Logging Cassandra Reads/Writes

possible to log the different delays involved in each operation-- for example, 0.1 seconds to get digests from all nodes, 1 second to transfer data, etc.? Thanks, Mohammad Hajjat -- View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Logging-Cassandra

Re: Logging Cassandra Reads/Writes

Blair, thanks for the clarification! My friend actually just told me the same.. Any idea on how to do logging?? Thanks! -- View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Logging-Cassandra-Reads-Writes-tp7588893p7588896.html Sent from the cassand

Re: Logging Cassandra Reads/Writes

ight help you with > this. > > On Tue, Jul 9, 2013 at 1:31 PM, Blair Zajac <[hidden > email]<http://user/SendEmail.jtp?type=node&node=7588930&i=1> > > wrote: > >> No idea on the logging, I'm pretty new to Cassandra. >> >> Regards, >&

Recommended data size for Reads/Writes in Cassandra

Hi, Is there a recommended data size for Reads/Writes in Cassandra? I tried inserting 10 MB objects and the latency I got was pretty high. Also, I was never able to insert larger objects (say 50 MB) since Cassandra kept crashing when I tried that. Here is my experiment setup: I used two Large VM

Are Writes disk-bound rather than CPU-bound?

“/Insert-heavy workloads will actually be CPU-bound in Cassandra before being memory-bound/” However, from reading the documentation (http://www.datastax.com/docs/1.2/dml/about_writes) it seems the disk is the real bottleneck in Writes rather than the CPU. This is because everything is *first *wri

Re: Are Writes disk-bound rather than CPU-bound?

andra Consultant > New Zealand > > @aaronmorton > http://www.thelastpickle.com > > On 22/07/2013, at 8:58 AM, hajjat <[hidden > email]<http://user/SendEmail.jtp?type=node&node=7589236&i=0>> > wrote: > > “/Insert-heavy workloads will actually be CPU-bound in Cassandra bef

Re: Recommended data size for Reads/Writes in Cassandra

ssary. > > > On Thu, Jul 18, 2013 at 4:31 PM, Andrey Ilinykh wrote: > >> there is a limit of thrift message ( thrift_max_message_length_in_mb), by >> default it is 64m if I'm not mistaken. This is your limit. >> >> >> On Thu, Jul 18, 2013 at 2:03 PM, hajj

Re: CPU Bound Writes

tually be CPU-bound in Cassandra before >> being memory-bound” >> >> ** ** >> >> Can someone explain why the internals of why writes are CPU bound ? >> >> ** ** >> >> ** ** >> > > -- *Mohammad Hajjat* *Ph.D. Student* *Electrical and Computer Engineering* *Purdue University*

Re: CPU Bound Writes

: > Everything is written to the commit log. In the case of a crash, cassandra > recovers by replaying the log. > > > On Sat, Jul 20, 2013 at 9:03 AM, Mohammad Hajjat wrote: > >> Patricia, >> >> Thanks for the info. So are you saying that the *whole* data is b

Socket buffer size

they have to be equal, one less than another, etc.? The documentation here is not really helping much! http://www.datastax.com/docs/1.2/configuration/node_configuration#rpc-send-buff-size-in-bytes Thanks! -- *Mohammad Hajjat* *Ph.D. Student* *Electrical and Computer Engineering* *Purdue University*

Re: CPU Bound Writes

ert-heavy workloads will actually be > CPU-bound in Cassandra before being memory-bound"? > What is the source of the quote ? > > Cheers > - > Aaron Morton > Cassandra Consultant > New Zealand > > @aaronmorton > http://www.thelastpickle.

Re: Socket buffer size

the nodes and the latter > for communication between nodes themselves as evident by the name of the > property. Please feel free to correct me if I am wrong. > > Regards, > Shahab > > > On Saturday, July 20, 2013, Mohammad Hajjat wrote: > >> Hi, >> >&g

Writing same key on two nodes using ONE consistency

nd up with same key having two different values on the two nodes)? Or would each node forward the write request to the node responsible to hold that key (determined by the hash function)? Thanks! -- *Mohammad Hajjat* *Ph.D. Student* *Electrical and Computer Engineering* *Purdue University*