Questions tagged [nosql]

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Best way to store database file on a NAS and run the server on a computer

I have a txt file more than 250go I want to create a database with that and access it by a python program that I'll be coding. I have a NAS server on my local network ( 1gbit network ) And I would ...
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21 views

Many linked tables in a NoSQL? Tons of connections, but only 1 master?

My company uses a NoSQL database (Mongo) for their product. However, their product is incredibly slow - which might be due to either the efficiency of their code, or/and the design of their database. ...
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38 views

Multiple Web Application - Cache Layer Design

I have multiple client e-commerce web applications running on a single VM, each web application is a node.js express application. The express web application communicates with the back end via API's ...
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1 answer
53 views

Could facebook minimize the number of servers if they used a faster database rather than MySQL? [closed]

Facebook needs 30,000 Servers to run. Seriously that's a lot! Facebook is old. It uses MySQL. I was wondering if they started with a much faster and efficient database, my question: 1. What database ...
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3 votes
2 answers
252 views

Nosql autoscaling of compute

Most of the nosql autoscaling faces issue due to the fact the data have to be migrated during peak load. What if data is stored in a shared storage like CLVM which has less overhead(compared to NFS or ...
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  • 219
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1 answer
102 views

Uploading large SQL Dump to a NoSQL table store

I have a WordPress blog on an Apache server with database in MySQL, I can get a SQL dump of the database which is around 4GB in size how do I properly import that data into a NoSQL table store from ...
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-1 votes
1 answer
318 views

Best database (SQL\NoSQL) for storing file hashes and corresponding description [closed]

I am working on a system that store file hashes and a corresponding description basically, the structure is very simple just 1 table, HASH (key) and File Description. For example: ...
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2 votes
2 answers
224 views

strange raw device perfromance on Aerospike ASD 3.15.1.4

I have a cluster of 4 servers. One of the namespaces is raw device based. The devices reside on a SAS mechanical hard drive. Now here is the weird part of the story. I am running one of the tests ...
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3 votes
1 answer
9k views

Enabling WiredTiger engine in MongoDB 3

I've problem with enabling WiredTiger engine by setings in mongod.conf I'm using Centos 7, and this is my config #/etc/mongod.conf storage: wiredTiger: engineConfig: ...
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4 votes
0 answers
87 views

OlegDB in production [closed]

When evaluating available NoSQL solutions, our team identified following product for evaluation: OlegDB. Site looks pretty decent and documentation is available. While site says it's production-ready ...
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1 answer
184 views

Riak setup and LB?

Quick question about setting up riak cluster. Do I need load balancer in front of the cluster ? The cluster will have 3 nodes with N =3, so successful write must have the data in 3 nodes. Any ...
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  • 151
-2 votes
1 answer
832 views

DataStax OpsCenter - can't connect with agents

I've installed DataStax OpsCenter (Apache Cassandra) and in OpsCenter, there is an error: "0 of 1 agents connected". When I click "fix", enter credentials and try to install nodes, ...
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1 vote
1 answer
831 views

Very strange disk-usage for replica in Mongodb

tl;dr: the new 2.6 replica eats up a lot more disk space than the 2.4 members. We're heavy users of MongoDB's GridFS. We're currently on 2.4, and are intending to upgrade to 2.6 by simply adding a ...
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0 votes
1 answer
127 views

Mirrored cache server on an EC2 Cluster?

I have EC2 instances serving up a non-intensive, relatively low traffic website, and rather than shelling out for ElasticCache I was thinking of doing the caching on each server and mirroring the data ...
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0 answers
56 views

Can the estimated time of access times for distributed keyvalue stores be below 1ms?

