Thanks a lot to all for information.
I think so that all the current Cassandra are pretty old and outdated.
On Oct 28, 2013 6:51 AM, Joe Stein crypt...@gmail.com wrote:
Reading previous version's documentation and related information from that
time in the past (like books) has value! It helps
We have seen read repair take very long time even for few GBs
Read Repair is a process that runs during a read to repair differences in the
background. It’s active on (by default) 10% of the reads.
I assume you mean nodetool repair (aka anti entropy). It runs in two phases,
first it
As soon as it came back up, due to some human error, rack1 goes down. Now for
some rows it is possible that Quorum cannot be established.
Not sure I follow here.
if the first rack has come up I assume all nodes are available, if you then
lose a different rack I assume you have 2/3 of the
1.2 w/ vnodes using LeveledCompactionStrategy, using 128 mb SSTables.
If you are using LCS the amount of overwritten / deleted data left will be
small.
Your row will be present in only 1 sstable per level. The number of levels is
included in the output from nodetool cfstats on the sstable
1] [14/10/2013:19:15:08 PDT] ScheduledTasks:1: WARN GCInspector.java (line
145) Heap is 0.8287082580489245 full. You may need to reduce memtable and/or
cache sizes. Cassandra will now flush up to the two largest memtables to
free up memory. Adjust flush_largest_memtables_at threshold in
(2 nodes in each availability zone)
How many AZ’s ?
The ec2 instances are m1.large
I strongly recommend using m1.xlarge with ephemeral disks or a higher spec
machine. m1.large is not up to the task.
Why on earth is the decommissioning of one node causing all the nodes to be
marked
Today I need to bring that data center back in. It is not 2-3 days out dated.
I have two options:
1) Treat this as a new data center and let the nodes sync from scratch, or
2) Bring the nodes back up with all the data in place and do a repair.
As long as the nodes were down for less than
Hi Erwin,
Few books are coming out these months :
* Octobre : Mastering Apache Cassandra
http://www.packtpub.com/mastering-apache-cassandra/book
* November : Cassandra High Performance Cookbook: Second Edition
http://www.packtpub.com/cassandra-high-performance-cookbook/book
* December :
The Cassandra team is pleased to announce the release of Apache Cassandra
version 2.0.2.
Cassandra is a highly scalable second-generation distributed database,
bringing together Dynamo's fully distributed design and Bigtable's
ColumnFamily-based data model. You can read more here:
Thanks a lot Dominique for the great update, it helped me pretty much!
Erwin Karbasi
ATT, Senior Software Architect
On Mon, Oct 28, 2013 at 11:51 AM, DE VITO Dominique
dominique.dev...@thalesgroup.com wrote:
Hi Erwin,
** **
Few books are coming out these months :
** **
*
Dominique,
Which of the books do you most recommend?
IMO, the Practical Cassandra is the best one.
Erwin Karbasi
ATT, Senior Software Architect
On Mon, Oct 28, 2013 at 1:21 PM, Erwin Karbasi er...@optinity.com wrote:
Thanks a lot Dominique for the great update, it helped me pretty much!
I don’t know : most of these books are not out, yet ;-)
[@@ THALES GROUP INTERNAL @@]
De : erwin.karb...@gmail.com [mailto:erwin.karb...@gmail.com] De la part de
Erwin Karbasi
Envoyé : lundi 28 octobre 2013 12:24
À : DE VITO Dominique
Cc : user@cassandra.apache.org
Objet : Re: Cassandra
Hey Erwin,Another option for you to learn Apache Cassandra is via DataStax’s free online training (apologies for the DS plug here; it is free though and teaches you how to get up-and-running with open source Apache Cassandra + Java, with more languages to come next year).It was just announced last
If I set ‘listen_address’ in ‘/etc/cassandra/cassandra.yml’:
listen_address: localhost
I can telnet:
telnet hostname 9160 -YES
telnet ip address 9160 -YES
telnet localhost 9160 - NO
I’m trying to get Usergrid to see Cassandra on localhost, which it currently is
unable to do. Usergrid is
Hi,
I've recently started with Cassandra I'm curious about how data can be
searched. As I understand it, where clauses only apply to primary keys and
secondary indices.
From what I've researched it appears two options are to use solr or
elasticsearch. I'd appreciate feeback from those that have
I was wondering if anybody could explain the rationale behind disallowing
selection of individual elements from a map in CQL and why an entire map
must be retrieved at once when items are stored as distinct columns? Are
there any plans to allow individual selection?
--
Liam Stewart ::
Hi Guys,
1. Before I slog my way through the documentation on using triggers? Is anyone
aware of any real world usage sample code or blogs with examples on this?
2. My use case is, if an update would result in changing (for example) the the
“name” field of the “person” table, storing a copy of
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