Re: Cassandra and GPU's...

Hi Tony, Somebody will likely prove me wrong on this (and I'd love to see it), but I'm skeptical that there is much intersection between the set of things a GPU is good at and the set of things a database needs to do. As such, I don't expect there'd be much performance gain unless a way to

Re: Cassandra and GPU's...

good evening; > On 2015-12-01, at 21:17, Steve Robenalt wrote: > > Hi Tony, > > Somebody will likely prove me wrong on this (and I'd love to see it), but I'm > skeptical that there is much intersection between the set of things a GPU is > good at and the set of things

Re: Cassandra and GPU's...

Hi James, Yup, the analytics side of database usage is ripe with possibilities, as the site at your link shows. In my original skepticism, I was referring not to the analytics using the database, but to the database itself. In Cassandra-specific terms, I would suggest that GPUs have more

Re: Transitioning to incremental repair

Sorry if I misunderstood, but are you asking about the LCS case? Based on our experience, I would absolutely recommend you continue with the migration procedure. Even if the compaction strategy is the same, the process of anticompaction is incredibly painful. We observed our test cluster running

Re: Cassandra and GPU's...

good morning; > On 2015-12-01, at 21:53, Steve Robenalt > wrote: > > Hi James, > > Yup, the analytics side of database usage is ripe with possibilities, as the > site at your link shows. that case is not the “analytics”, but the

CPU usage is increased on node addition, even after bootstrap is finished

Hi, CLUSTER SETUP I'm using Cassandra 2.2.3 running on small private cloud infrastructure (supported by ganeti+KVM). I have an initial Cassandra cluster of 8 nodes and a keyspace with Simple Strategy and Replication Factor 3, which is loaded with 2GBs of data (2GBs * 3rep = ~6GBs data in

Cassandra and GPU's...

Hi All, Can Cassandra use GPU's? If not can someone recommend a open source database that runs on GPU's? I am interested in seeing the performance difference of a database that is under 2GB run on a GPU card such as as NVIDA gtx 980. Thanks,-Tony

Re: Cassandra and GPU's...

unsubscribe On Tue, Dec 1, 2015 at 5:55 PM, james anderson wrote: > good morning; > > On 2015-12-01, at 21:53, Steve Robenalt wrote: > > Hi James, > > Yup, the analytics side of database usage is ripe with possibilities, as > the site at your

Re: Running sstableloader from every node when migrating?

Thank you Robert and Anuja, It does not seem that sstable2json is the right tool to go: there is no documentation beyond Cassandra 1.2, it requires a specific sstable to be given, which means a lot of manual work. The documentation also mentions it is good for testing/debugging but I would need

Re: Transitioning to incremental repair

Yes, it should now be safe to just run a repair with -inc -par to migrate to incremental repairs BUT, if you currently use for example repair service in OpsCenter or Spotifys Cassandra reaper, you might still want to migrate the way it is documented as you will have to run a full repair to

Transitioning to incremental repair

Hi folks, A question like this was recently asked, but I don't think anyone ever supplied an unambiguous answer. We have a set of clusters currently using sequential repair, and we'd like to transition them to incremental repair. According to the documentation, this is a very manual (and