[#402707] Require a ruby project to automatically include the modules in classes defined in the same .rb file — Marc Heiler <lists@...>

Hi.

11 messages 2013/01/03
[#402738] Re: Require a ruby project to automatically include the modules in classes defined in the same .rb file — Josh Cheek <josh.cheek@...> 2013/01/04

On Wed, Jan 2, 2013 at 9:58 PM, Marc Heiler <lists@ruby-forum.com> wrote:

[#402764] Best practice for &&, ||, and, or — sto.mar@...

Hi group,

33 messages 2013/01/05
[#402786] Re: Best practice for &&, ||, and, or — "Jan E." <lists@...> 2013/01/05

Hi,

[#402812] newbie question what am I doing wrong? — "Lee V." <lists@...>

I wrote this simple program but it won't work. What am I doing wrong?

13 messages 2013/01/07

[#402856] Ruby on Android - usb/serialport — Scott Macri <lists@...>

Hello,

12 messages 2013/01/07

[#402880] One liner for filenames — Peter Bailey <lists@...>

Hello,

18 messages 2013/01/08

[#402890] Pure Ruby Jobs — Brandon Weaver <keystonelemur@...>

One thing has been bugging me lately. I've been looking around for jobs in

15 messages 2013/01/09

[#402958] how to open pop up window table? — Arup Rakshit <lists@...>

There is `text label` on a webpage, and I am trying to click on that to

13 messages 2013/01/10

[#403015] How Ruby environment varibles work in realtime program? — Arup Rakshit <lists@...>

Hi,

11 messages 2013/01/11

[#403051] Array methods creating confusions as per their functionalities — Arup Rakshit <lists@...>

Can any one just elaborate how the below works in Ruby, by definition

10 messages 2013/01/12

[#403062] How to take information from a text file and add them to an array — Adam Kennedy <lists@...>

Hi Im trying to take a list of usernames from a text file then add them

13 messages 2013/01/12

[#403083] Can anyone tell me the computational logic of Unpack() method of string? — Arup Rakshit <lists@...>

Hi,

17 messages 2013/01/12

[#403116] Garbage Collection and Fibers — Na Na <lists@...>

Hi,

20 messages 2013/01/13

[#403127] Conversion of Ruby-code to c/c++ code :: URGENT Plz help — "Nilesh S." <lists@...>

Hi.. I urgent require to convert the following ruby-code to c/c++ code.

11 messages 2013/01/14

[#403139] Installation query — Ron Herrema <lists@...>

I'm new to Ruby and am enjoying it, but when I installed, I attempted to

19 messages 2013/01/14

[#403205] Escaped backslashes in input strings - newbie question — John Sampson <jrs.idx@...>

I am trying to find a way of removing escaped characters in input

13 messages 2013/01/16
[#403208] Re: Escaped backslashes in input strings - newbie question — Alexander McMillan <alexandermcmillan@...> 2013/01/16

[#403244] Adding file directory automatically — Adam Kennedy <lists@...>

I have a bit of code that will add an amount to an array and then print

23 messages 2013/01/17

[#403326] question about string concatenation — David Richards <lists@...>

I'm puzzled about why the following happens (I'm using v1.9.3):

11 messages 2013/01/20

[#403377] Getting error "getaddrinfo: No such host is known. (Socke tError)" with mechanize gem — Arup Rakshit <lists@...>

I tried the below code:

9 messages 2013/01/22
[#403379] Re: Getting error "getaddrinfo: No such host is known. (Socke tError)" with mechanize gem — Robert Klemme <shortcutter@...> 2013/01/22

On Tue, Jan 22, 2013 at 3:52 PM, Arup Rakshit <lists@ruby-forum.com> wrote:

[#403423] Reading and looping through Excel — cristian cristian <lists@...>

Hi all!

16 messages 2013/01/24

[#403456] Can we attach documents to excel columns using Ruby? — Arup Rakshit <lists@...>

Suppose I do have some folders in a directory. Now say directory name

12 messages 2013/01/24

[#403540] Please explain in English — jooma lavata <lists@...>

I'm learning Ruby and I'm reading some expression that I saw on the

20 messages 2013/01/28

[#403553] Learning Ruby and proving your knowledge — Nathaniel Sokoll-Ward <lists@...>

Hey all,

19 messages 2013/01/28

[#403581] newbie question.. — Zebulon Bowles <lists@...>

So I'm taking a class on Ruby and it seems as though the teacher has

12 messages 2013/01/29

[#403607] (Errno::EINVAL) occurs during the File::rename() execution — Arup Rakshit <lists@...>

Hi I wrote the below code to rename the file names. The logic is during

12 messages 2013/01/30

[#403642] How to copy the directory files only to another directory? — Arup Rakshit <lists@...>

