Java GC pauses, reality check

Hello! >From what I understand java GC pauses are pretty much a fact of life, but you can tune the jvm to reduce the likelihood of the frequency and length of GC pauses. When using Cassandra, how frequent or long have these pauses known to be? Even with tuning, is it safe to assume they cannot be

what operations don't update materialized views?

Hi, Are there any operations that skip updating the materialized views?

store individual inventory items in a table, how to assign them correctly

Say I have 100 products in inventory, instead of having a counter I want to create 100 rows per inventory item. When someone purchases a product, how can I correctly assign that customer a product from inventory without having any race conditions etc? Thanks.

RE: wide rows

Hi, Can someone clarify how you would model a "wide" row cassandra table? From what I understand, a wide row table is where you keep appending columns to a given row. The other way to model a table would be the "regular" style where each row contains data so you would during a SELECT you would w

understanding partitions and # of nodes

Hello, If you have a 10 node cluster, how does having 10 partitions or 100 partitions change how cassandra will perform? With 10 partitions you will have 1 partition per node. WIth 100 partitions you will have 10 partitions per node. With 100 partitions I guess it helps because when you add more

understanding partitions

Hello, If you have a 10 node cluster, how does having 10 partitions or 100 partitions change how cassandra will perform? With 10 partitions you will have 1 partition per node. WIth 100 partitions you will have 10 partitions per node. With 100 partitions I guess it helps because when you add more

Re: no more zookeeper?

he original facebook thrown > over the wall to zk. No official release has ever used zk directly. Though > people have suggested it. > > > On Tue, Jan 28, 2014 at 12:08 PM, Andrey Ilinykh wrote: > >> Why would cassandra use zookeeper? >> >> >> On Tue, Jan 28, 20

RE: no more zookeeper?

Does C* no long use zookeeper? I don't see a reference to it in the https://github.com/apache/cassandra/blob/trunk/build.xml If not, what replaced it?

Re: Rhombus - A time-series object store for Cassandra

This looks great, I havent' touched cassandra since 0.6 so looks like I have allot to learn :) To be able to run the tests locally, how do you go about starting cassandra? Is there a quick way to run cassnadra locally for tests only or do you just run it normally? On Thu, Jul 11, 2013 at 5:15

Re: Which of these VPS configurations would perform better for Cassandra ?

>From what I understood "tons" of people are running things on ec2, but it could be the instance size is pretty large that it compares to a dedicated server (especially if you go with SSD, it is like 1K/month!) On Tue, Aug 6, 2013 at 3:54 AM, Aaron Morton wrote: > how many nodes to start with(2

high write load, with lots of updates, considerations? tomestombed data coming back to life

I was watching some videos from the C* summit 2013 and I recall many people saying that if you can some up with a design where you don't preform updates on rows, that would make things easier (I believe it was because there would be less compaction). When building an Analytics (time series) app on

Re: funnel analytics, how to query for reports etc.

omething shorter > identifying this event). > > > > Then you can use counter column family to store counters, you can count > anything, number of sessions, total number of events, number of particular > events etc. One row per day for example. Then you can retrieve this row and >

funnel analytics, how to query for reports etc.

Would cassandra be a good choice for creating a funnel analytics type product similar to mixpanel? e.g. You create a set of events and store them in cassandra for things like: event#1 user visited product page event#2 user added product to shopping cart event#3 user clicked on checkout page even

is there a key to sstable index file?

Since SSTables are mutable, and they are ordered, does this mean that there is a index of key ranges that each SS table holds, and the value could be 1 more sstables that have to be scanned and then the latest one is chosen? e.g. Say I write a value "abc" to CF1. This gets stored in a sstable. T

is there a key to sstable index file?

Since SSTables are mutable, and they are ordered, does this mean that there is a index of key ranges that each SS table holds, and the value could be 1 more sstables that have to be scanned and then the latest one is chosen? e.g. Say I write a value "abc" to CF1. This gets stored in a sstable. T

Re: does anyone store large values in cassandra e.g. 100kb?

to distribute over that quite > nicely). > > Cassandra works well with semi-large objects, and it works well with wide > rows, but you have to be careful about the combination where rows get > larger than 64 Mb. > > T# > > > On Mon, Jul 8, 2013 at 8:13 PM, S Ahmed wro

Re: does anyone store large values in cassandra e.g. 100kb?

