RE: Cassandra on Ceph

What is the reason for running Cassandra on Ceph? I have both running in my environment but doing different things - Cassandra as transactional store and Ceph as block storage for storing files. From: Jan Sent: ‎2/‎1/‎2015 2:53 AM To: user

RE: Cassandra 2.0.11 with stargate-core read writes are slow

Is there any specific reason for using Cassandra for search instead of using something like elastic search & Kibana? From: Jan Sent: ‎1/‎31/‎2015 1:08 PM To: user@cassandra.apache.org Subject: Re: Cassandra

RE: dblink between oracle and cassandra

What are you trying to achieve? From: Rahul Bhardwaj Sent: ‎1/‎31/‎2015 2:05 AM To: user Subject: dblink between oracle and cassandra Hi All, I want make a dblink from oracle 11g and cassandra

Question about use scenario with fulltext search

Hi, I was just reading about cassandra and playing a little with it (using django www.djangoproject.com on the web server). One thing that I realized now is that fulltext search as in a normal sql statement (example): select name from users where name like 'Jo%'; Simply does not work because

Re: Question about use scenario with fulltext search

> > If you have a list of usernames stored in your cassandra database, > how could you find all usernames starting with 'Jo'? Cassandra does not support full text search on its own, if you are looking into DataStax enterprise Cassandra there is an integration with Slor that gives you this functio

Any problem mounting a keyspace directory in ram memory?

Hi guys, Please, does anyone here already mounted a specific keyspace directory to ram memory using tmpfs? Do you see any problem doing so, except by the fact that the data can be lost? Thanks in advance. Regards, Gabriel.

Re: Cassandra on Ceph

As Jan has already mentioned, Ceph and Cassandra do almost all of the same things. "Replicated self healing data storage on commodity hardware without a SPOF" describes both of these systems. If you did manage to get it running it would be a nightmare to reason about what's happening at the disk an

Re: Cassandra on Ceph

Thanks all for you input. I'm aware of the overlap, I'm aware I need to turn Ceph replication off, I'm aware this isn't ideal. Nonetheless in on my environments instead of raw disk to install C* on, I'm likely to just have Ceph storage. This is a fully managed environment (excepting for C*) and th

Re: Cassandra on Ceph

Oops - Nonetheless in on my environments -> Nonetheless in *one of* my environments On 2 February 2015 at 16:12, Colin Taylor wrote: > Thanks all for you input. > > I'm aware of the overlap, I'm aware I need to turn Ceph replication off, > I'm aware this isn't ideal. Nonetheless in on my envi

Re: Any problem mounting a keyspace directory in ram memory?

HI Gabriel;  I don't think Apache Cassandra supports in-memory keyspaces. However Datastax Enterprise does support it.  Quoting from Datastax: DataStax Enterprise includes the in-memory option for storing data to and accessing data from memory exclusively. No disk I/O occurs. Consider using the

Re: Question about use scenario with fulltext search

Also there is a project as Stargate-Core which gives the utility of querying with wildcard characters. the location is https://github.com/tuplejump/stargate-core/releases/tag/0.9.9 it supports the 2.0.11 version of cassandra.. Also elasticsearch is another product but pumping the data from Cass

Re: Question about use scenario with fulltext search

I tried elasticsearch but pulling up the data from Cassandra is a big pain. The river pulls up all the the data everytime and no incremental approach. Its a great product but i had to change my writing approach which i am just doing in Cassandra from .net client . Also you have to create a separate

Re: Any problem mounting a keyspace directory in ram memory?

Until the in-memory option stores data off heap, I would strongly recommend staying away from this option. This was a marketing driven hack in my opinion. -- Colin Clark +1 612 859 6129 Skype colin.p.clark > On Feb 2, 2015, at 5:31 AM, Jan wrote: > > HI Gabriel; > > I don't think Apache Ca

Re: Question about use scenario with fulltext search

I use solr and cassandra but not together. I write what I want indexed into solr (and only unstructured data), and related data into either cassandra or oracle. I use the same key across all three db's. When I need full text search etc, I read the data from solr, grab the keys, and go get the