDB install

A few months ago I enabled password protection on my MongoDB install. Today I ran the Mongo client and forgot to use my login details. Instead of rejecting nearly everything I try to do from the ...
2
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1answer
826 views

So how does one use rockmongo to connect to a mongo sharded setup with replicasets?

I try to use rockmongo, to connect to our cluster. Our setup is a setup of two shards each consisting of a replicaset. I try to connect to the mongos instance and while rockmongo connects I get an ...
1
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1answer
350 views

Changing MongoDB Oplog size

while loading data to mongodb, I keep getting "error RS102 too stale to catch up"... After research I found that my default oplog size for a 32 bit linux machine is too small. I would like it to be ...
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1answer
48 views

Is this normal or due to bug in mongodb?

I am new to mongodb and i installed it on xen para virtual vm and when given command "mongo" terminal freezed and on the top output command mongo is taking almost 100% CPU. Is this a bug,or does ...
0
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1answer
288 views

How would I template an SLS using saltstack

I'm trying to do proof of concept with Mongodb(sharding) and Id like to run a command every time I spin up a new cluster without having to add lines in all my sls files. My current init is as follows: ...
0
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1answer
1k views

Wrong php_sufix config variable in MAMP [closed]

I've just installed MAMP and I'm trying to install the Mongo extension via pecl but I'm getting an error: jonesy:bin Billy$ sudo pecl install mongo downloading mongo-1.4.4.tgz ... Starting to ...
0
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1answer
203 views

Large, high performance object or key/value store for HTTP serving on Linux

I have a service that serves images to end users at a very high rate using plain HTTP. The images vary between 4 and 64kbytes, and there are 1.300.000.000 of them in total. The dataset is about 30TiB ...
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0answers
442 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 ...
4
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1answer
3k views

MongoDB virtual memory usage

I'm testing MongoDB for archives data. We have a collection with 160M rows. MongoDB instance takes 76.2 Gb virtual memory on a 12 Gb physical memory box ;-) The swap in null. I read that virtual ...
1
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1answer
112 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: ...
9
votes
2answers
20k views

/etc/security/limits.conf soft nproc limit appears to be ignored

My MongoDB database was running into problems under load, with the following errors spamming the logs: [initandlisten] pthread_create failed: errno:11 Resource temporarily unavailable [initandlisten] ...
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2answers
367 views

Multiple Amazon EC2 With Load Balancing And MongoDB

I have an Amazon EC2 server where we run a webapp and MongoDB. We want add a second EC2 server and a Load Balancing to the same region. Load Balancing will redirect all web requests (80 and 443) to ...
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2answers
1k views

MongoDB on EC2 - Could not stat /dev/xdf — No such file or directory

I'm following a tutorial for setting up MongoDB on EC2 and I got stuck at the following part: $ sudo mkfs.ext4 /dev/xdf mke2fs 1.42.3 (14-May-2012) Could not stat /dev/xdf --- No such file or ...
2
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1answer
111 views

MongoDB Sharding Config and MongoS Storage

In doing this year's budgeting, I need to estimate the capacity needs for next year. We are planning on needing to shard our MongoDB Replica Set out to 4-shards, but I have the disk capacity needs ...
6
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2answers
3k views

what does locked % in mongostat mean?

When running mongostat to look at our mongo database, I'll frequently see the locked % number jump up, sometimes as high as 80%. Here's a few example rows: insert query update delete getmore ...
0
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1answer
156 views

What's special in restoring a DB in a MongoDB sharded cluster?

I'd like to migrate a DB from a replica set to another which belongs to a sharded cluster. Till now, this cluster has got only 1 shard, and no collection or database is really sharded. I mongodumped ...
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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
521 views

Very high disk IO on Mongodb Config servers

Perhaps someone could tell me if this is expected or not (It doesn't seem normal to me)... On all 3 of my config servers I am seeing consistent high disk IO, even when the sharded-cluster has ...
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1answer
34 views

Mongodb spamming log

I found that mongod writes [snapshotthread] cpu: elapsed:4000 writelock: 0% continuously. So it one day log now about 2Mb. What does it mean and how to disable this?
2
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1answer
1k views

Can I use MongoDB with Amazon EC2 small instance?

I want to move my MongoDB from a virtual server to amazon web services. I know MongoDB provides a preconfigured AMI, with three provisioned EBS volumes. But this is only available for m1.large ...
2
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1answer
601 views

MongoDB getting OOM killed

we are running a mongodb replicaset on three machines. All three machines have around 16GB but only 255MB Swap. Swappiness is left on it's default value 60. The machines are running CentOS 6.4. The ...
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3answers
170 views

How to choose NoSQL database engine?

We have a database with following specs: 30k records, 7mb in size 20 inserts/second 1000 updates/second 1000 range selects/second, by secondary index, approx 10 rows each needs at least one ...
0
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1answer
171 views

How could I avoid having 90 CPU Load only by pressing F5 on my browser?