Hi,

18 messages 2013/01/30

[#403656] Does Ruby has any default database with it? — Arup Rakshit <lists@...>

I will do webpage scraping using Ruby and required Gems. But looking for

28 messages 2013/01/30
[#403657] Re: Does Ruby has any default database with it? — Brandon Weaver <keystonelemur@...> 2013/01/30

Normally sqlite is the go to being that it's the default of rails. Check

[#403667] Re: Does Ruby has any default database with it? — Justin Collins <justincollins@...> 2013/01/30

On 01/30/2013 10:21 AM, Arup Rakshit wrote:

[#403671] Re: Does Ruby has any default database with it? — Tony Arcieri <tony.arcieri@...> 2013/01/30

On Wed, Jan 30, 2013 at 12:07 PM, Justin Collins <justincollins@ucla.edu>wrote:

[#403674] Re: Does Ruby has any default database with it? — Arup Rakshit <lists@...> 2013/01/30

Tony Arcieri wrote in post #1094436:

[#403678] Re: Does Ruby has any default database with it? — Justin Collins <justincollins@...> 2013/01/30

On 01/30/2013 12:27 PM, Arup Rakshit wrote:

[#403735] Re: Does Ruby has any default database with it? — tamouse mailing lists <tamouse.lists@...> 2013/02/01

I think the best course for a new project is to start simple, go with

[#403698] Select "columns" from multidimensional array? — Joel Pearson <lists@...>

There's probably a simpler answer to this than the ways I've come up

51 messages 2013/01/31

[#403718] Ruby Project Ideas to get someone hired... — Colby Callahan <colby.callahan@...>

I have started learning Ruby this past week and have down the basics of

15 messages 2013/01/31

Re: What DB to use for lots of categorized urls and domains? noSQL? SQL?

From: Bob Hutchison <hutch-lists@...>
Date: 2013-01-15 14:21:38 UTC
List: ruby-talk #403168
On 2013-01-14, at 6:33 AM, Eliezer Croitoru <eliezer@ngtech.co.il> =
wrote:

> On 1/11/2013 3:10 PM, Robert Klemme wrote:
>> On Thu, Jan 10, 2013 at 9:36 PM, Eliezer Croitoru =
<eliezer@ngtech.co.il> wrote:
>>=20
>>> So I am wondering about other DB solutions that will not use too =
much
>>> storage space will be fast and can scale if needed.
>>=20
>> Scale in what direction?  Database size, requests per second, =
multiple
>> concurrent clients, multiple physical nodes the DB is stored on...?
>>=20
>> Kind regards
>>=20
>> robert
>>=20
> Thanks Robert,
>=20

Hi,

Here are a bunch of questions to ask yourself that cover off things that =
I've found helpful to know.

You might think about why you need to move from your combination of =
TokyoCabinet and Redis. In particular, why not Redis. It's a little more =
clear why you'd move from TokyoCabinet, I've used it happily for years =
myself, so I can imagine a bunch of reasons.


> The scale is in couple directions:
> - multiple physical nodes the main DB stored on.

Is this for reliability or performance? This sounds like a solution not =
a requirement.

> - Database size

How big do you think it'll be?

> - requests per second

What kind of request rate are you thinking?

Do you care about latency? (you should) Throughput and latency are =
pretty much independent variables when it comes to databases.

> - master and secondary updates\replication

Again, this sounds like a solution not a requirement. What's the issue =
that makes you say this?

What is your read/write ratio? What is your write rate? Are you updating =
or writing new data, and what's the ratio of update to write? Do you =
need secondary indexes? How many, what kind?

If you write to the master then replicate there'll be a time period =
where the various nodes will provide different results. Can your =
application tolerate this? or do you need some kind of stronger =
consistency constraint?

Are your updates/writes exposing you to consistency issues? (i.e. do you =
need transactions?) If you update (or even write) multiple records, it's =
possible that the updates arrive in an essentially random order to the =
replicas, and possibly in a different order to the different replicas.

>=20
> For now one machine will host the DB while it gets updates from couple =
sources such as human and other auto-testing tools.
> This will be a dedicated DB machine while there are others servers =
which gets updates from the master DB when needed.
> The problem is that the updates are live and should be replicated with =
the smallest delay possible.

What does "when needed" mean given that the updates should be "as soon =
as possible"? I'm thinking that this master/slave setup you're thinking =
of is lifted from how you'd do it with TokyoCabinet or Redis. Things =
like Cassandra or Riak or HBase don't do it that way.

Are you ever going to have to scan your whole database? How often?

Cheers,
Bob

>=20
> Thanks,
> Eliezer

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