cassandra4 roadmap and datastax

Hi, I've came a cross of the following article https://hub.packtpub.com/the-road-to-cassandra-4-0-what-does-the-future-have-in-store/ It raised several questions: 1 Are DataStax and Cassandra team work together again? (I was surprised to see DataStax hosting Cassandra4 conference, despite the fa

Re: commitlog content

--- > Alain Rodriguez - @arodream - al...@thelastpickle.com > France / Spain > > The Last Pickle - Apache Cassandra Consulting > http://www.thelastpickle.com > > Le mar. 28 août 2018 à 18:24, Vitaliy Semochkin a > écrit : >> >> Hello, >>

Re: SSTable Compression Ratio -1.0

n size after compression! > > > > -Original Message- > From: Vitaliy Semochkin [mailto:vitaliy...@gmail.com] > Sent: Tuesday, August 28, 2018 12:03 PM > To: user@cassandra.apache.org > Subject: SSTable Compression Ratio -1.0 > > Hello, > > nodetool tablestat

commitlog content

Hello, I've noticed that after a stress test that does only inserts a commitlog content exceeds data dir 20 times. What can be cause of such behavior? Running nodetool compact did not change anything. Regards, Vitaliy - To unsu

SSTable Compression Ratio -1.0

Hello, nodetool tablestats my_kespace returns SSTable Compression Ratio -1.0 Can someone explain, what does -1.0 mean? Regards, Vitaliy - To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org For additional commands, e-

Re: data not deleted in data dir after keyspace dropped

8, 4:14 PM Vineet G H wrote: >> >> It takes a while in cluster for drop to propagte this depends on >> amount of data and network traffic between your storage nodes >> On Fri, Aug 24, 2018 at 1:54 PM Vitaliy Semochkin >> wrote: >> > >> > Hi, >&g

Re: benefits oh HBase over Cassandra

specific use-case, it'll be easier to discuss. > > Dinesh > > > On Friday, August 24, 2018, 1:56:31 PM PDT, Vitaliy Semochkin > wrote: > > > Hi, > > I read that once Facebook chose HBase over Cassandra for it's messenger, > but I never found what are th

Re: data not deleted in data dir after keyspace dropped

t of data and network traffic between your storage nodes > On Fri, Aug 24, 2018 at 1:54 PM Vitaliy Semochkin > wrote: > > > > Hi, > > I'm using cassandra 3.11 > > When I drop a keyspace it's data is not deleted from data dirs in a > > cluster. > &

Re: cqlsh --request-timeout=3600 doesn't seems to work

ded to do count in cassandra better if u can avoid it > > > On Fri, Aug 24, 2018, 4:06 PM Vitaliy Semochkin wrote: >> >> Hi, >> >> i'm running count query for a very small table (less than 1000 000 records). >> When the amount of records gets to 800 000 i r

why returned achievedConsistencyLevel is null

HI, While using DataStax driver session.execute("some insert query")getExecutionInfo().getAchievedConsistencyLevel() is already returned as null, despite data is stored. Why could it be? Is it possible to make DataStax driver throw an exception in case desired consistency level was not achieved d

cqlsh --request-timeout=3600 doesn't seems to work

Hi, i'm running count query for a very small table (less than 1000 000 records). When the amount of records gets to 800 000 i receive read timeout error in cqlsh. I tried to run cqlsh with option --request-timeout=3600, but receive same error, what should I do in order not to recieve timeout excep

speeding up cassandra-unit startup

Hi, I'm using cassandra-unit for integration tests, which is using regular cassandra.yaml to create a cassandra instance. What parameters are recommended to be changed in order to speed up startup process. Regards Vitaliy - To

benefits oh HBase over Cassandra

Hi, I read that once Facebook chose HBase over Cassandra for it's messenger, but I never found what are the benefits for HBase over Cassandra, can someone list, if there are any? Regards, Vitaliy - To unsubscribe, e-mail: user-u

data not deleted in data dir after keyspace dropped

Hi, I'm using cassandra 3.11 When I drop a keyspace it's data is not deleted from data dirs in a cluster. what additional steps are needed to make cluster nodes to deleted deleted data from the disk? Regards, Vitaliy - To unsubs

Re: which driver to use with cassandra 3

Spring data cassandra is so so ... It has less features (at last at the time > I looked at it) than the default Java driver > > For driver, right now most of people are using Datastax's ones > > On Fri, Jul 20, 2018 at 3:36 PM, Vitaliy Semochkin > wrote: >> >> Hi,

Re: how to make cassandra listen not on 127.0.0.1 on 9042

ur hostname resolves to? > > Best, > > On Fri, Jul 20, 2018 at 3:09 PM, Vitaliy Semochkin > wrote: >> >> Hi >> >> I'm building a cluster of cassandra RHEL 7 >> using cassandra 3.11.2 rpm >> >> I want cassandra to listen on 9042

which driver to use with cassandra 3

Hi, Which driver to use with cassandra 3 the one that is provided by datastax, netflix or something else. Spring uses driver from datastax, though is it a reliable solution for a long term project, having in mind that datastax and cassandra parted? Regards, Vitaliy

how to make cassandra listen not on 127.0.0.1 on 9042

Hi I'm building a cluster of cassandra RHEL 7 using cassandra 3.11.2 rpm I want cassandra to listen on 9042 on eth0 however no matter what I do, it listens on 127.0.0.1 I tried to specify listen_address instead but it doesn't work too. What am I missing? How to make cassandra listen on 9042 oth

Re: apache cassandra development process and future

general consensus in the mailing list lately. > For Scylladb and Datastax I don't know about the version to use. You should > ask them directly. > > C*heers, > --- > Alain Rodriguez - @arodream - al...@thelastpickle.com > France / Spain > > The

apache cassandra development process and future

Hi, Recently Cassandra eco system became very fragmented: Scylladb provides solution based on Cassandra wire protocol claiming it is 10 times faster than Cassandra. Datastax provides it's own solution called DSE claiming it is twice faster than Cassandra. Also their site says "DataStax no longer

Re: cassandra cluser sizing

ra before > CASSANDRA-6696 (which made jbod safer). > > -- > Jeff Jirsa > > > > On Jul 12, 2018, at 7:37 AM, Vitaliy Semochkin wrote: > > > > Hi, > > > > Which amount of data Cassandra 3 server in a cluster can serve at max? > > The documentat

cassandra cluser sizing

Hi, Which amount of data Cassandra 3 server in a cluster can serve at max? The documentation says it is only 1TB. If the load is not high (only about 100 requests per second with 1kb of data each) is it safe to go above 1TB size (let's say 5TB per server)? What will be safe maximum disk size a ser