Hi Peter, Can you describe your environment, # of documents and what kind of usage pattern you have? On Mon, Jul 8, 2013 at 2:06 PM, Peter Lin wrote: > I regularly store word and pdf docs in cassandra without any issues. > > > > > On Mon, Jul 8, 2013 at 1:46 PM, S Ahme

does anyone store large values in cassandra e.g. 100kb?

I'm guessing that most people use cassandra to store relatively smaller payloads like 1-5kb in size. Is there anyone using it to store say 100kb (1/10 of a megabyte) and if so, was there any tweaking or gotchas that you ran into?

videos of 2013 summit

Hi, Are the videos online anywhere for the 2013 summit?

how to debug/trace

How can you possibly trace a read/write in cassandra's codebase when it uses so many threadpools/executers? I'm just getting into threads so I'm not to familiar with how one can trace things while in debug mode in IntelliJ when various thread pools are processing things etc.

java lib used in cli to provide auto-completion

Hi folks, I'm curious what java lib is used to provide auto-completion in the cli? Or is it all custom code?

unsubscribe

linux flavor?

Is there a particular linux flavor that plays best with Cassandra? I believe the file system plays big role also, any comments in this regard? thanks.

Re: indexing rows ordered by int

h a story. > > -Chris > > On Aug 15, 2010, at 7:34 PM, Benjamin Black wrote: > > > http://code.google.com/p/redis/ > > > > On Sat, Aug 14, 2010 at 11:51 PM, S Ahmed wrote: > >> For CF that I need to perform range scans on, I create separate CF that > have

indexing rows ordered by int

For CF that I need to perform range scans on, I create separate CF that have custom ordering. Say a CF holds comments on a story (like comments on a reddit or digg story post) So if I need to order comments by votes, it seems I have to re-index every time someone votes on a comment (or batch it e

why does it take 60-90 seconds for a new node to get up?

Why is it that, if you set AutoBootStrap = false that it takes 60-90 seconds for the node to announce itself? I just want to understand what is going on during that time, and why that specific timeframe (if there is a reason?)

explanation of generated files and ops

In /var/lib/cassandra there is: /data/system LocationInfo-4-Data.db LocationInfo-4-Filter.db LocationInfo-4-Index.db .. .. /data/Keyspace1/ Standard2-2-Data.db Standard2-2-Filter.db Standard2-2-Index.db /commitlog CommitLog-timestamp.log /var/log/cassandra system.log Is this pretty much all

Re: Growing commit log directory.

if your commit logs are not getting cleared, doesn't that indicate your load is more than your servers can handle? On Mon, Aug 9, 2010 at 4:50 PM, Edward Capriolo wrote: > I have a 16 node 6.3 cluster and two nodes from my cluster are giving > me major headaches. > > 10.71.71.56 Up 58.

Re: Question on nodetool ring

b/c node#1 has a start and end range, so you can see the boundaries for each node by looking at the last column. On Mon, Aug 9, 2010 at 4:12 PM, Mark wrote: > On 8/9/10 12:51 PM, S Ahmed wrote: > > that's the token range > > so node#1 is from 1600.. to 429.. > node#2

Re: Question on nodetool ring

that's the token range so node#1 is from 1600.. to 429.. node#2 is from 429... to 1600... hopefully others can chime into confirm. On Mon, Aug 9, 2010 at 12:30 PM, Mark wrote: > I'm running a 2 node cluster and when I run nodetool ring I get the > following output > > Address Status St

cassandra summit, making videos?