I have a php website and If I press on F5 on my browser I get this CPU load : $ w 11:34:54 up 16 days, 1 min, 5 users, load average: 90,81, 32,02, 12,57 It come from every pages on my website ! ...
0
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1answer
551 views

server load too high on mongodb server

I have a mongo server on ec2 and its storing some collection which is having 12+ millions documents. Their are 7 other instances trying to fetch some documents from the mongo server. Also their are ...
0
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1answer
420 views

How good is this MongoDB/EC2 setup? [duplicate]

Hi, I wondered what was a good setup for AWS/MongoDB in terms of machines and the sizes of their disks. Current setup 3 micro machines for the config servers, 1 mongos and arbiters. The 8Gb limit ...
0
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1answer
291 views

Failure to connect to MongoDB - couldn't connect to server

I am using a reverse-ssh tunnel to make a DB behind firewall available from remote machine. But here is the intriguing part: From AWS server with ssh tunnel to DB behind firewall: connecting to IP ...
0
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1answer
1k views

How to install mongodb on SUSE Linux Enterprise Server 10 (x86_64)

I download mongodb for distrubution SUSE Linux Enterprise . . I downloaded mongodb from link http://downloads.10gen.com/linux/mongodb-linux-x86_64-subscription-suse11-2.4.5.tgz and extract it to ...
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1answer
318 views

ec2-consistent-snapshot mongodb - mongod.lock file

I'm trying out ec2-consistent-snapshot with --mongo --freeze-filesystem options. The snapshot itself works great. However, after I restore the volume and try to use it with a new instance, when I ...
0
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2answers
768 views

Setting up MongoDB for multi-db authentication

I have a MongoDB that has the regular authentication setup so you need a username and password to connect to the database (auth=true in the configs). The problem I'm running in to is that I have some ...
1
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1answer
119 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 ...
0
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1answer
270 views

How to configure a MongoDB configsvr and arbiter on same instance?

I am setting up an arbiter onto the same machine as a config server, but having some trouble with the default 10gen /etc/init.d/mongod file. I tried creating an additional /etc/init.d/mongod-arb for ...
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1answer
1k views

mongorestore from stdin

On a remote server I have a file which is the mongodump output compressed, let me say a file called mongodb.tar.gz. Inside mongodb.tar.gz there is a directory structure like this: dump/dbname/ ...
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1answer
290 views

10gen mms monitoring service to start after reboot [duplicate]

I have setup MMS agent for my mongoD instances on AWS. MMS Agent is on a separate t1.micro instance. It all works fine however, every time I reboot the server I have to run sudo nohup python agent.py ...
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1answer
168 views

Re-mount EBS vol on EC2 instance

I am new to sysadmin. I am trying to launch a EBS-backed EC2 instance. I did the following based on mongodb docs: sudo mdadm --verbose --create /dev/md0 --level=10 --chunk=256 --raid-devices=1 ...
4
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2answers
627 views

How to change the master in a MongoDB cluster without restarting the process?

Reading the documentation of MongoDB about how to configure a master-slave configuration of a cluster (our cluster will have more than 12 nodes, so unfortunately we can't have a replica-set ...
0
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1answer
172 views

Mongodb over Lustre?

I need to install a mongodb instance with a lot of data storage. We have a Lustre FS with hundreds of terabytes, but when monogdb start show me this error: Mon Jul 15 12:06:50.898 [initandlisten] ...
5
votes
1answer
493 views

How can I filter MongoDB Replica Set Heartbeats with tcpdump?

Occasionally, when troubleshooting the health of a replica set, I'd like to filter out the heartbeat packets specifically, track them going out, and the subsequent reply (or lack thereof) without all ...
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4answers
1k views

Restarting MongoDB automatically if it crashes

I am running MongoDB on an Ubuntu server. It's using an upstart script to start mongod when the machine boots. I noticed that if the process crashes, it doesn't get restarted. How can I make sure ...
0
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2answers
381 views

Should I disable turn off MongoDB profiler in production machine?

The default according to [1] is collect profile data when execution time > 100ms But one of the issue is when majority of queries' execution time > 100ms, our system start to overload and I am not ...
2
votes
1answer
288 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 ...
0
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1answer
155 views

Deb 6: Can't install Mongodb 64; uname -m and arch both return x86_64

As the title suggests, in bash the commands uname -m and arch both return x86_64, suggesting to me that I'm on a 64bit OS and processor. But, when I use aptitude or apt-get to install the package ...
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2answers
189 views

With 3 production nodes, why Mongodb complains about even voting nodes?

I run a mongodb sharded cluster with 1 shard, 1 replica set (2 secondaries, 1 primary, 1 delayed slave). Frequently, the following message appears in the logs: [rsMgr] replSet total number of votes ...
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2answers
654 views

Problems with running a node.js application using mongoDB on a VPS running CentOS

I have registered a VPS with DirectAdmin, running CentOS and I'm using a domain which I registered from a different site. I've done the necessary configuration to make the domain display the default ...
0
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1answer
25 views

How do you deny a user access to a certain collection in mongo?

I have several collections that I would not like certain users to see. How would I go about "hiding" them or blocking a user from viewing?
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1answer
459 views

MongoDB is not using all of my system memory for working set?

My machine has 42GB RAM, and the total index size is 40GB (working set should be 100% filled as the indexes are all on UUID columns). I suspect my working set is too large as the page fault started ...
2
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2answers
312 views

Cannot Restart MongoDB 2.4.3 on Debian 6.0.7 (32-bit)

I installed MongoDB on a Debian VM using apt-get from the 10gen repository. Some time after the install, I wanted to enable authentication in the configuration file, but when I ran service mongodb ...