I'm digging through various Redis/Ceph/Elliptics benchmark to determine, whenever its theoretically possible to reach (very optimistic) request completion time below milliseconds in a non-SSD non-...
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1 vote
1 answer
662 views

Changing Cassandra Tokens on 1.2.1 From 4 to 256

We initially started our cluster using one datacenter, one rack, and the Simple replication strategy. We have keyspaces with several hundred gigabytes of data. When we changed the tokens in the ...
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3 votes
1 answer
2k views

"Cannot bind to port" enabling Cassandra client encryption

I'm running Cassandra 1.2 with a three-node cluster, on Debian 7. The cluster is working fine. But I want to enable encryption for clients, as documented here: ttp://www.datastax.com/documentation/...
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0 votes
1 answer
158 views

Which Database (SQL/NoSQL) is the best fit? [closed]

I have 2 nodes, one gateway and one worker. Data must be passed from gateway to worker (without direct connection). I would like to store a Key into a database identified with an ID and a Time To ...
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1 answer
550 views

Connecting to Cassandra Cluster

I'm just getting started with Cassandra and had a few questions. I'm going to be deploying a 4 node cluster on AWS as per the DataStax documentation (http://www.datastax.com/docs/datastax_enterprise3....
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1 vote
1 answer
968 views

automatically start and and selectively stop multiple instances of couchdb on osx

I have successfully installed couchdb via homebrew: % brew install couchdb ...and invoked mutiple instances as directed here: % OLD=/usr/local % NEW=/tmp/couchdb % mkdir -p $NEW/etc/couchdb/ % ...
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0 votes
1 answer
672 views

How to Handle 100 Million Users - MySQL or NoSQL [duplicate]

I need a solution for social networking webapp, the DB structure is users - login credentials. user_order - user orders. user_friends - user friends. We expect a solution to handle 100 million ...
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1 vote
2 answers
134 views

How to control databases replicated by Mongo DB replica set

I have 2 databases in my mongo DB namespace, lets name them db1, db2 and db3 which are on the same dbpath. Is it possible to configure mongo db replica set in that way that db3 wont be replicated ...
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0 votes
2 answers
263 views

Install Neo4j via Maven

Neo4j says I can install Neo4j via Maven by adding it to my build: <dependency> <groupId>org.neo4j</groupId> <artifactId>neo4j</artifactId> <version>1.8.1</...
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  • 127
0 votes
1 answer
69 views

Getting exposure to big data without having to set up the environment [closed]

Is anyone aware of any sandbox where an environment is already set up for big data processing? It can be hadoop, cassandra, pig etc... I'm a sql server programmer, and trying to get into big data/...
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1 vote
1 answer
68 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 ...
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0 votes
1 answer
52 views

DB Migration switching from MySQL [closed]

I currently have a massive MySQL Data but would like to move over to Cassandra nosql. How hard of a move over would this be? I've not found any examples yet on this being done. It is possible right.
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1 vote
1 answer
66 views

Is there a "rigorous" method for choosing a database? [closed]

I'm not experienced with NoSQL, but one person on my team is calling for its use. I believe our data and its usage isn't optimal for a NoSQL implementation. However, my understanding is based off ...
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2 votes
1 answer
900 views

Mongodb Slave replication lag

We using standard mongo setup: 2 replicas + 1 arbiter. Both replica servers use same AWS m1.medium with RAID10 EBS. We experiencing constantly growing replication lag on secondary replica. I tried ...
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0 votes
3 answers
219 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 secondary ...
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1 vote
1 answer
629 views

Should I use vm or set the maxmemory with Redis' 2.4

In redis 2.4 the vm-enabled no is the default, so I am using redis as database (not cache), and maybe occasionally the db size is larger than the memory, should I enable it? Or should I enfore ...
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2 votes
1 answer
2k views

non-mapped virtual memory & total number of connections

We have two MongoDB data nodes (replica set) - Primary & Secondary. I noticed that the non-mapped virtual memory is relatively high and wondering if they are hurting our MongoDB performance (The ...
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10 votes
1 answer
8k views

How to get the MongoDB' current working set size

From the doc , it said "For best performance, the majority of your active set should fit in RAM." So for example, my db.stats() give me { "db" : "mydb", "collections" : 16, "objects" : 21452, "...
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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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2 votes
2 answers
16k views

pnp4nagios is not creating graph for new services / hosts

I have working nagios infrastructure with pnp4nagios. Last days I added new host nosql and alerts of mongodb which is installed there. Host configuration: define host{ host_name ...
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  • 409
1 vote
3 answers
6k views

SQLite-like NoSQL option? [closed]

SQLite is nice for small, standalone projects, since the data file is a single object that lives with the project. Most of the NoSQL solutions I've seen are servers that store data there. Is there a ...
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1 vote
3 answers
5k views

Can I use redis with load balancer?

