Re: heavy insert load overloads CPUs, with MutationStage pending

2013-09-12 Thread Keith Freeman
Ok, your results are pretty impressive, I'm giving it a try. I've made some initial attempts to use Astyanax 1.56.37, but have some troubles: - it's not compatible with 1.2.8 client-side ( NoSuchMethodError's on org.apache.cassandra.thrift.TBinaryProtocol, which changed it's signature since

RE: heavy insert load overloads CPUs, with MutationStage pending

2013-09-12 Thread Paul Cichonski
I'm running Cassandra 1.2.6 without compact storage on my tables. The trick is making your Astyanax (I'm running 1.56.42) mutation work with the CQL table definition (this is definitely a bit of a hack since most of the advice says don't mix the CQL and Thrift APIs so it is your call on how far

Re: sstable compression

2013-09-12 Thread Robert Coli
On Thu, Sep 12, 2013 at 2:13 AM, Christopher Wirt wrote: > I would like to switch to using LZ4 compression for my SStables. Would > simply altering the table definition mean that all newly written tables are > LZ4 and can live in harmony with the existing Snappy SStables? > Yes, per Aleksey in #c

Re: VMs versus Physical machines

2013-09-12 Thread Aaron Turner
On Thu, Sep 12, 2013 at 5:42 AM, Shahab Yunus wrote: > I admit about missing details. Sorry for that. The thing is that I was > looking for guidance at the high-level so we can then sort out myself what > fits our requirements and use-cases (mainly because we are at the stage > that they could be

Eternal HintedHandoffs

2013-09-12 Thread Francisco Nogueira Calmon Sobral
Hi all! According to the DataStax blog (http://www.datastax.com/dev/blog/modern-hinted-handoff), once the dead node is up again, all the nodes that have hints to the node start sending information. However, it is written that they verify at every 10 minutes if there were timed out hints. Do t

RE: is the select result grouped by the value of the partition key?

2013-09-12 Thread John Lumby
Aaron,   thanks for the super-rapid response.    That clarifies a lot for me, but I think I am still wondering about one point embedded below. > From: aa...@thelastpickle.com > Subject: Re: is the select result grouped by the value of the partition key? > Date: T

Re: VMs versus Physical machines

2013-09-12 Thread Shahab Yunus
I admit about missing details. Sorry for that. The thing is that I was looking for guidance at the high-level so we can then sort out myself what fits our requirements and use-cases (mainly because we are at the stage that they could be molded according to hardware and software limitations/features

sstable compression

2013-09-12 Thread Christopher Wirt
I current use Snappy for my SSTable compression on Cassandra 1.2.8. I would like to switch to using LZ4 compression for my SStables. Would simply altering the table definition mean that all newly written tables are LZ4 and can live in harmony with the existing Snappy SStables? Then naturall