Will there be videos of the session at the Cassandra Summit in SF? I am really interested in the Cassandra codebase/internals seminar.

setting up a cluster

Is this the only documentation on startup up a cluster? http://wiki.apache.org/cassandra/GettingStarted I got a single node up, pretty straight forward. But have no idea how to setup a cluster. 1. Once I start a 2nd node, how do I tell it about th

Re: Estimated release for Cassandra 0.6.4

So is it a good estimate to give about 1 month per +.1 release? i.e. 7.0 should be "around" October/November? (btw great work, keep it up!) On Wed, Jul 21, 2010 at 12:15 AM, CassUser CassUser wrote: > Thanks Eric. > > > On Tue, Jul 20, 2010 at 8:14 PM, Eric Evans wrote: > >> On Tue, 2010-07-2

Re: Cassandra benchmarking on Rackspace Cloud

I'm reading what this thread and I am a little lost, what should the expected behavioral be? Should it maintain 53K regardless of nodes? nodes reads/sec 1 53,000 2 37,000 4 37,000 I ran this test previously on the cloud, with similar results: nodes reads/sec 1 24,000

Re: Newbie to cassandra

read the wiki, read about nosql in general. download and install it, play with it. browse the source code. read the bigdata paper by google, dynamo by amazon. On Sun, Jul 18, 2010 at 2:46 PM, sonia gehlot wrote: > Hi everyone, > > I am new to Cassandra and wanted to try and start learning Cassan

Re: key types and grouping related rows together

t thats OK so long as > you get the ones you want. > > Aaron > > > On 16 Jul, 2010,at 09:08 AM, S Ahmed wrote: > > Given a CF like: > > Articles : { > >key1 : { title:"some title", body: "this is my article body...", }, >key1 : {

Re: key types and grouping related rows together

, www.website2.com If I want to get the latest 10 articles for a given website, how would I formulate my key to achieve this? I basically need to understand how to handle multi-tenancy, b/c I will need to do this for almost all my CF's. I'm a little stuck here so guidance would be

Re: key types and grouping related rows together

> > On Wed, Jul 14, 2010 at 1:44 PM, S Ahmed wrote: > > Where is the link that describes the various key types and their impact > on > > sorting? (I believe I read it before, can't seem to find it now). > > So my application supports multi-tenants, so I need

Re: key types and grouping related rows together

(websiteidBytes, stampBytes); } So say this key is used in a ColumnFamily that stores Articles for all websites, using a key like this would allow me to get a range of articles written, ordered by date, for a specific website correct? On Thu, Jul 15, 2010 at 9:38 AM, S Ahmed wrote: > Well I&#x

Re: key types and grouping related rows together

and OPP this >> article may help >> >> http://ria101.wordpress.com/2010/02/22/cassandra-randompartitioner-vs-orderpreservingpartitioner/ >> >> Aaron >> >> >> On 15 Jul, 2010,at 08:44 AM, S Ahmed wrote: >> >> Where is the link that describes

key types and grouping related rows together

Where is the link that describes the various key types and their impact on sorting? (I believe I read it before, can't seem to find it now). So my application supports multi-tenants, so I need the keys to represent things like: website1123 + contentID or website3454 + userID And for range quer

Re: NYC Cassandra training

How will we load the VM on our machines? Do we download it ? Is it running Ubuntu? On Wed, Jul 14, 2010 at 11:11 AM, Jonathan Ellis wrote: > Turns out we can get a list from Eventbrite: > http://www.eventbrite.com/org/474011012?s=1926097 > > On Tue, Jul 13, 2010 at 3:09 PM, Jonathan Ellis wr

understand thrift

Just want some clarifications on thrift. 1. thrift creates a layer between Cassandra and the client, specific to whatever language you want. 2. thrift generates an interface to Cassandra's service endpoints *3. when Cassandra's endpoints have been modified, thrift needs to be re-generated (along

Re: advice, is cassandra suitable for a multi-tanency vBulletin type application?

