RE: Read Repair in cassandra

The request would return with the latest data. The read request would fire against node 1 and node 3. The coordinator would get answers from both and would merge the answers and return the latest. Then read repair might run to update node 3. QUORUM does not take into consideration whether an an

Read Repair in cassandra

Hi All, I have a doubt regarding read repair while reading data. I and using QUORUM for both read and write operations with RF 3 for strong consistency suppose while write data node1 and node2 replicate the data but it doesn't get replicate on node3 because of various factors. coordinator node w

RE: Can cqlsh COPY command be run through

Thanks. That was kind of a logical guess is was having on it. Thanks for confirming. From: DuyHai Doan [mailto:doanduy...@gmail.com] Sent: Wednesday, April 08, 2015 1:05 AM To: user@cassandra.apache.org Subject: Re: Can cqlsh COPY command be run through Short answer is no. Whenever you access

Spark SQL Thrift JDBC/ODBC server + Cassandra

Hi - Is anybody using Cassandra with the Spark SQL Thrift JDBC/ODBC server? I can programmatically (within our app) use Spark SQL with C* using the Spark-Cassandra-Connector, but can't find any documentation on how to query C* through the Spark SQL Thrift JDBC/ODBC server. Would appreciate if y

Re: DSE 4.6 with OpsCenter 5.1.1, agent can't start, port 9042 is occupied by DSE

I think the problem is with the IP address. Cassandra does listen on 192.168.56.30 and you agent log complains about not being able to connect to 127.0.0.1. Worth investigating there On Sun, Apr 5, 2015 at 3:47 PM, Serega Sheypak wrote: > Hi, getting weird problem when agent to connect to OpsCe

Re: Can cqlsh COPY command be run through

Short answer is no. Whenever you access the session object of the Java driver directly (using withSessionDo{...}), you bypass the data locality optimisation made by the connector On Sun, Apr 5, 2015 at 9:53 AM, Tiwari, Tarun wrote: > Hi, > > > > I am looking for, if the CQLSH COPY command be

Re: How much disk is needed to compact Leveled compaction?

Check the size of your individual files. If your largest file is already more than half then you can’t compact it using leveled compaction either. You can take the system offline, split the largest file (I believe there is an sstablesplit utility and I imagine it allows you to take off the tail

Sstables remain after compaction (C* 2.0.13)

Hi all, I know, there was a thread with the same topic a while ago. But my problem is that I'm seeing exactly the same behavior with C*2.0.13. I.e. compacted sstables remain there after compaction for a long time (say ~24 hours, never waited longer than that). Those sstables are removed upon resta

Re: Cassandra PHP driver

On Tue, Apr 7, 2015 at 1:18 AM, Amlan Roy wrote: > I am using Cassandra 2.0.13. Which is the recommended PHP driver I can use > with this version of Cassandra? > The PHP driver from Datastax was released last week. https://github.com/datastax/php-driver =Rob

Re: Cassandra vs OS x

one more good summary: http://superuser.com/questions/845143/any-limitation-for-having-many-files-in-a-directory-in-mac-os-x 2015-04-07 13:49 GMT+02:00 Serega Sheypak : > That is the reason for trying to work with ZFS. Unfortunately, it was > dropped. > And that is the reason pcie interface for

Re: Cassandra vs OS x

That is the reason for trying to work with ZFS. Unfortunately, it was dropped. And that is the reason pcie interface for SSD in my MacBook pro. 2015-04-07 13:46 GMT+02:00 Serega Sheypak : > HFS: > The Catalog File, which stores all the file and directory records in a > single data structure, res

Re: Cassandra vs OS x

HFS: The Catalog File, which stores all the file and directory records in a single data structure, results in performance problems when the system allows multitasking , as only one program can write to this structure at a time, meaning that many p

Re: Cassandra vs OS x

Out of curiosity - could you elaborate on that or drop a link? Kind regards, Michał Michalski, michal.michal...@boxever.com On 7 April 2015 at 12:41, Serega Sheypak wrote: > It's single-threaded for writing :) > > 2015-04-07 13:13 GMT+02:00 Jean Tremblay < > jean.tremb...@zen-innovations.com>:

Re: Cassandra vs OS x

It's single-threaded for writing :) 2015-04-07 13:13 GMT+02:00 Jean Tremblay : > Hi, > > Why do everyone say that Cassandra should not be used in production on an > Mac OS x? > Why would this not work? > Are there anyone out there using OS x in production? What is your > experience with this? >

Re: Cassandra vs OS x

Cost may be a factor? OS X servers would cost a lot more than Linux servers. On Tue, Apr 7, 2015 at 4:13 PM, Jean Tremblay < jean.tremb...@zen-innovations.com> wrote: > Hi, > > Why do everyone say that Cassandra should not be used in production on an > Mac OS x? > Why would this not work? > Are t

Cassandra vs OS x

Hi, Why do everyone say that Cassandra should not be used in production on an Mac OS x? Why would this not work? Are there anyone out there using OS x in production? What is your experience with this? Thanks Jean

Cassandra PHP driver

Hi, I am using Cassandra 2.0.13. Which is the recommended PHP driver I can use with this version of Cassandra? Regards, Amlan

Re: Data stax object mapping and lightweight transactions

This is very much a Java Driver question so please try to use the java driver mailing list ( https://groups.google.com/a/lists.datastax.com/forum/#!forum/java-driver-user) for this type of question instead of the general Cassandra mailing list in the future. That said, to answer you question, no,