[
https://issues.apache.org/jira/browse/HBASE-14468?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Vladimir Rodionov updated HBASE-14468:
--------------------------------------
Description:
h2. FIFO Compaction
h3. Introduction
FIFO compaction policy selects only files which have all cells expired. The
column family MUST have non-default TTL. One of the use cases for this policy
is when we need to store raw data which will be post-processed later and
discarded completely after quite short period of time. Raw time-series vs.
time-based rollup aggregates and compacted time-series. We collect raw
time-series and store them into CF with FIFO compaction policy, periodically we
run task which creates rollup aggregates and compacts time-series, the
original raw data can be discarded after that.
See: https://github.com/facebook/rocksdb/wiki/FIFO-compaction-style
h3. To enable FIFO compaction policy
For table:
{code}
HTableDescriptor desc = new HTableDescriptor(tableName);
desc.setConfiguration(DefaultStoreEngine.DEFAULT_COMPACTION_POLICY_CLASS_KEY,
FIFOCompactionPolicy.class.getName());
{code}
For CF:
{code}
HColumnDescriptor desc = new HColumnDescriptor(family);
desc.setConfiguration(DefaultStoreEngine.DEFAULT_COMPACTION_POLICY_CLASS_KEY,
FIFOCompactionPolicy.class.getName());
{code}
h3. Limitations
Do not use FIFO compaction if :
* Table/CF has MIN_VERSION > 0
* Table/CF has TTL = FOREVER (HColumnDescriptor.DEFAULT_TTL)
* Table/CF is MOB
was:
h2. FIFO Compaction
h3. Introduction
FIFO compaction policy selects only files which have all cells expired. The
column family MUST have non-default TTL. One of the use cases for this policy
is when we need to store raw data which will be post-processed later and
discarded completely after quite short period of time. Raw time-series vs.
time-based rollup aggregates and compacted time-series. We collect raw
time-series and store them into CF with FIFO compaction policy, periodically we
run task which creates rollup aggregates and compacts time-series, the
original raw data can be discarded after that.
See: https://github.com/facebook/rocksdb/wiki/FIFO-compaction-style
h3. To enable FIFO compaction policy
For table:
{code}
HTableDescriptor desc = new HTableDescriptor(tableName);
desc.setConfiguration(DefaultStoreEngine.DEFAULT_COMPACTION_POLICY_CLASS_KEY,
FIFOCompactionPolicy.class.getName());
{code}
For CF:
{code}
HColumnDescriptor desc = new HColumnDescriptor(family);
desc.setConfiguration(DefaultStoreEngine.DEFAULT_COMPACTION_POLICY_CLASS_KEY,
FIFOCompactionPolicy.class.getName());
{code}
h3. Limitations
Do not use FIFO compaction if :
* table/CF has MIN_VERSION > 0
* table/CF has TTL = FOREVER (HColumnDescriptor.DEFAULT_TTL)
* Table/CF is MOB
> Compaction improvements: FIFO compaction policy
> -----------------------------------------------
>
> Key: HBASE-14468
> URL: https://issues.apache.org/jira/browse/HBASE-14468
> Project: HBase
> Issue Type: Improvement
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
> Fix For: 2.0.0
>
> Attachments: HBASE-14468-v1.patch, HBASE-14468-v2.patch
>
>
> h2. FIFO Compaction
> h3. Introduction
> FIFO compaction policy selects only files which have all cells expired. The
> column family MUST have non-default TTL. One of the use cases for this policy
> is when we need to store raw data which will be post-processed later and
> discarded completely after quite short period of time. Raw time-series vs.
> time-based rollup aggregates and compacted time-series. We collect raw
> time-series and store them into CF with FIFO compaction policy, periodically
> we run task which creates rollup aggregates and compacts time-series, the
> original raw data can be discarded after that.
> See: https://github.com/facebook/rocksdb/wiki/FIFO-compaction-style
> h3. To enable FIFO compaction policy
> For table:
> {code}
> HTableDescriptor desc = new HTableDescriptor(tableName);
>
> desc.setConfiguration(DefaultStoreEngine.DEFAULT_COMPACTION_POLICY_CLASS_KEY,
> FIFOCompactionPolicy.class.getName());
> {code}
> For CF:
> {code}
> HColumnDescriptor desc = new HColumnDescriptor(family);
>
> desc.setConfiguration(DefaultStoreEngine.DEFAULT_COMPACTION_POLICY_CLASS_KEY,
> FIFOCompactionPolicy.class.getName());
> {code}
> h3. Limitations
> Do not use FIFO compaction if :
> * Table/CF has MIN_VERSION > 0
> * Table/CF has TTL = FOREVER (HColumnDescriptor.DEFAULT_TTL)
> * Table/CF is MOB
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