The only issue I see (please correct me if I am wrong) is that you loose, is that you have single points of failure in the system now i.e. redis etc. On Tue, Jul 13, 2010 at 3:33 AM, Sandeep Kalidindi at PaGaLGuY.com < sandeep.kalidi...@pagalguy.com> wrote: > @michael - benjamin answered your que

Re: advice, is cassandra suitable for a multi-tanency vBulletin type application?

oded from scratch with most of the needed functionality. > > Cheers, > Deepu. > > > On Mon, Jul 12, 2010 at 7:49 PM, S Ahmed wrote: > >> Very interesting! >> >> What kind of integration do you have between vB and Cassandra? its not a >> port then? >&

Re: server needs thrift to run also?

ssa. > > -michael > > On Mon, Jul 12, 2010 at 1:55 PM, Stu Hood wrote: > > You'll need Thrift installed to generate the _client_ code: the server > code is embedded within Cassandra. > > > > -Original Message- > > From: "S Ahmed" &

Re: server needs thrift to run also?

he Thrift server is embedded in Cassandra, and starts by default. Look for > references to Thrift on: http://wiki.apache.org/cassandra/GettingStarted > > Thanks, > Stu > > -Original Message- > From: "S Ahmed" > Sent: Monday, July 12, 2010 3:43pm > To: use

server needs thrift to run also?

I'm trying to follow along the twissandra installation instructions. So to get it running I have to install Thrift. So thrift runs as another service? So communication is done via thrift, which then communicates to Cassandra on another port?

Re: advice, is cassandra suitable for a multi-tanency vBulletin type application?

r case a combination of cassandra and redis took care of most of the > functionality that vbulletin offers and much more. > > Cheers, > Deepu. > > > On Mon, Jul 12, 2010 at 9:58 AM, Paul Prescod wrote: > >> On Sun, Jul 11, 2010 at 8:39 AM, S Ahmed wrote: >> &

advice, is cassandra suitable for a multi-tanency vBulletin type application?

I want to build a vBulletin type application (forums, threads, posts, user management, etc). Support multi-tenancy for a Saas type environment. Would Cassandra be suitable for this type of application? Thanks in advance.

Re: TechCrunch article on Twitter and Cassandra

Nice link. >From what I understood, they are not using it to store tweets but rather will use mysql? I wish they went into more detail as to why... On Sat, Jul 10, 2010 at 1:25 AM, Kochheiser,Todd W - TOK-DITT-1 < twkochhei...@bpa.gov> wrote: > A good read. > > http://techcrunch.com/2010/07/09/

Re: NYC Cassandra training

My previous reply seemed to have bounced. Will there be a training day before/after the Cassandr Summit? (in SF on the 10th) On Fri, Jul 2, 2010 at 2:08 PM, Jonathan Ellis wrote: > Riptano's one day Cassandra training is coming to NYC in August, our > first public session on the East coast: > h

Re: Digg 4 Preview on TWiT

Agreed, what exactly did they replace it with. On Sun, Jul 4, 2010 at 8:14 AM, Bill de hÓra wrote: > On Mon, 2010-06-28 at 11:51 -0500, Eric Evans wrote: > > On Mon, 2010-06-28 at 07:53 -0700, Kochheiser,Todd W - TOK-DITT-1 wrote: > > > On a related but separate note: While I am fairly new to Ca

key data type and performance + multi-tenancy suggestions

1. Is there a difference in performance when you have keys that are int versus string/datetime? 2. When designing for multi-tenancy, what suggestions do you guys have? My idea thus far would be do prefix keys with the website like: com.example.keyname Seeing as keyspaces can't be buil

Re: Pelops 'up and running' post question + WTF is a SuperColumn => really confused.

.}, > 99B60047-382A-4237-82CE-AE53A74FB747: { category: > "somethingElse", reportType: "FOO", ...} > } > } > > On 3 July 2010 02:29, S Ahmed wrote: > >> >> https://ria101.wordpress.com/2010/06/11/pelops-the-beautiful-cassandra-da

Pelops 'up and running' post question + WTF is a SuperColumn => really confused.

https://ria101.wordpress.com/2010/06/11/pelops-the-beautiful-cassandra-database-client-for-java So using the code snipped below, I want to create a json representation of the CF (super). /** * Write multiple sub-column values to a super column... * @param rowKeyThe key of t

Re: facebook search index super column, do I have this correct?

Actually I think in the video they said they store each messageID as a seperate column, that way they can do range queries correct? so it would be: aloha: { message1: "2343", message2: "9590002", } On Thu, Jul 1, 2010 at 6:25 PM, S Ahmed wrote: > So trying to map h

facebook search index super column, do I have this correct?

