network bandwidth question

Hi All We're trying to set up a Cassandra cluster (initially with 3 nodes). Each node will generate data @ 32MB per second. What would be the likely network usage for this (say with a replication factor of 3)? I mean, if I use simple arithmetic, I can say 32MBps per node, and hence 96MBps in tota

Re: performance degradation in cluster

Hi I'll explain a bit. I'm working with Abhinav. We've an application which was earlier based on Lucene which would index a huge volume of data, and later use the indices to fetch data and perform a fuzzy matching operation. We wanted to use Cassandra primarily because of the sharding/availabilit

Re: client threads locked up - JIRA ISSUE 1594

than Cassandra... Arijit On 25 January 2011 20:30, Nate McCall wrote: > What version of the Thrift API are you using? > > (In general, you should use an existing client library rather than > rolling your own - I recommend Hector: > https://github.com/rantav/hector). > > On Tue

Re: client threads locked up - JIRA ISSUE 1594

I'm using Cassandra 0.6.8. I'm not using Hector - it's just raw thrift APIs. Arijit On 21 January 2011 22:13, Nate McCall wrote: > What versions of Cassandra and Hector? The versions mentioned on this > ticket are both several releases behind. > > On Fri, Jan

client threads locked up - JIRA ISSUE 1594

Hi All I'm facing the same issue as this one mentioned here - https://issues.apache.org/jira/browse/CASSANDRA-1594 Is there any solution or work-around for this? Regards Arijit -- "And when the night is cloudy, There is still a light that shines on me, Shine on until tomorrow, let it be."

Re: how to do a get_range_slices where all keys start with same string

I have a follow on question on this. I have a super column family like this: I store some events keyed by a subscriber id, and for each such "row", I have a number of super columns which are keyed by an event time stamp. For example: subscriber1 { ts11 { some columns} ts12 { some col

Re: Why my posts are marked as spam?

I think this happens for RTF. Some of the mails in the post are RTF, and the reply button creates an RTF reply - that's when it happens. Wonder how the mail to which I replied was in RTF... Arijit On 12 January 2011 05:28, Oleg Tsvinev wrote: > Whatever I do, it happens :( -- "And when the n

TimeUUID question

Hi I'm using the piece of code given in the FAQ (http://wiki.apache.org/cassandra/FAQ#working_with_timeuuid_in_java) to convert a Date to UUID, and then trying to convert it back (using the example code given in Hector TimeUUIDUtils - convert the UUID to long (getTimeFromUUID) and then convert it

Re: quick question about super columns

t;(); >     mutationMap.put(getByteBuffer("RowKey"), mutations); >     client.batch_mutate(mutationMap, ConsistencyLevel.ONE); > > HTH! > > Thanks, > Naren > > > > On Thu, Jan 6, 2011 at 10:42 PM, Arijit Mukherjee > wrote: >> >> Thank you. And is

Re: quick question about super columns

t the Thrift APIs. I attempted to use Hector, but got myself into more confusion. Arijit On 7 January 2011 11:44, Roshan Dawrani wrote: > > On Fri, Jan 7, 2011 at 11:39 AM, Arijit Mukherjee wrote: >> >> Hi >> >> I've a quick question about supercolumns. >> E

quick question about super columns

Hi I've a quick question about supercolumns. Say I've a structure like this (based on the supercolumn family structured mention in WTF is a SuperColum): EventRecord = { eventKey1: { e1-ts1: {set of columns}, e1-ts2: {set of columns}, ... e1-tsn: {set of columns

Re: About a drastic change in performance

all records or try to find a list of all records matching a certain criteria? Is the hadoop-approach the only alternative? Arijit On 7 December 2010 15:41, Arijit Mukherjee wrote: > Hi All > > I was building an application which stores some telecom call records > in a Cassandra st

About a drastic change in performance

Hi All I was building an application which stores some telecom call records in a Cassandra store and later performs some analysis on them. I created two versions, (1) - where the key is of the form "A|B" where A and B are two mobile numbers and A calls B, and (2) - where the key is of the form "A|

partial matching of keys

Hi All I was wondering if it is possible to match keys partially while searching in Cassandra. I have a requirement where I'm storing a large number of records, the key being something like "A|B|T" where A and B are mobile numbers and T is the time-stamp (the time when A called B). Such format en

Re: Cassandra newbie question

ution could prove to be a bottleneck. Am I correct in my thinking? Regards Arijit On 27 October 2010 18:49, Gary Dusbabek wrote: > On Wed, Oct 27, 2010 at 03:24, Arijit Mukherjee wrote: >> Hi All >> >> I've another related question. >> >> I am using a stream

Re: Cassandra newbie question

, Gary Dusbabek wrote: > On Mon, Oct 11, 2010 at 04:01, Arijit Mukherjee wrote: >> Hi All >> >> I've just started reading about Cassandra and writing simple tests >> using Cassandra 0.6.5 to see if we can use it for our product. >> >> I have a data store

Re: Cassandra newbie question

Just a follow on question to this - would PIG be a good fit for such questions? Arijit On 11 October 2010 14:31, Arijit Mukherjee wrote: > Hi All > > I've just started reading about Cassandra and writing simple tests > using Cassandra 0.6.5 to see if we can use it for our prod

Cassandra newbie question

Hi All I've just started reading about Cassandra and writing simple tests using Cassandra 0.6.5 to see if we can use it for our product. I have a data store with a set of columns, like C1, C2, C3, and C4, but the columns aren't mandatory. For example, there can be a list of (k.v) pairs with only