Merge branch 'cassandra-2.2' into cassandra-3.0
Project: http://git-wip-us.apache.org/repos/asf/cassandra/repo Commit: http://git-wip-us.apache.org/repos/asf/cassandra/commit/6e1e3369 Tree: http://git-wip-us.apache.org/repos/asf/cassandra/tree/6e1e3369 Diff: http://git-wip-us.apache.org/repos/asf/cassandra/diff/6e1e3369 Branch: refs/heads/trunk Commit: 6e1e336963fb801abb4ef694bc42cb88d19f91f3 Parents: 2dfcb22 4f14c85 Author: Marcus Eriksson <marc...@apache.org> Authored: Mon Aug 10 13:49:18 2015 +0200 Committer: Marcus Eriksson <marc...@apache.org> Committed: Mon Aug 10 13:50:40 2015 +0200 ---------------------------------------------------------------------- NEWS.txt | 2 ++ 1 file changed, 2 insertions(+) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/cassandra/blob/6e1e3369/NEWS.txt ---------------------------------------------------------------------- diff --cc NEWS.txt index 4a59553,37a1b9e..65df769 --- a/NEWS.txt +++ b/NEWS.txt @@@ -13,56 -13,6 +13,57 @@@ restore snapshots created with the prev 'sstableloader' tool. You can upgrade the file format of your snapshots using the provided 'sstableupgrade' tool. +3.0 +=== + +New features +------------ + - Materialized Views, which allow for server-side denormalization, is now + available. Materialized views provide an alternative to secondary indexes + for non-primary key queries, and perform much better for indexing high + cardinality columns. + See http://www.datastax.com/dev/blog/new-in-cassandra-3-0-materialized-views + + +Upgrading +--------- + - 3.0 requires Java 8u20 or later. + - The default JVM GC has been changed to G1GC. + - The default JVM flag -XX:+PerfDisableSharedMem will cause the following tools JVM + to stop working: jps, jstack, jinfo, jmc, jcmd as well as 3rd party tools like Jolokia. + If you wish to use these tools you can comment this flag out in cassandra-env.{sh,ps1} + - New write stages have been added for batchlog and materialized view mutations + you can set their size in cassandra.yaml + - User defined functions are now executed in a sandbox. + To use UDFs and UDAs, you have to enable them in cassandra.yaml. + - New SSTable version 'la' with improved bloom-filter false-positive handling + compared to previous version 'ka' used in 2.2 and 2.1. Running sstableupgrade + is not necessary but recommended. + - Before upgrading to 3.0, make sure that your cluster is in complete agreement + (schema versions outputted by `nodetool describecluster` are all the same). + - Schema metadata is now stored in the new `system_schema` keyspace, and + legacy `system.schema_*` tables are now gone; see CASSANDRA-6717 for details. + - Pig's CassandraStorage has been removed. Use CqlNativeStorage instead. + - Hadoop BulkOutputFormat and BulkRecordWriter have been removed; use + CqlBulkOutputFormat and CqlBulkRecordWriter instead. + - Hadoop ColumnFamilyInputFormat and ColumnFamilyOutputFormat have been removed; + use CqlInputFormat and CqlOutputFormat instead. + - Hadoop ColumnFamilyRecordReader and ColumnFamilyRecordWriter have been removed; + use CqlRecordReader and CqlRecordWriter instead. + - hinted_handoff_enabled in cassandra.yaml no longer supports a list of data centers. + To specify a list of excluded data centers when hinted_handoff_enabled is set to true, + use hinted_handoff_disabled_datacenters, see CASSANDRA-9035 for details. + - The `sstable_compression` and `chunk_length_kb` compression options have been deprecated. + The new options are `class` and `chunk_length_in_kb`. Disabling compression should now + be done by setting the new option `enabled` to `false`. + - Only map syntax is now allowed for caching options. ALL/NONE/KEYS_ONLY/ROWS_ONLY syntax + has been deprecated since 2.1.0 and is being removed in 3.0.0. + - Batchlog entries are now stored in a new table - system.batches. + The old one has been deprecated. + - JMX methods set/getCompactionStrategyClass have been removed, use + set/getCompactionParameters or set/getCompactionParametersJson instead. ++ - SizeTieredCompactionStrategy parameter cold_reads_to_omit has been removed. + 2.2 ===