So trying to map how facebook implemented a CF of type Super to index message terms. Is this json representation correct? MessageIndex = { userid1 : { aloha : { messageIdList: "234,2343234,23423434,234255,345345,2342,532432"}, clown : { messageIdList: "632, 2342, 23452, 234234, 23423

where is the video just before this one by Avinash?

In this video: http://vimeo.com/5185526 Avinash mentions that the previous presenter covered allot of what he was to cover. Does anyone have a link to that presentation?

vector maps and counts

(I realize the ability to get/set a count constantly is coming in a upcoming release) Can someone give me a high level of the design of the vector map solution? Is the actual count value stored in the CF row or is it stored separately?

Re: forum application data model conversion

Any thoughts? On Tue, Jun 22, 2010 at 2:13 PM, S Ahmed wrote: > Converting a Forum application to cassandra's data model. > > Tables: > > Posts [postID, threadID, userID, subject, body, created, lastmodified] > > So this table contains the actual question subject and

forum application data model conversion

Converting a Forum application to cassandra's data model. Tables: Posts [postID, threadID, userID, subject, body, created, lastmodified] So this table contains the actual question subject and body. When a user logs in, they want to see a list of their questions, and also order by the last-modif

Re: django or pylons

at 5:08 PM, Charles Woerner > wrote: > > I recently looked into this and came to the same conclusion, but I'm not an > expert in either Django or Pylons so I'd also be interested in hearing what > someone with more Python experience would say. > > On Sun, Jun 20

django or pylons

Seeing as I will be using a different ORM, would it make more sense to use pylons over django? >From what I understand, pylons assumes less as compared to django.

Re: CF that is like a non-clustered index, are key lookups that fast?

well it won't be a range, it will be random key lookups. On Tue, Jun 15, 2010 at 8:44 AM, Gary Dusbabek wrote: > On Tue, Jun 15, 2010 at 04:29, S Ahmed wrote: > > If you store only the key mappings in a column family, for custom > ordering > > of rows etc. for t

CF that is like a non-clustered index, are key lookups that fast?

If you store only the key mappings in a column family, for custom ordering of rows etc. for things like: friends = { user_id : { friendid1, friendid2, } } or topForumPosts = { forum_id1 : { post2343, post32343, post32223, ...} } Now on friends page or on the top_forum_posts page

Re: using cassandra w/django

h nosql-X". The GSoC might get there, but it's > pretty ambitious. > > On Fri, Jun 11, 2010 at 9:18 PM, S Ahmed wrote: > > When using cassandra with django, can you still use the rapid development > > freatures of django w/cassandra or are you basically just using

using cassandra w/django

When using cassandra with django, can you still use the rapid development freatures of django w/cassandra or are you basically just using the framework but the models and ORM features are up to you to implement since you are using cassandra.

Re: Cassandra training Jun 18 in SF

Nice! Would it be possible to give more than 2 weeks notice for the following events? Preferrably a month, its not that easy to get off work etc. On Fri, Jun 4, 2010 at 4:22 AM, Oleg Anastasjev wrote: > Jonathan Ellis gmail.com> writes: > > > > > This will be Riptano's 6th training session (in

Re: Cassandra training on May 21 in Palo Alto

So how did the event turn out? On Mon, May 17, 2010 at 4:07 PM, S Ahmed wrote: > Jonathan, > > Curious how many people have signed up? > > I hope you will do another one soon! > > > On Tue, May 11, 2010 at 12:42 PM, Vick Khera wrote: > >> On Fri, May 7, 201

Re: Problems running Cassandra 0.6.1 on large EC2 instances.

curious how did things turn out? On Tue, May 18, 2010 at 1:38 PM, Curt Bererton wrote: > We only have a few CFs (6 or 7). I've increased the MemtableThroughputInMB > and MemtableOperationsInMillions as per your suggestions. Do we really > need a swap file though? I suppose it can't hurt, but wi

is it possible to trace/debug cassandra?

Would it be possible to put cassandra in debug mode, so I could actually step through, line by line, the execution flow of operations I execute against it? If yes, any help would be great.

