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0
votes
1answer
10 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 ...
-2
votes
1answer
127 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, i get error: ...
0
votes
1answer
66 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 ...
0
votes
1answer
69 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 ...
0
votes
0answers
24 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 ...
0
votes
0answers
93 views

Riak Backup restore process is very slow for large database

I have 5 node cluster of riak database. I have take backup of this database & trying to restore it with riak-admin. But it take too much much already 7days has passed & still restoration ...
1
vote
0answers
182 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 ...
3
votes
1answer
413 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: ...
0
votes
1answer
88 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 ...
0
votes
1answer
163 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 ...
0
votes
1answer
247 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/ % ...
0
votes
1answer
240 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 ...
1
vote
2answers
61 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 ...
0
votes
2answers
125 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> ...
0
votes
1answer
60 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 ...
1
vote
1answer
47 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
votes
1answer
43 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.
1
vote
1answer
59 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 ...
2
votes
1answer
266 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 ...
0
votes
3answers
162 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
votes
1answer
201 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 ...
2
votes
1answer
816 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 ...
3
votes
1answer
1k 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, ...
0
votes
1answer
180 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 ...
2
votes
2answers
6k 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 ...
0
votes
3answers
1k 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 ...
1
vote
3answers
1k 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 ...
0
votes
1answer
561 views

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 ...
0
votes
4answers
784 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 ...
0
votes
2answers
102 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 ...
1
vote
0answers
53 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 ...
-1
votes
3answers
424 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 ...
2
votes
4answers
355 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 ...
2
votes
3answers
169 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 ...
-1
votes
1answer
234 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 ...
0
votes
3answers
708 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 ...
4
votes
3answers
467 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' ...
4
votes
0answers
170 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 ...
3
votes
5answers
1k 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 ...
1
vote
1answer
363 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 ...
0
votes
1answer
270 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 ...
3
votes
6answers
661 views

How to achieve zero down time

For an application we want to achieve zero database and application down time using Active Active configuration. Our dB is Oracle Following are my questions: How can we achieve active active ...
0
votes
1answer
208 views

long dataset of small rows — infrequent writes, very frequent reads — what's the best platform?

A part of the platform I am building requires a large data table (starting at tens of millions of records, scaling to hundreds of millions within a year or two, maybe reaching billions at some point). ...
0
votes
1answer
753 views

Couchdb failing test suite on Linux

I've been trying to install CouchDB on my webfusion virtual server. I followed the latest instructions from the webfusion forum (see: http://forum.webfaction.com/viewtopic.php?id=2355 ) and it runs ...
3
votes
3answers
184 views

Suggestions for spatial database systems [closed]

I'm looking for suggestions on a database for large sets of spatial master data. The data itself is not relational, but could be formulated as such. The data as-is is structed as: latitude, ...
0
votes
1answer
233 views

Alternative Logging applications for Ubuntu

I am trying to find another logging application that will allow me to log to CouchDb. I am currently using rsyslog which is fine for logging to a mysql but doesnt seem to want to allow me to log ...
2
votes
2answers
187 views

Pairing MySQL and NoSQL Solutions

We have some fairly large datasets (user events and server log information - >100 GB) that's becoming fairly unwieldy for data processing. I've seen lots of activity around NoSQL/Hadoop/etc and I was ...
2
votes
2answers
226 views

High performance, fast yet Durable databases?

Up until recently I was using mongo to try and stem to tide of massive MySQL upgrades to system servers, however, after reading this: ...
1
vote
2answers
622 views

master-slave datastore replication, automatic failover, and wackamole

I have 2 dedicated servers provisioned for my next project's datastores. The datastores are configured for master-slave replication. There's no inherent automatic failover but I of course want this. ...
2
votes
3answers
2k views

Tokyo Tyrant ulog / update log management

I'm testing Tokyo Tyrant in a master-master setup and have found the ulog grows out of control and locks up the disk. At first I found the -ulim option useful and limited the logfile size, however it ...