I am using redis's 1 master & 1 slave. I also want to use both under load balancer.So that I can make use of both redis server at once. Also I want to add slave as master's fail over. So can I ...
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0 votes
1 answer
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Is it possible to run Joomla in DynamoDB?

I'm trying to find a scalable way to run my Joomla installation with Amazon Web Services. I was very excited with the announcement of DynamoDB, but I'm not sure about the challenges to run Joomla on a ...
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2 votes
4 answers
4k views

RDBMS: Is it possible to scale out a RDB?

Is it possible to scale out a RDB ? If it's possible, how can one achieve it? I'm asking this question because I assisted to a NoSQL event in which the speaker told many times that the one of the ...
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0 votes
2 answers
133 views

One ColumnFamily places data on only 3 out of 4 nodes

I have posted this on cassandra-user mailing list however didn't get any responses just yet and I was wondering whether someone here on serverfault.com will have any ideas. I seem to have came across ...
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1 vote
0 answers
83 views

Archival storage tool: fast, queryable, has api, reliable

I have large quantities of structured data coming in over the network from disparate sources, and that data is archived in the filesystem, parsed/analyzed, and eventually makes it's way into a ...
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-1 votes
3 answers
463 views

What kind of database should I use because MySQL is not meeting my need? [closed]

Currently, I am using MySQL but I feel it is not keeping up with the stream data that is coming. I have memcached in front of MySQL for caching, but most the data is accessed for single time so the ...
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2 votes
4 answers
625 views

50,000 file in one directory, what is my best option?

I'm forced to have this directory structure /var/www/$WEBSITE/$DIR1/$DIR2/$FILES for each of those $FILES, there is approx 50,000 XHTML pages. I'm running Cherokee, which has new front-end caching ...
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  • 2,433
2 votes
3 answers
181 views

Database which only holds indexes and last X records in memory?

I'm looking for a data store that is very memory efficient while still allowing many object changes per second and disregarding ACID compliance for the last X records. I need this database for a ...
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  • 4,209
-1 votes
1 answer
256 views

Is it correct to say that using MySQL running on SSD disk on a server makes it comparable in performance to NoSQL Db? [closed]

As it is well known performance impact is quite significant when using the new SSD as opposed the old disk drives. If MySQL database including all the data is on SSD, how does that compare to NoSQL ...
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2 votes
3 answers
2k views

RedisToGo - remote Redis server. When to use one?

I like the concept of relying on third-party service hosting my data but what's the point of using super-fast NoSQL storage via remote hosting? It maybe in different datacenter or even country! And ...
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  • 336
4 votes
3 answers
670 views

What are the options for establishing a VLAN to support database sharding and replication?

Background: I'm writing a web application that will be available to the world at large on a software-as-a-service basis. As input to my choosing a database platform, I've been reading up on 'NoSQL' ...
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4 votes
0 answers
180 views

What does it mean when Twitter says their entire database is in RAM?

I am wondering where to begin with database scaling/optimization strategies. After reading articles like highscalability.com's facebook architecture article, and this twitter architecture article, I ...
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4 votes
5 answers
2k views

What does it mean when Twitter says their entire database is in RAM?

I am wondering where to begin with database scaling/optimization strategies. After reading articles like highscalability.com's facebook architecture article, and this twitter architecture article, I ...
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  • 233
1 vote
1 answer
577 views

Unable to connect to cassandra when using the AllowAllAuthenticator

I installed cassandra on a VM running Ubuntu Server 10.10. cassandra login failure with org.apache.cassandra.auth.AllowAllAuthenticator but I always receive the following error message: Login ...
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0 votes
1 answer
286 views

Getting a hosting provider if i use NoSQL technologies

My current system is being developed in codeignitor and MySQL. But we are adding Redis, Solr and either Cassandra or mongodb for some data structure storage. So the big question i am lost now if this ...
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