Re: Cassandra training on May 21 in Palo Alto

Jonathan, Curious how many people have signed up? I hope you will do another one soon! On Tue, May 11, 2010 at 12:42 PM, Vick Khera wrote: > On Fri, May 7, 2010 at 6:56 AM, Matt Revelle wrote: > > Reston, VA is a good spot in the DC metro area for tech events. > > +1 >

Re: zookeeper, how do you feed the pets?

ites for > counters, I highly advise against it. We got rid of ZK because of that. > > -Chris > > On May 16, 2010, at 7:04 PM, S Ahmed wrote: > > > Can someone quickly go over how you go about using zookeeper if you want > to store counts and have those counts be accurate? &g

zookeeper, how do you feed the pets?

Can someone quickly go over how you go about using zookeeper if you want to store counts and have those counts be accurate? e.g. in digg's case I believe, they are using zookeeper so they can keep track of digg's for a particular digg story. Is it a backend change only and then storing API calls

is cassandra really a 'handsoff' solution once setup?

realizing cassandra might be a little tricky to setup at first due to lack of docs etc. Once it is up and running/humming, is it a hands-off solution or does it require hand-holding/monitoring? I recall Joe Stump's blog post stating that it doesn't require an admin (or somethign to that effect wh

how does cassandra compare with mongodb?

I tried searching mail-archive, but the search feature is a bit wacky (or more probably I don't know how to use it). What are the key differences between Cassandra and Mongodb? Is there a particular use case where each solution shines?

what/how do you guys monitor "slow" nodes?

If you have 3-4 nodes, how do you monitor the performance of each node?

Re: Cassandra training on May 21 in Palo Alto

I guess the hard part would be recording something so long (9-5pm) A video that is split between the screen (say powerpoint) and linux console would be perfect :) On Fri, May 7, 2010 at 11:24 AM, Todd Burruss wrote: > +1 > > > > -Original Message----- > *From:

Re: Cassandra training on May 21 in Palo Alto

mer Clojure class sold out and already has two more return > visits planned. > > On May 7, 2010, at 6:42 AM, S Ahmed < > > sahmed1...@gmail.com> wrote: > > toronto :) > > If not toronto, Virginia. > > On Thu, May 6, 2010 at 5:28 PM, Jonathan Ellis < &g

Re: Cassandra training on May 21 in Palo Alto

toronto :) If not toronto, Virginia. On Thu, May 6, 2010 at 5:28 PM, Jonathan Ellis wrote: > We're planning that now. Where would you like to see one? > > On Thu, May 6, 2010 at 2:40 PM, S Ahmed wrote: > > Do you have rough ideas when you would be doing the next one? M

Re: Cassandra training on May 21 in Palo Alto

Do you have rough ideas when you would be doing the next one? Maybe in 1 or 2 months or much later? On Tue, May 4, 2010 at 8:50 PM, Jonathan Ellis wrote: > Yes, although when and where are TBD. > > On Tue, May 4, 2010 at 7:38 PM, Mark Greene wrote: > > Jonathan, > > Awesome! Any plans to off

Is Hector a wrapper around thrift?

Just trying to get my head wrapped around everything here, so bare with me :) So Thrift can spit out generated code for any language, be it C#, Java or python etc. Hector is a higher level wrapper around the java generated code by Thrift. Do I have this right? And Hector is probably the most wo

value size, is there a suggested limit?

Is there a suggested sized maximum that you can set the value of a given key? e.g. could I convert a document to bytes and store it as a value to a key? if yes, which I presume so, what if the file is 10mb? or 100mb?

Cassandra-cli tutorials

Ok excited I got it up and running on windows 7, yah! Curious, are there any tutorials or examples of using the cassandra-cli? BTW, the cassandra-cli is pretty cool, even comes with tab-complete, is that an OS thing or someone coded that feature up? I'm going to dig into the code for thistha

Re: getting cassandra setup on windows 7

ssandra > to start. It still throws another error complaining about the > log4j.properties. > > > On Fri, Apr 23, 2010 at 1:59 PM, S Ahmed wrote: > >> Any insights? >> >> Much appreciated! >> >> >> On Thu, Apr 22, 2010 at 11:13 PM, S Ahmed wrot

running cassandra as a service on windows

Is it possible to have Cassandra run in the background on a windows server? i.e. as a service so if the server reboots, cassandra will automatically run? I really hate how windows handles services

