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Showing posts with label cassandra1.0.8. Show all posts
Showing posts with label cassandra1.0.8. Show all posts
Sunday, July 3, 2016

apache cassandra 1.0.8 on READ_STAGE threads reference on sstables and so compaction cannot remove the sstables.

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Back then when I was administer a apache cassandra 1.0.8 cluster, I noticed there were some (very little) sstables did not get remove even a...
Sunday, March 29, 2015

My journey and experience on upgrading apache cassandra 1.0.8 to 1.0.12

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Upon request of my blog reader, today I will share with you my experience on upgrading apache cassandra version 1.0.8 to 1.0.12 on a produc...
Saturday, March 28, 2015

Investigate into apache cassandra corrupt sstable exception

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Today, we will take a look at another apache cassandra 1.0.8 exception. Example of stack trace below. ERROR [SSTableBatchOpen:2] 2015-03-07 ...
Friday, March 27, 2015

Investigate into apache cassandra get_slice assertion error

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Today, we will investigate another error from apache cassandra. Error as shown below in cassandra log. ERROR [Thrift:2] 2015-02-11 11:06:10,...
Sunday, January 18, 2015

how to improve apache cassandra 1.0.8 read speed

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This article is for improve reading speed for apache cassandra 1.0.8 . Because the reading improvement determined by many factors, we will i...
Saturday, January 17, 2015

Investigate into Apache Cassandra Memtable updateLiveRatio logging output

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Today, we are going to study apache cassandra 1.0.8 on memtable logging its statistics in the cassandra system.log. Example below WARN [Me...
Friday, January 16, 2015

operate casandra using jmx in terminal including changing pool size, compacting sstables and key cache

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If you operate apache cassandra cluster and if load per node goes huge (like nodetool info show 800GB) , compactions become a problem. It...
Saturday, January 3, 2015

apache cassandra 1.0.8 IncompatibleClassChangeError vtable stub and AssertionError Added column does not sort as the last column

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Today we will spend sometime to look into two errors and see if it is really something to concern about. The erros are thrown when apache ca...
Sunday, December 21, 2014

apache cassandra 1.0.8 out of memory error unable to create new native thread

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If you are using apache cassandra 1.0.8 and having the exception such as below, you may want to further read. Today, we will investigate on...
Sunday, November 23, 2014

Investigate into why key cache in apache cassandra 1.0.8 gets reduced

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Today, we will investigate into apache cassandra 1.0.8 when and why it reduce configured key cache . If you run the command nodetool cfstats...
Friday, July 18, 2014

Cassandra discarding obsolete commit log

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Often times, I noticed the log show the following lines in apache cassandra 1.0.8 INFO [COMMIT-LOG-WRITER] 2014-06-30 08:58:55,039 CommitLog...
Monday, May 5, 2014

Investigate into nodetool cleanup in cassandra

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In this article, we are going to study into cassandra 1.0.8 nodetool cleanup . From nodetool help description; Run cleanup on one or more co...