hbase/hbase-protocol-shaded
Andrew Purtell 8ec6fd9459
HBASE-25869 WAL value compression (#3244)
WAL storage can be expensive, especially if the cell values
represented in the edits are large, consisting of blobs or
significant lengths of text. Such WALs might need to be kept around
for a fairly long time to satisfy replication constraints on a space
limited (or space-contended) filesystem.

We have a custom dictionary compression scheme for cell metadata that
is engaged when WAL compression is enabled in site configuration.
This is fine for that application, where we can expect the universe
of values and their lengths in the custom dictionaries to be
constrained. For arbitrary cell values it is better to use one of the
available compression codecs, which are suitable for arbitrary albeit
compressible data.

Signed-off-by: Bharath Vissapragada <bharathv@apache.org>
Signed-off-by: Duo Zhang <zhangduo@apache.org>
Signed-off-by: Nick Dimiduk <ndimiduk@apache.org>
2021-05-21 11:05:52 -07:00
..
src/main HBASE-25869 WAL value compression (#3244) 2021-05-21 11:05:52 -07:00
README.txt HBASE-24056 Improve the layout of our proto files in hbase-protocol-shaded module (#1377) 2020-04-06 10:22:08 +08:00
pom.xml HBASE-25373 Remove HTrace completely in code base and try to make use of OpenTelemetry 2021-04-25 09:23:23 +08:00

README.txt

This module has proto files used by core. These protos
overlap with protos that are used by coprocessor endpoints
(CPEP) in the module hbase-protocol. So core versions have
a different name, the generated classes are relocated
-- i.e. shaded -- to a new location; they are moved from
org.apache.hadoop.hbase.* to org.apache.hadoop.hbase.shaded.

proto files layout:
protobuf/client - client to server messages, client rpc service and protos, used in hbase-client exclusively;
protobuf/rest - hbase-rest messages;
protobuf/rpc - rpc and post-rpc tracing messages;
protobuf/server/coprocessor - coprocessor rpc services;
protobuf/server/coprocessor/example - coprocessors rpc services examples from hbase-examples;
protobuf/server/io - filesystem and hbase-server/io protos;
protobuf/server/maser - master rpc services and messages;
protobuf/server/region - region rpc services and messages (except client rpc service, which is in Client.proto);
protobuf/server/rsgroup - rsgroup protos;
protobuf/server/zookeeper - protos for zookeeper and ones used exclusively in hbase-zookeeper module;
protobuf/server - protos used across other server protos;
protobuf/test - protos used in tests;
protobuf/ - protos used across other protos, exclusive for hbase-mapreduce and hbase-backup, other protos.