Re: getting cassandra setup on windows 7

Any insights? Much appreciated! On Thu, Apr 22, 2010 at 11:13 PM, S Ahmed wrote: > I was just reading that thanks. > > What does he mean when he says: > > "This appears to be related to data storage paths I set, because if I > switch the paths back to the default UNIX

Re: getting cassandra setup on windows 7

ache.org/jira/browse/CASSANDRA-948 > > On Thu, Apr 22, 2010 at 10:03 PM, S Ahmed wrote: > > Ok so I found the config section: > > > E:\java\cassandra\apache-cassandra-0.6.1-bin\apache-cassandra-0.6.1\commitlog > > > > > > > > E:\java\cassan

Re: getting cassandra setup on windows 7

at address: exception in thread main java.lang.noclassDefFoundError: org/apache/cassthreft/cassandraDaemon could not find the main class: org.apache.cassandra.threif.cassandraDaemon... On Thu, Apr 22, 2010 at 10:53 PM, S Ahmed wrote: > So I uncompressed the .tar, in the readme it s

getting cassandra setup on windows 7

So I uncompressed the .tar, in the readme it says: * tar -zxvf cassandra-$VERSION.tgz * cd cassandra-$VERSION * sudo mkdir -p /var/log/cassandra * sudo chown -R `whoami` /var/log/cassandra * sudo mkdir -p /var/lib/cassandra * sudo chown -R `whoami` /var/lib/cassandra My cassandra is at

Re: cassandra instability

If digg uses PHP with cassandra, can the library really be that old? Or they are using their own custom php cassandra client? (probably, but just making sure). On Fri, Apr 16, 2010 at 2:13 PM, Jonathan Ellis wrote: > On Fri, Apr 16, 2010 at 12:50 PM, Lee Parker wrote: > > Each time I start it

security, firewall level only?

Is security in terms of remote clients connecting to a cassandra node done purely at the hardware/firewall level? i.e. there is no username/pwd like in mysql/sqlserver correct? Or permissions at the column family level per user ?

Re: Just to be clear, cassandra is web framework agnostic b/c of Thrift?

Stump wrote: > > On Apr 18, 2010, at 5:33 PM, S Ahmed wrote: > > Obviously if you run asp.net on windows, it is probably a VERY good idea > to be running cassandra on a linux box. > > > Actually, I'm not sure this is true. A few people have found Windows > perf

Just to be clear, cassandra is web framework agnostic b/c of Thrift?

Just want to be clear, is it true that it really makes no difference if my web application is asp.net or java or python, since the way we communicate to Cassandra is via the Thrift generated interface? Obviously if you run asp.net on windows, it is probably a VERY good idea to be running cassandra

Re: if cassandra isn't ideal for keep track of counts, how does digg count diggs?

> > > They don't use cassandra for it yet. > > > > -ryan > > > > On Tue, Apr 6, 2010 at 9:00 AM, S Ahmed wrote: > >> From what I read in another thread, Cassandra isn't used for isn't > 'ideal' > >> for keeping track

Re: if cassandra isn't ideal for keep track of counts, how does digg count diggs?

Is it just the counters they are using mysql/postgresql for or also the list of stories? e.g. get me the top stories in category x. On Tue, Apr 6, 2010 at 12:50 PM, Ryan King wrote: > They don't use cassandra for it yet. > > -ryan > > On Tue, Apr 6, 2010 at 9:00 AM, S Ah

if cassandra isn't ideal for keep track of counts, how does digg count diggs?

>From what I read in another thread, Cassandra isn't used for isn't 'ideal' for keeping track of counts. For example, I would undertand this to mean keeping track of which stories were dugg. If this is true, how would a site like digg keep track of the 'dugg' counter? Also, I am assuming with ev

cms content and numerous sort operations

Greetings! Content management systems usually have complex sort operations, how would this be best handled with Cassandra? Is the only way to handle this type of situation to build indexes for each and every sort? example model: Content: { contentID: { title: "this is a title",